压花(knurl)

DORIANTOOLINT'LP.O.BOX770785HOUSTON,TX772151-800-627-0266713-341-5267409-282-2861FAX:409-282-2951®DiametralKnurlingInformationStandardDiametralPitchesForExample:Increasingtheanglebetweentheknurlaxistoapproximately301/4°wouldprovidegoodtrackingoftheknurlandmakeitpossibletoobtainaneven83teethinsteadof83.14.Byreducingthediameteroftheworkblanktoadecimalsize,goodtrackingoftheknurlcanbeobtainedfor30°diagonalknurlingaccordingtothefollowingformula:Thenumberofteethproducedontheworkblankismeasuredinthetransverseplaneandmaybedeterminedwiththefollowingformulafordiagonalknurling.Nw=DwxPxcos¥DwNwP=EquivalentNormalTPIofDimetralPitchKnurlsAllDiametralPitchKnurlsmadetoAmericanStandards(ASAB5.301958).DiametralPitchKnurlsproducetheD.P.numberofteethperinchofdiameter.RolledCircularPitchKnurls,producetheTPInumberofteethperinchofcircumferencemeasurednormaltotheteeth.WorkBlankDiametersP=DiametralPitchWhere:Nw=Numberofteethonwork,orPxDwNwDw=TheoreticalworkblankdiameterorP¥=Anglebetweenknurlaxisandworkaxis.(cos30°=.86603)8396x.86603NwPxcos¥Dw=.998inch==Thetoleranceforworkblankdiametersvarywiththeknurlingrequirements.Forgeneralpurposeknurlingthetolerancesgenerallyrangebetween5to8%ofthecircularpitchandforpreciseknurling,approximately2to4%ofthecircularpitch.RequestforDiametralBlankDiametersThefourstandarddiametralpitchesavailableare64,96,128,and160.The96and160diametralpitchesareforblankdiametershavingfractionalincrementsof1/32"andthe64and128diametralpitchesareforblankdiametershavingfractionaldiametersof1/64".TheAmericanStandardrecommendsthattheuseofthe64diametralpitchshouldbeavoidedasmuchaspossible,andforsimplificationoftools,preferencebegiventotheuseof96diametralpitch.Thetermdiametralpitchappliestothequotientofthetotalnumberofteethinthecircumferenceoftheworkdividedbythebasicdiameteroftheworkblank.Thediametralpitchistheratioofthenumberofteethontheworktothenumberofinchesofbasicworkblankdiameterandequalsthenumberofteethtoeachinchofbasicblankdiameter.ApproximateIncreaseofBlankDiameterStraightandDiagonalAmericanStandard**ReferstotransverseTPIandtransversecircularpitchondiagonalknurling.Thediametralpitchandthenumberofteetharealwaysmeasuredinatransverseplanewhichisperpendiculartotheaxisofrotationfordiagonalaswellasstraightknurling.Acomparisonofdiametralpitches,TPI,andcircularpitchesisshownbelow.Diagonalanddiamondknurlingonworkblankmaybeaccomplishedbysettingtheaxisofstraightknurlsatanangletotheworkaxis.Whenusingstraightknurlstoproducediagonalanddiamondknurlingbyend-feeding,thetransversediametralpitchthatisproducedontheworkwillnotbethesameasthatoftheknurl.Thediametralpitchinsuchinstancesreferstothediametralpitchontheknurlratherthantheknurlingproducedonthework.Where:P=DiametralPitchDw=TheoreticalworkblankdiameterorNw=Numberofteethonwork,orPxDwNwPxcos¥PNwForend-feedknurlingwithstraighttoothknurls:Dw=Dw=Where:P=DiametralPitchNw=Numberofteethonwork,orPxDwNwDw=TheoreticalworkblankdiameterorPP=DiametralPitchWhere:Nw=Numberofteethonwork,orPxDwNwDw=TheoreticalworkblankdiameterorP¥=Anglebetweenknurlaxisandworkaxis.(cos30°=.86603)Theformulafortheoreticalworkblankdiametersareasfollows:If30°diagonalknurlingweretobeproducedon1"stockwitha96diametralpitchstraightknurl.Nw=1.000x96x.86603=83.14teethNote:.86603equalscosineof30°NwPlartemaiDhctiPhteeT**hcnIreP.xorppAralucriC**hctiPfohtpeD.xorppAniesaercnIrohtooTretemaiDdelrunKhteeTfo.oN.niMdelrunKniecnerefmucriCknalBkroWsretemaiDthgiartSlanogaiDegnaRretemaiDstnemercnI464.021940.420.120.421-8/346/1696.037230.610.410.421-4/123/18217.045420.210.010.811-46/946/10619.056910.900.800.511-23/323/1lartemaiDhctiPralucriChctiP)IPT(hcnIrePhteeTthgiartSlanogaiD°03461940.4.026.32697230.6.033.538215420.7.040.740616910.9.058.85B-XIV