2015车工技能大赛教案

2015车工技能大赛 教案 中职数学基础模块教案 下载北师大版¥1.2次方程的根与系数的关系的教案关于坚持的教案初中数学教案下载电子教案下载 车工技能大赛专题培训 教案 (车工) 机电维修部 二零一五年四月 integrated energy, chemicals and textile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industry, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-3 GDP growth figure 2.1-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-Eastern State. Low mountains and hills in the city landscape as the main ridge-and-Valley, pingba small fragmented nature picture for "water and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, and spatial structure of typical zonal group, 2012-cities in building with an area of about 76.2km2. From city-building situation, "old town-the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industry, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-3 GDP growth figure 2.1-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-Eastern State. Low mountains and hills in the city landscape as the main ridge-and-Valley, pingba small fragmented nature picture for "water and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, and spatial structure of typical zonal group, 2012-cities in building with an area of about 76.2km2. From city-building situation, "old town-the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities, cities have been expanding, centripetal city traffic organization has not changed, 第一节,轴类零件的车削加工: 培训时间, 4.2 授课人,朱长生 轴类零件的车削加工: 1.粗车、精车,板书, 粗车,快速的去除多余的材料为精车留取合适的精车余量。 精车,保证工件的尺寸精度、形状 、位置精度和表面粗超度。 注,讲授粗精车时,在明确定义的基础上使学生理解它们的目的是关键,而且要能在实际中粗精车分开,粗车强调的是效率,精车强调质量。 2.切削三要素,板书, ,1,定义, 注, 分析 定性数据统计分析pdf销售业绩分析模板建筑结构震害分析销售进度分析表京东商城竞争战略分析 定义通过图形和实例帮助学生理解定义,对于切削速度要明确切削速度公式中字母的含义以及之间的关系。 ,2,切削速度的合理选择 v、f、,p根据切削用量三要素()对刀具耐用度不同的影响程度,在保证刀具经济耐用度的前提下,要取得最高的生产效率。通常选择切削 ,,f,vp用量的顺序为。即应首先考虑选取尽可能大的切削深度,fp,其次选用尽可能大的进给量,最后在保证刀具经济耐用度的条 v件下选取尽可能大的切削速度。 ,3,常用切削速度参考数值 车削Φ50外圆45#钢粗精车参考切削三要素, 粗车 精车 and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex1es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa- V=60-80m/min V=180-200m/min n=500rad/min n=1200rad/min f=0.35mm/rad f=0.09mm/rad a =3-4mm a =0.15-0.2mm pp 外圆尺寸控制方法经常使用的有两种,试切法和两刀法。 3.控制外径尺寸的方法,板书, (1)试切法适用于长度较长或有试切工艺台的工件,外圆精度容易保证,但因为试切表面和其他表面切削余量不同可能会引起前后尺寸不同,所以试切量和每次进给总余量不能相差太大一般背吃刀量不超过0.25mm,而且会引起同一外圆表面粗超度不同。另外因试切表面长度较短,一般为5mm,测量时需特别注意,不要因测量不准确造成尺寸精度达不到要求。 (2)两刀法就是粗车时留合适的精车余量,把精车余量分为两次进行车削。两刀法易于保证尺寸精度和良好的粗糙度,尤其能保证良好的粗超度,检查精车刀的切削效果。车削时效率较高,但需要掌握机床的精度特性,不适合车长度较长的工件。 1,用游标卡尺?精度不高 2,用内径千分尺 3,用内径百分表?常用 4,用塞规 注,讲授以上几种方法的优缺点及应用场合,注重讲授内径百分表的使用方法,在让学生明白原理的基础上,可一边讲一边为学生演 Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil2cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and- 示。 三、总结 4.长度尺寸控制方法,板书, 以上讲授的内容贯穿于车削台阶轴的整个过程之中,每个问题就是在加个中遇到的惑是说需要考虑的。通过以上的讲解以及操作演示要在实际应用中多体会,找出适合自己的方法。 车阶台轴时,长度方向尺寸精度影响套件的装配尺寸。粗车时, 0.2~0.4mm用大拖板控制,留的精车余量,精车时,用深度尺测量,借助小拖板刻度分两刀车至尺寸。 5.车削台阶轴工艺顺序,板书, 注,用大拖板控制长度的关键是长度对“零”方法如下,外圆粗车刀靠近工件端面,大拖板近似对零,返回并把大滑板摇至零位,进小滑板刻度,使车刀刀尖接触工件端面。中拖板控制尺寸的关键是中拖板不退刀,在原来的基础上控制最后的剩余量。 