外文翻译-- 车床及其切削加工.doc

毕业设计论文外文资料翻译系别机电信息系专业机械设计制造及其自动化班级姓名学号外文出处PNEUMATICTIPSNO87/1994附件1原文；2译文2013年3月11原文LATHESANDIT’SCUTTINGPROCESSLATHESAREMACHINETOOLSDESIGNEDPRIMARILYTODOTURNING,FACING,ANDBORINGVERYLITTLETURNINGISDONEONOTHERTYPESOFMACHINETOOLS,ANDNONECANDOITWITHEQUALFACILITYBECAUSELATHESALSOCANDODRILLINGANDREAMING,THEIRVERSATILITYPERMITSSEVERALOPERATIONSTOBEDONEWITHASINGLESETUPOFTHEWORKPIECECONSEQUENTLY,MORELATHESOFVARIOUSTYPESAREUSEDINMANUFACTURINGTHANANYOTHERMACHINETOOLTHEESSENTIALCOMPONENTSOFALATHEARETHEBED,HEADSTOCKASSEMBLY,TAILSTOCKASSEMBLY,CARRIAGEASSEMBLY,ANDTHELEADSCREWANDFEEDRODTHEBEDISTHEBACKBONEOFALATHEITUSUALLYISMADEOFWELLNORMALIZEDORAGEDGRAYORNODULARCASTIRONANDPROVIDESAHEAVY,RIGIDFRAMEONWHICHALLTHEOTHERBASICCOMPONENTSAREMOUNTEDTWOSETSOFPARALLEL,LONGITUDINALWAYS,INNERANDOUTER,ARECONTAINEDONTHEBED,USUALLYONTHEUPPERSIDESOMEMAKERSUSEANINVERTEDVSHAPEFORALLFOURWAYS,WHEREASOTHERSUTILIZEONEINVERTEDVANDONEFIATWAYINONEORBOTHSETSTHEYAREPRECISIONMACHINEDTOASSUREACCURACYOFALIGNMENTONMOSTMODEMLATHESTHEW