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MillingandMillingCutter

铣削和铣刀

Millingisamachiningprocessthatiscarriedoutbymeans

ofamultiedgerotatingtoolknownasamillingcutter.

铣削是采用被称为铣刀的多刃旋转刀具完成的机加工作业。

Inthisprocess,metalremovalisachievedthroughcombining

therotarymotionofthemillingcutterandlinearmotionsofthe

workpiecesimultaneously.Millingoperationsareemployed

inproducingflat,contouredandhelicalsurfacesaswellasfor

thread-andgear-cuttingoperation.

在此工艺中金属去除是通过铣刀的旋转运动和工件的直线运动的

组合实现的。铣削作业既可用于生成平面、轮廓面和螺旋面也可用于

切削螺纹和齿轮。

Eachofthecuttingedgesofamillingcutteractsasan

individualsingle-pointcutterwhenitengageswiththeworkpiece

metal.Therefore,eachofthosecuttingedgeshas

appropriaterakeandreliefangles.

在铣刀切削工件金属时铣刀的每条切削刃都象一单独的单刃刀具

一样作用。所以每条切削刃都适当的前后角。

Sinceonlyafewofthecuttingedgesareengagedwiththe

workpieceatatime,heavycutscanbetakenwithoutadversely

affectingthetoollife.Infact,thepermissiblecuttingspeeds

andfeedsformillingarethreetofourtimeshigherthanthosefor

turningordrilling.

有不利影响的情况下承担重型切削。事实上铣削允许的切削速度和进

给比车削或钻削高三到四倍。

Moreover,thequalityofthesurfacesmachinedbymillingis

generallysuperiortothequalityofsurfacesmachinedbyturning,

shaping,ordrilling.

此外,由铣削加工的表面质量通常优于车削、刨削或钻削加工的表

面质量。

Awidevarietyofmillingcuttersisavailableinindustry.This,

togetherwiththefactthatamillingmachineisaveryversatile

machinetool,makesthemillingmachinethebackboneof

amachiningworkshop.

工业上可采用的铣刀类型众多。连同铣床是极通用机床的事实使

得铣床成为机加工车间的支柱。

Asfarasthedirectionofcutterrotationandworkpiecefeed

areconcerned,millingisperformedbyeitheroft