工艺安排注重强调粗精车分开,以及受加工热量的影响,先粗车那个台阶就先精车那个,另外长度和外径尺寸精车的顺序如何选择要讲明白。可以采用提问的方式提出问题要学生考虑,再对学生的答案作进一步的分析指出优缺点让学生做选择。 第二节,套类零件的车削加工 培训时间, 4.9 授课人,朱长生 (1)增强内孔车刀刚性的措施 1.车孔的关键技术,板书, 1,尽量增加刀杆的截面积 刃磨内孔车刀时尽量使刀尖位于刀 -building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex3es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u 杆中心的水平面上(平底孔例外),刀杆的截面积达到最大程度,使刀杆增粗,其刚性也就随之增强。 2)尽量缩短刀杆伸出长度 镗刀刀杆伸出过长,则刚性减弱,车削时容易引起振动和让刀,孔的精度和表面粗糙度均难以保证。因此刀杆伸出的长度略大于孔深即为适度。 (2)解决排屑问题的措施 主要是控制切屑流向。精车通孔,要求刀具采用正刃倾角,使切屑能稳定地流向待加工表面,不致划伤已加工表面,也就是通常所指的前排屑。精车盲孔或阶台孔,刀具则应采用零度的刃倾角,卷屑槽深度前后要一致,使切屑易卷曲而不易折断,通畅地从孔口排出,可避免切屑堵塞在孔内,损坏刀具和拉毛已加工表面。此外深孔加工应采用高压冷却法,即使用高压喷射切削液进行冷却,同时还能将碎断的切屑冲离切削区域,排出孔外。 ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil4cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012 4.孔径测量方法,板书, 注,讲授车孔的关键技术如何引入较重要,要能使学生特别注重这个问题,在操作中能应用并解决关键技术,可向学生提问,外圆和内孔相比哪个更难,有哪些难点,如何去解决, 2.钻孔,板书, ,1,钻孔时要合理选择钻头的大小,一般比使要求的孔小2mm, Dn,打孔时需注意根据 钻头越小转速越高,注意在打小孔时应v, 1000 先用中心钻定位。 ,2,孔深控制,在钻孔时孔深要合适,可用钻头划线法控制,也可用尾座摇动量控制,用尾座计时要由钻尖进入工件里面开始计起。 3.车削台阶孔的工艺顺序,板书, ,1,车直径较小的阶台孔时,由于观察困难尺寸精度不易掌握,所以通常先粗、精车小孔,再粗、精车打孔的方法。 ,2,车削大的阶台孔时,在视线不受影响的情况下,可选择粗车小孔、大孔,再精车小孔,精车大孔的方法。 ,3,车削孔径相差较大的阶台孔时,应先用钻头扩后再粗、精车。 注,讲授以上内容时可一方面让学生回想车台阶轴的过程,一方面步步引入车台阶孔,进行比较。 车削内孔是学生较难掌握的课题,尤其是学生在以前的学习中大多 Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex5es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and- 数没有接触过,有畏惧心理。实际关键就在车削内孔的刀具上,刀具解决好了,可真正的达到和车外圆一样容易。本课题可让学生练习较长的时间,一方面理解车削台阶轴,一方面把孔车好。把基础打扎实。 第三节,圆锥面及成形面加工 培训时间, 4.16 授课人,朱长生 定义,将小滑板按零件要求转一定的角度,使车刀的运动轨迹和圆锥教学内容 1.圆锥各部分名称及计算,板书, 内容公式见教材P206 注,讲授圆锥各部分名称及计算是要让学生掌握圆锥直径、圆锥角、圆锥长度、圆锥锥度之间的关系,并能做简单的计算,尤其是锥度的含义必须明确。 2.车削圆锥的方法,板书, ,1,偏移尾座法 ,2,靠模法 ,3,宽刃刀法 ,4,转动小滑板法 注,讲授方法是让学生明确每种方法的优缺点及应用于那种场合,如何选用。 3.转动小滑板车圆锥的方法,板书, 母线平行,然后手动进给,车削圆锥体。 注意事项,车削圆锥体时,小滑板转过的角度等于工件的圆锥半角。 the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil6cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not bee 当车削正锥体时,工件大端靠主轴,小端靠向尾座,,小滑板应逆时针转,反之顺时针转 。 培训时间, 4.23 授课人,朱长生 4.小滑板角度调整方法,板书, 用转动小拖板法车锥度,找出圆锥母线和车床轴线的夹角,夹角的大小就是圆锥半角。由锥度1,10,D-d=X1+X2的和X1= X2所以,如果X1= X2=0.5也就是说在圆锥上调整锥度时百分表从1点走到2点距离长10mm表转动0.5mm车削出圆锥的锥度为1,10,为方便计 算可以行程20表移动1mm进行计算,此时小拖板移动的是 -building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex7es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u 斜线但误差较小可以忽略不计。 注,调整小滑板角度需要利用锥度的公式,需要仔细分析使学生明白,调整角度为学生演示调整时可遵守差1格变10格的方式。 5.尺寸控制方法,板书, ,1,计算法 当外圆锥的尺寸较大或内圆锥的尺寸较小,表现在长度上还相差一个a的距离切削深度ap可用下列公式计算Ap=a tg (mm)或ap=a (mm) ,2,移动床鞍法, 使用圆锥量规检验工件尺寸,如果界限刻线或阶台面中心, 和工件端面间还相差一个长度a,可取下圆锥量规,调整车刀刀尖轻轻触及于小端端面与圆锥交界处,中拖板刻度不变,向后移动小拖板,在进大拖板刻度将车刀重新与工件端面轻触。虽然并未移动中滑板,但由于小滑板已沿圆锥素线方向移动了一定距离,故车刀相对于轴线也有了相应的位移。 注,控制尺寸的方法车外圆锥的方法可总结为进中拖板刻度和进大拖板刻度,用大拖板刻度控制有可演绎出划线法,例如用进中拖板刻度控制尺寸,大拖板不能动,摇动小拖板车削。车削内圆锥能用外圆锥去试并且要保证间隙这时适合用计算法。在内外圆锥配合时一定注意表面清洁孔口和尖角无毛刺。 控制内外锥配间隙及接触面积较难掌握需多练多总结,应先把外圆锥车熟练后再配作。 the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil8cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not bee 6.圆锥的检测 圆锥检测主要测量圆锥的角度和圆锥的直径。