山特维克刀具培训九.pdf

《山特维克刀具培训九.pdf》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、ATheoryGeneralturningoperationsTurningTurningisthecombinationoftwomovements–rotationofBtheworkpieceandfeedmovementofthetool.Thefeedmovementofthetoolcanbealongtheaxisoftheworkpiece,whichmeansthediameterofthepartwillbeturneddowntoasmallersize.Alternatively,thetoolca

2、nbefedtowardsthecentre(facingoff),attheendofPartingandgroovingthepart.COftenfeedsarecombinationsofthesetwodirections,resultingintaperedorcurvedsurfaces.ThreadingDTurningandfacingasaxialandradialtoolmovements.MillingEDrillingFBoringThreecommonturningoperations:G-Lo

3、ngitudinalturning-Facing-Profiling.ToolholdingHA4MachinabilityOtherinformationATheoryDefinitionsoftermsTurningSpindlespeedBn(rpm)Thespindlespeedrpm(revolutionperminute)istherotationofthechuckandworkpiece.PartingandgroovingCCuttingspeedThreadingDThecuttingspeedisth

4、esurfacespeed,m/min,atwhichthetoolmovesalongthev(m/min)workpieceinmetresperminutecMillingEDefinitionofcuttingspeednThedefinitionofcuttingspeedastheresultDrillingofthediameter,pi(π)andspindlespeedinFrevolutionsperminute(rpm).Thecircumfer-ence(C)isthedistancethecutt

5、ingedgemovesinarevolution.CBoringvc=cuttingspeed(m/min)GDm=machineddiameter(mm)n=spindlespeed(rpm)Circumference,C=πxDm(mm)Toolholdingπ×Dm×nHvm/minc=1000A5MachinabilityOtherinformationATheoryCalculationofthecircumference•Circumference=πxdiameter(mm)Turning•π(pi)=3.

6、14BExample:PartingandgroovingDm2=100mmCCircumference=3.14x100=314mmDm1=50mmThreadingCircumference=3.14x50=157mmDExampleofcuttingspeeddifferationsMillingEThecuttingspeeddiffersdependingontheworkpiecediameter.Given:Spindlespeed,n=2000rpmDrillingDiameter,Dm1=50mmFDia

7、meter,Dm2=80mmπ×Dm×nvc=m/minBoring1000G3.14×50×2000vc1==314m/min1000Toolholding3.14×80×2000Hvc2==502m/min1000A6MachinabilityOtherinformationATheoryDefinitionsoftermsSpindlespeedTurningTheworkpiecerotatesinthelathe,withacertainspindlespeed(n),atacertainBnumberofrev

8、olutionsperminute(rpm).Surface/cuttingspeedPartingandgroovingThecuttingspeed(vc)inm/minatwhichtheperipheryofthecutworkpiecediam-Ceterpassesthecuttingedg