ativetotheworkpiece,andthemechanicalenergyissuppliedthroughthetool.Thefinalgeometryisthusdeterminedfromthegeometryofthetoolandthepattemofmotionsofthetoolandtheworkpiece.Thebasicprocessismechanical:actually,binedwithfracture.Asmentionedpreviously,theunwantedmaterialinmetal-cuttingprocessesisremovedbyarigidcuttingtool,sothatthedesiredgeometry,tolerances,andsurfacefinishareobtained.Examplesofprocessesinthisgroupareturning,drilling,reaming,milling,shaping,planing,broaching,grinding,honing,andlapping.Mostofthecuttingormachiningprocessesarebasedonatw,dimensionalsurfacecreation,whichmeansthattworelativemotionsarenecessarybetweenthecuttingtoolandtheworkmaterial.Thesemotionsaredefinedastheprimarymotion,whichmainlydeterminesthecuttingspeed,andthefeedmotion,whichprovidesthecuttingzonewithnewmaterial.
全文预览