方法很多,但这里主要介绍常用的几种, ,1,万能角度尺测量 ,2,涂色法检查 ,3,基面直径偏差的检查 三、总结 外圆锥车削较容易,需注意两个问题一是要调整好角度,二是控制好尺寸。内外圆锥配合较难掌握,需控制间隙尺寸和接触面积,车削内圆锥对车刀的要求较高,车刀应锋利,在最后保证尺寸的时候可选择微量切削。判断间隙大小时一定要认真准确。 第四节,车削安全操作规程 培训时间,4.30 授课人,朱长生 cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex9es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town- 3.车刀的刃磨要求 1.车刀选择的基本要求,板书, ,2,加工质量好 ,4,断、排屑效果好 2.车刀的面和角,板书, ,1,车刀的六个独立角度,前角、后角、副后角、主偏角、副偏角、刃倾角。 ,2,外圆车刀的三个面和六个角的关系,即刃磨一个面要保证两个角度。 前刀面 主后刀面 副后刀面 前角 刃倾角 主后角 主偏角 副后角 副偏角 ,1,粗车刀的刃磨要求 ,2,精车刀的刃磨要求 4.砂轮,板书, ,1,砂轮材料的种类 ,2,砂轮的规格 ,3,砂轮的选用 5.车刀的刃磨顺序,板书, 1,粗磨, 用氧化铝砂轮粗磨车刀的三个面,使其和硬质合金面平齐 2,开槽, 把车刀的前刀面用碳化硅砂轮刃磨刀光,修砂轮刃角开断屑槽 Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil10cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. 3,精磨, 精磨三个面,保证刀具要求的角度 4,研磨, 根据不同的要求用油石研磨刀尖处的主切削刃和副切削刃 车刀刃磨训练是一个长期过程,掌握好磨一个面保证两个角度,实际 上是把角度摆好后的一个重复过程,刃磨时要勤于观察,三、总结 用力不要太大。 第五节,螺纹及蜗杆的车削加工 培训时间, 5.7 授课人,朱长生 1.螺纹车刀,板书, 车刀两侧的工作后角一般取3?,5?。当不存在螺纹升角时,如横向进给车槽,。车刀两侧的工作后角与刃磨后角相同。如图1,车右螺纹时,左侧的刃磨后角,,应等于工作后角加上螺纹升角,,,,aoL 为了保证刀头有足够的强度,车刀右侧的刃磨后角,a,应等于工oR作后角减去螺纹升角。即, ,a,(3:~5:)，OL a,(3:~5:),,OR and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex11es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa- 图1 螺纹升角对车刀两侧后角的影响 图2 螺纹升角对车刀两侧前角的影响 ,2,车刀两侧前角的变化 由于基面的位置发生了变化,车刀两侧的工作前角与刃磨前角,,不相等。从图2中可以看出,如果车刀两侧的刃磨前角均为0?,,0 在车右旋螺纹时,右侧刃的工作前角,,为负值,切削不顺利,,0eR 排屑也很困难。为了改善上述状况,可用图2所示的方法,将车刀两侧切削刃组成的平面垂直螺旋线装夹,使左侧刃的工作前角,,,0eL和右侧刃的工作前角均为0º,或在前刀面上沿两侧切削刃磨出较大前角的卷屑槽,使切削顺利并有利于排屑。 (3)螺纹车刀刀尖角,,的大小,决定于螺纹的牙型角,,。,,r 刀尖角应等于牙型角。 为了使切削顺利和减小螺纹的表面粗糙度,高速钢螺纹车刀纵向 ,,前角一般取5º,15º。硬质合金螺纹车刀的一般取0º。 pp 螺纹车刀的纵向前角不等于0º时,两侧切削刃不通过工件轴线,车出的螺纹牙侧不是直线而是曲线,这种误差对要求不高的螺纹来说,可以忽略不计。但当纵向前角较大时,对牙型角的影响较大。 ,ADE,,0:图3所示,是螺纹车刀的前刀面,其纵向前角,此时,p ,，DAE两侧切削刃之间的夹角,,将小于所要求的刀尖角,。如果等r于螺纹牙型角,车出的螺纹牙型角将大于规定要求。 ,当车刀纵向前角在5º,15º时,车刀两侧切削刃之间的夹角应 11():,(1):比牙型角小左右。 22 3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil12cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a 必须指出,纵向前角过大时,除了牙型变形较大之外,车削是还容易产生扎刀现象。 2.梯形外螺纹车刀的刃磨与安装,板书, 培训时间, 5.14 授课人,朱长生 图3 螺纹车刀纵向前角 ,1,两侧刀刃应锋利、平直,直线度好,表面粗糙度值小。 ,2,车刀两侧刃后角必须根据走刀方向相应增减一个螺纹升角。 ,3,注意车刀径向前角对螺纹牙型角的影响。磨有径向前角的螺纹车刀,其刀尖角必须通过计算或查表 加以修正,并在安装车刀时严格对准工件中心,保证螺纹获得正确牙型。 ,4,保证刀尖角不歪斜。若刀尖角对分线与工件轴线不垂直,将直接影响牙型半角,故在装刀时应使用对刀样板或万能角度尺进行校正。 cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex13es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town- ,5,梯形螺纹精车刀研磨时,由于砂轮的粒度、表面平整和跳动等因素对刃磨质量的影响,车刀刃磨后须进行仔细研磨,以使两侧刀刃平直、锋利、表面粗糙度值小。 1,前刀面的研磨,研磨前将油石的边棱按卷屑槽的形状在砂轮上先行修磨,使之略小于卷屑槽半径,然后用该油石在车刀卷屑槽上平稳地作往复运动,直到研磨出理想的表面粗糙度为止。 2,后刀面的研磨,为了减少研磨时间,减少研磨面积,保证油石相对于车刀的运动平稳,可在后刀面距刃口3~5mm处,用砂轮的角棱磨出几条深为0.5mm的沟槽,见图4, 图4 后刀面的研磨 a)油石水平研磨 b)油石垂直研磨 c)在研磨平板上研磨 对后刀面采用水平研磨方式较好,见图4,操作时油石作直线往复运动,力求用力均匀,运动平稳,不可操之过急,尽量使油石与车刀研磨面全部贴合,并注意经常保持油石研磨的平整。 为了提高螺纹车刀的研磨质量还可在研磨平板上进行精磨,见图4,。 building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil14cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr- ,,1,低速车削法 低速车削较小螺距,mm,的梯形螺纹,P,4 培训时间, 5.21 授课人,朱长生 3.梯形螺纹标注的含义,板书, Tr40×12,P6,—7h 4.梯形螺纹基本尺寸的计算,板书, 见教P282 5.梯形螺纹的车削方法,板书, 可用一把螺纹车刀,采用少量的左、右进给车削至规定要求。 