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1、桂林電子科技大學(xué)畢業(yè)設(shè)計(jì)（論文）報(bào)告用紙第29頁共29頁編號：畢業(yè)設(shè)計(jì)(論文)外文翻譯（原文）學(xué)院：機(jī)電工程學(xué)院專業(yè)：機(jī)械設(shè)計(jì)制造及其自動化學(xué)生姓名：趙盛偉學(xué)號：0801120319指導(dǎo)教師單位：桂林航天工業(yè)學(xué)院姓名：梁偉職稱：高級工程師2012年5月15日桂林電子科技大學(xué)畢業(yè)設(shè)計(jì)（論文）報(bào)告用紙第29頁共29頁CNCLATHELessons1ComponentsofModernCNCLathesTheCNClatheismachinetoolthatcanremovematerialfromwork-piece,whichisclampedandrotatedab
2、outanaxis.Thismachinetoolisusedprimarilyforproducingsurfacesofrevolutionandflatedges.Ofallmetalcuttings,mostisdonewithasharpsingle-pointcuttingtool.ModernCNClathesuseturretstoholdcuttingtoolsrigidlyandmovecuttingtoolsaccurately.Theturretalsohasautomatictool-changingcapability;itisusedt
3、oquicklytakeanoldtooloutandanewtoolintoitscuttingposition.Afrontturretisbuilttomovetoolsfrombelowthespindlecenterlineuptothework.Arearturret,ontheotherhand,movestoolsfromabovethespindlecenterlinedowntothework.Therefore,machinesequippedwithfrontandrearturretscanexecutecuttingoperationsf
4、romaboveandbelowtheworksimultaneously.Lathesaremachinetoolsdesignedprimarilytodoturning,facingandboring,Verylittleturningisdoneonothertypesofmachinetools,andnonecandoitwithequalfacility.Becauselathesalsocandodrillingandreaming,theirversatilitypermitsseveraloperationstobedonewithasingle
5、setupoftheworkpiece.Consequently,morelathesofvarioustypesareusedinmanufacturingthananyothermachinetool.Theessentialcomponentsofalathearethebed,headstockassembly,tailstockassembly,andtheleadscrewandfeedrod.Thebedisthebackboneofalathe.Itusuallyismadeofwellnormalizedoragedgrayornodularcas
6、tironandprovidessheavy,rigidframeonwhichalltheotherbasiccomponentsaremounted.Twosetsofparallel,longitudinalways,innerandouter,arecontainedonthebed,usuallyontheupperside.SomemakersuseaninvertedV-shapeforallfourways,whereasothersutilizeoneinvertedVandoneflatwayinoneorbothsets,Theyareprec
7、ision-machinedtoassureaccuracyofalignment.Onmostmodernlathesthewayaresurface-hardenedtoresistwearandabrasion,butprecautionshouldbetakeninoperatingalathetoassurethatthewaysarenotdamaged.Anyinaccuracyinthemusuallymeansthattheaccuracyoftheentirelatheisdestroyed.Theheadstockismountedinaf
