中英文翻译MILLING铣削-豆柴文库

中英文翻译MILLING铣削.pdf

2024-09-16

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MILLING铣削 Millingisabasicmachiningprocessinwhichthesurfaceisgeneratedbytheprogressiveformation andremovalofchipsofmaterialfromtheworkpieceasitis fedtoarotatingcutterinadirectionperpendiculartotheaxisofthecutter. Insomecasestheworkpieceisstationaryandthecutterisfedtothework.Inmost instancesamultiple-toothcutterisusedsothatthemetalremovalrateishigh,andfrequentlythedesired surfaceisobtainedinasinglepassofthework. Thetoolusedinmillingisknownasamillingcutter.Itusuallyconsistsof acylindricalbodywhichrotatesonitsaxisandcontainsequallyspacedperipheral teeththatintermittentlyengageandcuttheworkpiece.1Insomecasestheteethextendpartwayacrossone orbothEndsofthecylinder. Becausethemillingprincipleprovidesrapidmetalremovalandcanproducegood surfacefinish,itisparticularlywell-suitedformass-productionwork,andexcellentmillingmachines havebeendevelopedforthispurpose.However,veryaccurateandversatilemillingMachinesofa general-purposenaturealsohavebeen developedthatarewidelyusedinjobshopandtoolanddiework.Ashopthatisequippedwithamillingmach ineandanenginelathecanmachinealmostanytypeofproductofsuitablesize. TypesofMillingOperations.Millingoperationscanbeclassifiedintotwobroad categories,eachofwhichhasseveralvariations: 1.Inperipheralmillingasurfaceisgeneratedbyteethlocatedintheperiphery ofthecutterbody;thesurfaceisparallelwiththeaxisofrotationofthecutter. Bothflatandformedsurfacescanbeproducedbythismethod.Thecrosssectionoftheresultingsurface correspondstotheaxialcontourofthecutter.Thisprocedure ofteniscalledslabmilling. 2.Infacemillingthegeneratedflatsurfaceisatrightanglestothecutter axisandisthecombinedresultoftheactionsoftheportionsoftheteethlocated onboththeperipheryandthefaceofthecutter.2Themajorportionofthecutting isdonebytheperipheralportionsoftheteethwiththefaceportionsprovidingafinishingaction. ThebasicconceptsofperipheralandfacemillingareillustratedinFig.16-1.Peripheralmilling operationsusuallyareperformedonmachineshavinghorizontalspindles,whe

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