粗车P=4~8mm之间的梯形螺纹时,为了防止三个刀刃同时参加切削因切削负荷过大而产生“扎刀”现象,则可采用左、右切削法,见图5,,牙型两侧留出精车余量,螺纹小径按要求车至尺寸,精车需换用螺纹精车刀,对螺纹牙型两侧进行左、右切削,直至达规定要求。 P,8mm车削的梯形螺纹,可先用类似矩形螺旋槽或阶梯螺旋槽,见图5,,然后再用螺纹精车刀车削牙型两侧至规定要求。 6.梯形螺纹的检测方法 ,1,三针法测量螺纹中径 三针测量单一中径是一种间接测量法,其原理如图6所示。测量时,三针放在同一条螺旋线的沟槽中,使其与牙侧的切点位于螺旋槽宽等于基本螺距一半的地方,即通过中 d径线,,再用公法线千分尺测得M 值,即能计算出单一中径 ,其2值按下式计算, 1P, ,,，，dMd(1)cot(mm)2D,22sin2 Valley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex15es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 式中 ,单一中径,mm, d2 ,,三针测量值,mm, P ,三针直径,最佳直径为,mm, d,dDD,2cos2 ,牙型角,,?,, , ,,螺距,mm。 ,,:30对于的梯形螺纹,,其中=0.518P dM4.864d1.866P,,，d2DD,2,单针法测量螺纹中径 如图7所示是用单针法测量螺纹中 径,它只需使用一根测量针,测量方法比较简便,其计算公式为, Md，A, 2 式中 ,-单针测量时千分尺上测量得的尺寸,mm,, ,-螺纹大径的实际尺寸,mm,, ,,三针测量值,mm。 用单针测量时,其偏差数值应是中径偏差的一半。 Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil16cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. 图6 用三针法测量螺纹中径 图7 用单针法测量螺纹中径 ,3,螺距测量仪测量螺纹螺距 螺距测量仪是将比较仪装在特殊的附件上组成,如图8 所示。附件的两个球形测量头放于螺纹螺旋槽内,其中活动测量头用杠杆机构与比较仪的测量杆相接触,活动测量头稍微摆动,比较仪的指针将随之摆动。测量时,先用标准螺距将比较仪的指针调到零位,再对零件进行测量,读得指针的偏摆量就是被测螺距的误差。 图8 用螺距测量仪测螺距 梯形螺纹车削重点在车刀刃磨,车刀刃磨需要满足具有足够的耐磨总结 性并且要锋利。车削螺纹一般掌握的较好,合格率相对较高, 就是在速度上有部分学生较慢,其原因还是对车削过程掌握的不是很牢固。 cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex17es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town- 第六节,组合件的车削加工 培训时间, 5.28 授课人,朱长生 在制订组合件的加工工艺 方案 气瓶 现场处置方案 .pdf气瓶 现场处置方案 .doc见习基地管理方案.doc关于群访事件的化解方案建筑工地扬尘治理专项方案下载 和进行组合件加工时,应注意以下要点, 1,仔细消化和分析组合件的装配关系,确定基准零件,也就是直接影响组合件装配后零件间相互位置精度的主要零件。 2,组合件加工时,应先车削基准零件,然后根据装配关系的顺序,依次车削组合件中的其余零件。 3,车削基准零件时应注意以下几点, (1)影响零件间配合精度的诸尺寸(径向尺寸和轴向尺寸),应尽量加工至两极限尺寸的中间值,且加工误差应控制在图样允许误差的1,2,各表面的几何形状误差和表面间的相对位置误差应尽可能小。 (2)有锥体配合时,锥体的圆锥角误差要小,车削时车刀刀尖应与锥体轴线等高,避免加工中产生圆锥素线的直线度误差。 (3)有偏心配合时,偏心部分的偏心量应一致,加工误差应控制在图样允许误差的1,2,且偏心部分的轴线应平行于零件轴线。 (4)有螺纹配合时,螺纹应车制成形,一般不允许使用板牙、丝锥加工,以保证同轴度要求。螺纹中径尺寸,对于外螺纹应控制在最小极限尺寸范围,对于内螺纹则应控制在最大极限尺寸范围,以使配合间隙尽量大一些。 (5)零件的各加工表面间的锐边应倒钝,毛刺应清理干净。 Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil18cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and- 4,组合件中其余零件的车削,一方面应按基准零件车削时的要求进行,另一方面更应按已加工的基准零件及其他零件的实测结果相应调整,充分使用配车、配研、组合加工等手段以保证组合件的装配精度要求。 5,根据各零件的技术要求和结构特点,以及组合件装配的技术要求,分别拟订各零件的加工方法,各主要表面(各类基准表面)的加工次数(粗、半精、精加工的选择)和加工顺序。通常应先加工基准表面,后加工零件上的其他表面。 第七节,零件的工艺分析 培训时间, 6.4 授课人,朱长生 一、相关知识 在实际的零件加工中,特别是高技能考试操作中的车削加工零件中,零件的表面不会是单一的表面组成。往往会由不同形状,不同 尺寸多个表面。在加工零件除了要进行表面车削外,还要进行其他铣、磨、钳及热处理等工种的加工。因此在车削零件前必须对加工零件进行综合的工艺分析,确保加工零件的加工质量。 加工工艺的制定非常重要,普车加工一般不会用手写下来。往往是操作者根据操作的经验,而边操作边制定加工工艺。 加工工艺的好坏,直接关系着生产零件的质量的好坏。当会做事的时候,就看谁的加工工艺制定的合理正确。 building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex19es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u- 1、 基准的选择 加工基准是保证加工正确的首要条件,也是各加工表面形状等关系的依据,是各表面的加工和测量依据。一般情况下操作者应选择, 设计 领导形象设计圆作业设计ao工艺污水处理厂设计附属工程施工组织设计清扫机器人结构设计 基准与加工基准、安装基准、测量基准相同。这样可以消除加工的积累误差。保证加工质量。 如图, 各表面的设计基准为Ø95h6的两外圆表面所决定的轴线,是各径向尺寸的基准,轴向基准为端面B。 2、工艺基准的选择 在制定工艺加工过程中选择的基准面,称为工艺基准。根据用途不同,工艺基准可分为定位基准、测量基准、和装配基准。 ,1,定位基准 在加工中,用于工件定位的基准称为定位基准。轴类工件的定位基准为两端面的中心孔。