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专业英语.doc

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专业英语.doc

1一、专业术语英汉互译(每小题1分,共36分)1.multipointtool2.nationalstandard3.toolwear4.leadscrew5.enginelathe6.MEMS7.bilateraltolerance8.cathode9.fragilematerial10.compoundrest11.twistdrill12.specialpurposefixture13.abrasivegrains14.lowerdeviations15.toolsettingelement16.tolerancezone17.positiveallowance18.interchangeability19.rejectrates20.internalturning21.rackandpinion22.machinetool23.spurgear24.manipulatedvariable25.特种加工工艺26.残余应力27.电火花加工28.过盈配合29.基孔制30.自由度31.齿轮传动32.一级减速33.闭环控制34.伺服机构35.分辨率36.数字信号二、单句英汉互译(每小题4分,共40分)1.Mediumcarbonsteelisgenerallyusedinapplicationsrequiringhigherstrengththanisavailableinlowcarbonsteels,suchasinmachinery,inautomotiveandagriculturalequipmentpartsgears,axles,connectingrods,crankshafts,inrailroadequipment,andinpartsformetalworkingmachinery.2.Inturning,aworkpieceisrotatedaboutitsaxisassinglepointcuttingtoolsarefedintoit,shearingawayexcessmaterialandcreatingthedesiredcylindricalsurface.3.Inchemicalmachining,materialisremovedfromselectedareasofworkpiecebyimmersingitinachemicalreagentsoretchants,suchasacidsandalkaline2solutions.4.Howmatingpartsorassembliesfittogetherwithcomponentpartsisreferredtoasfit,whichincludesclearancefit,interferencefit,ortransitionfit,seeFig.7.3.5.Jigsarerarelyclampedonthemachinetablebecauseitisnecessarytomovethejigonthetabletoalignthevariousbushinginthejigwiththemachinespindle.6.Thesimplestarrangementofspurgearsisasinglepairofgearscalledasinglereductionstage,whereoutputrotationisinadirectionoppositethatoftheinput.7.Intheopenloopcontrolsystem,notonlyarethevaluesoftheparametersofaprocessoftennotpreciselyknown,buttheymayalsochangegreatlywithoperatingconditions.8.Atransducerisadevicewhichconvertsthequantitybeingmeasuredintoanoptical,mechanical,ormorecommonlyelectricalsignal.9.不必要的紧公差会导致由于昂贵的制造方法和较高的废品率所带来的高的制造成本。10.齿轮传动系统主要用于工业设备如机床、汽车、工程机械、农业机械以及建筑机械。三、根据英文意思选择合适的单词或词组(每小题2分,共10分)1.Apressisusedtoboreholesintoaworkpiece.2.Aisarandompointcuttingtoolwhichusesabrasivesintheshapeofawheel,bondedtoabelt,astickorsimplysuspendedinliquid.3.Aholdstheworkpieceandrotatesit,andthesharpenededgeofatoolcutsandremovesmaterial.4.isarelativelysimplecuttingoperationwhichflatssurface.5.Aisversatilemachinetoolwhichisusefulformachiningtherough3surfaceofaworkpieceflatandsmoothandforshapingthemwithslots.AplanningBmillingmachineClatheDgrindingmachineEleadscrewFbandsawGdrill四、文献段落翻译(14分)Processplanningrepresentsthelinkbetweenengineeringdesignandshopfloormanufacturing.Itisconcernedwithselectingmethodsofproductiontooling,fixtures,machinery,sequenceofoperations,andassembly.Allofthesediverseactivitiesmustbeplanned,whichtraditionallyhasbeendonebyprocessplanners.Thesequenceofprocessesandoperationstobeperformed,themachinestobeused,thestandardtimeforeachoperation,andsimilarinformationallaredocumentedonaroutingsheet.Whendonemanually,thistaskishighlylaborintensiveandtimeconsumingandreliesheavilyontheexperienceoftheprocessplanner.Modernpracticeinroutingsheetsistostoretherelevantdataincomputersandaffixabarcodeorotheridentificationtothepart.InordertoshortenthegapbetweenCADandCAM,manycomputerizedprocessplanningapproacheshavebeendevelopedtoaccomplishthetaskofprocessplanninginthepastdecades.TheseapproachesareknownascomputeraidedprocessplanningCAPP.WiththehelpofCAPP,betterandfasterprocessplanscanbegenerated.CAPPcanbeclassifiedintothreecategoriesindexed(检索式)CAPP,variantCAPPandgenerativeCAPP.Eachapproachisappropriateundercertainconditions.

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