根据要求轴类零件的表面要求不 -nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil20cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city 高的可以选择一个外表面作为定位基准。但毛坯面只能作为一次 装夹的定位。 ,2,测量基准 测量时所采用的基准称为测量基准。一般有内孔的工件时,应选择内孔为测量基准。因为内孔的加工比外圆要难,所以要加工好内孔尺寸后,才把外圆尺寸加工好。 ,3,装配基准 装配时用来确定零件或部件相对位置所采用的基准称为装配基准。 培训时间, 6.11 授课人,朱长生 二、定位基准的选择 零件的加工过程中,合理选择定位基准对保证工件的尺寸精度,尤其是位置精度起着决定性的作用。 1、定位基准分为 粗基准和精基准两种。 用毛坯表面作为定位基准的称为粗基准,用已加工过的表面作为定位基准称为精基准。 2、 粗基准的选择时,应着重考虑以下三方面, ,1,选择不加工表面作为粗基准,这样可以使加工表面与不加工表 面之间的位置误差最小。 ,2, 在有较多加工表面时,应选择毛坯余量最少的为粗基准。这样 容易使工件全部加工起来。 ,3,选择粗基准的表面应尽可能平整,并有足够大的面积,还要除 去飞边、毛刺,使之定位准确、夹紧可靠,避免打刀。 Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex21es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and- ,4,粗基准的表面应避免重复使用。粗基准只允许使用一次,否则 将无法保证加工表面间的位置精度。 ,5,粗基准表面一般是夹紧受力的面,它应有足够的刚性,不易变 形。 3、 精基准的选择 应保证工件的加工精度,同时使工件装夹方便、正确、可靠。,1,一般尽可能的选择设计基准为精基准。 ,2, 尽可能使精定位基准与测量基准重合。 ,3, 尽可能使装配基准与精基准重合。 ,4,尽可能使基准统一,除第一道工序外,其余的尽量采用同一精 基准来加工大多数表面。这一原则对于多道工序、多个工种加 工的工件或位置精度要求较高的表面尤其重要。它可减少定位 误差,提高加工精度,且全球装夹。 培训时间, 6.18 授课人,朱长生 三、加工表面的选择 选择零件各表面加工方法,是拟定零件加工工艺路线的主要任务之一。对待零件的各加工表面,有不同的加工方法,而同一表面有几种加工方法,而不同的加工方法,又具有不同的技术经济效果。选择加工方法,一般是根据经验或查表来确定。一般要考虑几个因素, 1、 加工经济指数。 2、 工件的结构形状和尺寸大小。 3、 工件材料性能和热处理的影响。 -Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil22cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and 4、 生产效率。 5、 现有的生产条件。 6、 个人的操作水平。 四、划分加工阶段 1、 一般根据工件的结构形状与精度要求,分为粗、精加工。 ,1,粗加工阶段 ,2,半精加工阶段 ,3,精加工阶段 ,4,光整加工或超精加工阶段 2、确定加工顺序 ,1,工序 ,2,安装 ,3,工位 ,4,工步 实训要求, 1、 合理的选择加工基准,注重定位基准的选择。。 2、 合理的制定零件的加工工艺路线。 3、 充分的利用现有的条件,制定加工工艺。 实训效果, 能合理制定较复杂工件的加工工艺路线。 教学反思 平行与垂直的教学反思班会课教学反思分数的初步认识教学反思科学我从哪里来教学反思平行与垂直教学反思 , 学生通过训练对加工基准概念初步认识,但在加工过程中, -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex23es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa 基准的选择应用及基准的过渡,还应加强练习。 第八节,典型轴类工件的工艺分析 培训时间, 6.25 授课人,朱长生 一、技能训练任务 1.技能训练用图 ?0.012 1.5 Tr32×12(P6) 30 ?38103315 106106 2.图样工艺分析 ,1,工件材料为Ø50×120?的45#钢棒料. ,2,工件形状为双头的梯形螺纹、带有偏心和圆锥体工件。 ,3,工件的外圆精度要求较高,应选择两顶的方法进行精加工。 ,4,工件应分为粗、精加工两个阶段进行加工。 ,5,螺纹的粗加工,应保留牙顶宽度在2.5,2.6?左右。 Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil24cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and- ,6,工件两端面应打A3的中心孔,尽量的保证两中心孔的同轴度。 ,7,精车外圆时,应采用试车的方法。保证工件的尺寸精度。 ,8,加工完工件尺寸后,应全面检查所有的尺寸,并去毛刺。 实训要求, 1、 注重定位基准的选择,两中心孔的加工质量。 2、 确保外圆尺寸精度的控制。 3、 粗车的留有精车余量,不宜过多。 实训效果, 提高学生的综合加工能力,重点是工件的工艺分析与加工尺寸控制。 教学反思, 通过加工有了,综合加工的基本认识。对综合技能有一定的 的提高。 第九节,零件的尺寸精度与形位精度的控制 培训时间, 7.2 授课人,朱长生 一、相关知识 影响工件加工质量因素很多,如工件的装夹方法、车刀的几何参数、切削用量的选择、操作者选用的加工工艺、机床的精度等都会对加工精度产生影响。一般加工精度分为尺寸精度与形位精度。尺寸精度要求较高的零件,它的外表面的粗糙度值应要求较小。尺寸精度与形位精度有一定的关系,但不是绝对的。形位精度要求较高的,不一 Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex25es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and- 定尺寸精度要求较高。一般只有尺寸精度的要求,还好对应。一但有形位要求时,加工工艺的选择就应采取相应的措施。对于轴类零件来说,主要是采用两顶的方法。 二、尺寸精度的控制方法 1.正确的分析零件的加工工艺,选择正确的加工路线。 2.正确的选用加工基准。轴类零件的加工基准为轴心线上。 3.加工零件时,分粗加工与精加工两个阶段,粗车时,留有一定的精 车余量。 4.精车时,必须选用试车的方法进行,如,精车余量为0.5?时。进 刀量,不要一次将余量车去,可第一次车去0.35,0.4?,车去一 小段后,停下测量再将多余的余量车去。这样能更好的保证尺寸的 准确性。 三、形位精度的控制方法 1.加工路线正确的选择。 2.选择正确的装夹方法。 3.精加工与粗加工余量留有适当。不能太少。 4.轴类零件一般选择两顶的方法进行精加工的装夹方法。 一、技能训练任务 1.技能训练用图 -building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil26cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr ?0.012 1.5 Tr32×12(P6) 30 ?38103315 106106 实训要求, 1、 选用正确的装夹方法。 2、 选用合理的加工工艺。 3、 将精车与粗车分开,注意加工余量控制。 实训效果, 学会了怎样控制尺寸精度,选用合理的装夹方法。 教学反思, 通过加工练习能正确的掌握精加工与粗加工的方法。基本上能正确的选用合理的装夹方法,确保零件的形位加工精度。 第十节,典型零件的加工练习 培训时间,7.9 授课人,朱长生 一、技能训练任务 1.技能训练用图 the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex27es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not 全部× ′ 2.工艺分析 ,1,备料为Ø30×95? ,2,工件为典型的圆锥轴类工件。 ,3,外圆尺寸精度的要求较高,形位精度没有要求。 ,4,外圆锥角度比较大。 ,5,加工装夹方法可以选择调头的方式进行加工。 ,6,加工时,应先加工工件的右端的台阶各部尺寸精度。然后调头 定长,再加工外圆锥左端台阶。 实训要求, 1、 保证外圆尺寸精度公差。 2、 调头时应先定整长。再加工其他尺寸。 3、 加工尺寸控制是整个零件的关键。 实训效果, Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil28cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and- 掌握了加工方法。尺寸精度的控制,不稳定,时好时坏。 教学反思, 加强练习轴类零件的加工,主要加强外圆尺寸精度的控制。 第十一节,螺纹的加工练习 培训时间,7.16 授课人,朱长生 一、相关知识 螺纹加工是个。要求有比较熟练操作动作,同时要求掌握螺纹各部尺寸的计算知识。是综合性较强的加工方法。 1. 螺纹的车削原理与车削方法 车削原理 车螺纹时,当工件每转一周,车刀纵向位移量必须等于 所车螺纹的一个螺距(或导程)。 2. 车削方法 ? 直进法 它适用于低速车削螺距小于2?及脆性材料的螺纹,也适应于高速车削螺距大于2?的螺纹。 ? 左右切削法 适用于低速车削螺距大于2?的塑性材料的螺纹。 ? 斜进法,适用于低速车削大螺距的螺纹。 二、螺纹车刀 要车好螺纹,必须正确刃磨和安装螺纹车刀。按照工件的性质,螺纹车刀是成形刀具,因此对它有以下几点要求, -Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex29es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and 1、对螺纹车刀几何形状的要求 ? 车刀的刀尖角应该等于牙形角。如车削普通螺纹〔 三角形,时,车刀刀尖角应等于60?,见图2-3-50所示,车英制三角形螺纹时,刀尖角应等于55?,车公制梯形螺纹,刀尖用应等于30?。 ?车刀的径向前角γ应该等于零度。 ? 车刀后角因为螺旋升角的影响应该磨得不同。 车削螺纹时,车刀与工件的相对位置因受螺旋运动的影响,使车刀的工作前角和后角发生了变化,这对车削单头三角形螺纹影响不大,但在车削方牙、梯形、多头螺纹时影响就较大,见图23-51别所示。在切削右螺纹时, α1=,3?,5?,+τ ,2-3-11, α2=,3?,5?,-τ ,2-3-12, 式中 α1----车刀左侧的静止后角,刃磨后角, α2----车刀右侧的静止后角,刃磨后角, τ― 螺旋升角 ,3?,5?,-----工作后角 Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil30cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and- 由于螺旋运动的影响,切削时车刀的前角也发生了变化。见图2-3-52? 所示。如果静止时车刀前角γ=0?,切削右螺纹时,左刀刃上的工作前角为0?+τ,右刀刃上的工作前角为0?-τ。这时右刀刃上的工作前角为负值,切削很不顺利,排屑困难。为了改善切削条件,可将车刀法向,垂直于螺旋线,安装,这时两侧刀刃工作前角都为0?,见图2-3-52 ? 所示,,或在车刀两刀刃磨有较大的前角,见图2-3-52 ? 所示,或法向装刀并磨有前角,见图2-3-52?所示。 ?除车削滚珠形螺纹外,车刀的左右刀刃必须是直线。 培训时间, 7.23 授课人,朱长生 实际工作中,当用高速钢车刀低速车螺纹时,如果采用径向前角γ等于零度的车刀见图,切屑排出困难,就很难把螺纹车光。这时可采用有5?,15?径向前角的螺纹车刀见图,便可比较顺利地进行切削,并可以减少积屑瘤现象,能车出表面粗糙度较低的螺纹。但是当车刀有了前角以后,牙形角就会产生变化,见图所示。同时刀刃不通过工件轴心线,因此被切削的螺纹牙形,轴向剖面,不是直线而是曲线。 -, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex31es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city 这种误差对一般要求不高螺纹来说,可以忽略不计。但对牙形角的影响不可忽略,特别是具有较大径向前角的螺纹车刀,其刀尖角必须进行修正,或者粗车螺纹时采用有径向前角的车刀,而精车时采用径向前角为零度的车刀。从图中可看出,具有前角γ的车刀,其刀尖角必须小于前角等于零度时的刀尖角ε,才能车出牙形为α的角度。 三、技能训练任务 1、技能训练用图 M30×2 实训要求, 1、正确的刃磨普通螺纹车刀,并保证牙形角的正确。 2、按图样要求,正确的调整机床手柄,并检验手柄位置是否正确。 3、合理的选择切削用量。按图样要求加工M30×2的普通螺纹。 4、保证外圆尺寸精度的加工。 实训效果, 能按要求调整机床手柄。基本能刃磨螺纹刀具。大部分学生掌 cities in building with an area of about 76.2km2. From city-nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil32cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town- 握了普通螺纹的加工方法。 教学反思, 螺纹刀具的刃磨有待加强,螺纹尺寸的控制,应加强练习掌握。 第十二节,梯形螺纹的练习 培训时间, 7.30 授课人,朱长生 一、相关知识 在圆柱或圆锥母体表面上制出的螺旋线形的、具有特定截面的连续凸起部分。螺纹按其母体形状分为圆柱螺纹和圆锥螺纹,按其在母体所处位置分为外螺纹、内螺纹,按其截面形状,牙型,分为三角形螺纹、矩形螺纹、梯形螺纹、锯齿形螺纹及其他特殊形状螺纹,三角形螺纹主要用于联接,矩形、梯形和锯齿形螺纹主要用于传动,按螺旋线方向分为左旋螺纹和右旋螺纹,一般用右旋螺纹,按螺旋线的数量分为单线螺纹、双线螺纹及多线螺纹,联接用的多为单线,传动用的采用双线或多线,按牙的大小分为粗牙螺纹和细牙螺纹等,按使用场合和功能不同,可分为紧固螺纹、管螺纹、传动螺纹、专用螺纹等。 车螺纹时,为了保证齿形正确,车刀的安装一定要正确。若装刀有偏差,即使车刀的刀尖角刃磨的十分准确,加工后的螺纹牙形仍全产生误差。对于三角形螺纹、梯形螺纹,它的齿形要求对称和垂直于工作轴线,即两半角相等。装刀时可用样板来对刀,如果把车刀装歪,就会产生齿形歪斜。此外,袋刀时刀尖必须对准工件中心。否则 -, and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex33es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city 会引起车刀前角的变化。在精车或半精车螺纹时,由于切削力通过车刀作用在拖板上使其配合间隙压缩,另方面由于车刀的反作用力而使工件及主抽位置稍有抬高,遇此情况时,为抵消这种偏差,安装车刀应使刀尖位置比工件中心高出1 / 100 D ,D,被加工工件的直径,,从而使车削时刀尖的实际位置对准工作中心。 二、车螺纹的调整 为了在车床上车出螺距合乎要求的螺纹,车削时必须保证工件,主轴,转一转,车刀纵向移力的距离等于工件一个螺距值。这就是说,若所车螺纹的螺距和车床丝杠的螺距已经确定,即车床主轴和丝杠必须保证一定的转速比。在现在生产的普通车床中,这个速比关系在设计进给箱和挂轮架时大都考虑进去了,只要查一下标牌就可以知道,按标牌上的要求变换机床手柄位置,并通过试车检查螺纹的刻线是否与要求的相同。 三、技能训练任务 1、技能训练用图 nd spatial structure of typical zonal group, 2012ns, a3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45. Valley, pingba small fragmented nature picture for "water-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-ure 2.13 GDP growth fig-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hchangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent higstry, s liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing indue Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city'integrated energy, chemicals and textil34cities have been expanding, centripetal city traffic organization has not changed, g for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of cities,ountinrmed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate accg, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not been fothe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgradin-building situation, "old town-cities in building with an area of about 76.2km2. From city-patial structure of typical zonal group, 2012and spingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitations, the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.3%, Valley, pingba small fragmented nature picture for "water and-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-2.13 GDP growth figure -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-gning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent high, chanquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industrybin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's liile Yiies, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and textnting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citaccou n formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequateading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beethe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgr-building situation, "old town-cities in building with an area of about 76.2km2. From city- ×5 放大 放大 1、 按图加工梯形螺纹工件。 2、 正确的刃磨和安装梯形螺纹车刀。 3、 梯形螺纹部分可分粗车和精车两步进行。 , and spatial structure of typical zonal group, 2012tions45.3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limita ter and the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hillsValley, pingba small fragmented nature picture for "wa-and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-figure 2.13 GDP growth -yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-highy, changning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent ndustrty's liquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing itile Yibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the ciintegrated energy, chemicals and tex35es, cities have been expanding, centripetal city traffic organization has not changed,ting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of citiccounformed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequate a ding, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not beenthe South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and upgra-building situation, "old town-cities in building with an area of about 76.2km2. From city-d spatial structure of typical zonal group, 2012ns, an3%, pingba only 8.1%. 2.1.5 development of Yibin landscapes and distinctive feature in the center of the city, with limitatioand the second land of the seven hills". 236 meters to 2000 meters above sea level in the city, low mountain, 46.6% hills 45.Valley, pingba small fragmented nature picture for "water -and-Eastern State. Low mountains and hills in the city landscape as the main ridge-4 Yibin, Yibin city, Yibin city, fiscal revenue growth 2.1.4 topography terrain overall is Southwest, North-re 2.13 GDP growth figu-yield wells and pipelines in the first section, the lead in factory production and supply to the population. 2.1-hangning district, shale gas production capacity reached 277 million cubic metres, built the country's first independent highry, cliquor industry slip to stabilise. Promoting deep development of integrated energy, advanced equipment manufacturing industYibin city, are the three core pillars of the industry. In 2014, the wuliangye brand value to 73.58 billion yuan, the city's extilecities, cities have been expanding, centripetal city traffic organization has not changed, integrated energy, chemicals and tcounting for city development, "suspicious" pattern could not be formed. As regards transport, with the outward expansion of ate acbeen formed, functions of the service area space is missing. Meanwhile, peripheral group centres service was weak and inadequpgrading, quality public service resources are still heavily concentrated in the old town together. Southbank Centre has not the South Bank" Center construction is lagging behind, disintegration of the old city is slow, optimization and u-building situation, "old town-cities in building with an area of about 76.2km2. From city-