数控技术专业英语试卷数控10校外实习

密封线兰州工业高等专科学校2012～2013学年第1学期期末考试试卷科目专业英语考试班级数控10-1，2考试日期月日本试卷共3页题目一二三四五六七八九十十一总分分数一、TranslatethefollowingwordsintoChinese(本大题共20小题，每小题1分，共15分)1mechanism9faceplate2turret10counterweight3tap11runout4bed12carriage5tailstock13saddle6way14apron7transmission15stiffness8chuck二、TranslatethefollowingphrasesintoChinese(本大题共15小题，每小题1分，共15分)1controlpanel控制面板2machinepanel操作面板3CYCLESTART循环启动4FEEDHOLD进给保持5manualpulsegenerator(MPG)手摇脉冲发生器6toggleswitch拨动开关7SINGLEBLOCK单段8MACHINELOCK机床锁定9OPTIONALBLOCKSKIP跳过程序段10OPTIONALBLOCKSTOP计划停止11automatictoolchanger自动换刀装置12toolholder刀杆,刀柄13retentionknob拉钉14turrethead转塔头15carouselstorage鼓轮式刀库系主任签字：日期：教研室主任签字：日期：姓名班级学号第1页试卷袋号三、TranslatethefollowingsentencesintoChinese(本大题共70分)1.(20分)SafetyrulesforprogrammingCNClathesAlwayscheckforanyinterferencebetweentheworkpiece,thetoolingsetups,andtheindexingofeachturretface.Alwaysselectcutters,holders,andturretaccessoriesthatprovidemaximumrigidityforholdingduringmachining.Selectspeedsandfeedsthatpermitmachiningatoptimumefficiencyandsafety.Reducethespeedandfeed:Whendrillinglarge-diameterholestoadepthgreaterthantwicethedrillsize.WhencuttingthreadWhenfinishedcuttinganinternaltaper,alwaysfeedthetoolinthedirectionofthelargediameter.Duringroughturning,payattentiontothefollowing:Theeffectoflongitudinal,tangential,andradialforces.Theheatgeneratedbetweentheworkpieceandtool.2.(20分)CNClatheprogramscanbewrittentomovethetoolinthefollowingmodes:absolute,incremental,ormix(incrementalandabsolute)AbsolutepositioningWhenoperatinginthismodethenewpositionofthetoolisgivenbyitsXandZdistancesfromafixedhomeororigin(0,0).Diameterprogramming:Withabsolutediameterprogramming,theXpositionofthetoolisspecifiedintermsofdiameterortwicethedistancefromthespindlecenterline.IncrementalpositioningWhenoperatinginthismode,thenewpositionofthetoolisspecifiedbyinputtingitsdirectionanddistancefromthelastpositionachieved.TheaddressUisusedtoindicateincrementalX-axismotionandtheaddressWisusedtoindicateincrementalZ-axismovement.MotiontowardthespindlecenterlineontheX-axisisindicatedby–Uandmotionawayby+U.MotiontowardthespindlecenterontheZ-axisisindicatedby–Wandmotionawayby+W.Diameterprogramming:Withincrementaldiameterprogramming,Uisenteredasthedirectedchangeindiameterfromthelastpositionachieved.(20分)第2页3.(30分)Referencepoint(Machinezero)Thereferencepointormachinezeroisthepositionoftheturretwhenthemachine’saxesarezeroedout.Itissetoncebythemanufacturer.Itshouldbenotedthatthislocationinalsoreferredtoasthe“machinehome”position.Machiningorigin(Toolchangeposition)Themachiningoriginisdeterminedatsetup.Thislocationisinputatthebeginningofthewordaddressprogrambeforethefirsttoolchangeblockbymeansofthe“zero-offset”command.Themachineindexesthetoolsatthisposition.Themachiningoriginisdeterminedinsuchawaythatwhentheturretisatthislocationthelongesttoolisatleast1.0fromthefaceofthepartinthe‘Z’-directionand1.0fromthediameterofthestock.Thecontroliszeroedoutatthislocation.Theturretisthenjoggedtothereferencepoint.The‘X’and‘Z’locationsofthemachineoriginfromthereferencepointarerecorded,andthesenumberareusedinthe“zero-offset”command.(1)Thetoolchangepositionisasafelocationthemachinereturnstowhenindexinganoldtoolwithanewtool.Itisusuallysetatthemachiningorigin.Theoperatorcanmanuallyhometheturretbypressingthe“returntoreference”buttononthemachinepanel.Thiscanbedone,forexample,iftheturretisnothomedwhentheCNClatheisturnedon.ProgramzeroProgramzeroisapointfromwhichalldimensionsaredefinedinthepartprogram.Thesetuppersonusestooloffsetsasameansoflocatingtheprogramzerowithrespecttothemachiningorigin.UponreceivingaprogrammedXandZmovewithrespecttotheprogramzero,thecontrollerwillcomputethecorrespondingXandZmoverelativetothemachiningorigin.Itwillthenexecutethemoverelativetothemachiningorigin.第3页第7页兰州工业学院2012～2013学年第1学期期末考试试卷参考答案及评分标准科目专业英语考试班级数控10-1、2本答案编写人高成秀共1页一、TranslatethefollowingwordsintoChinese(本大题共15小题，每小题1分，共15分)mechanism机械装置,机构,faceplate花盘turret转塔刀架counterweight平衡锤tap攻螺纹runout振摆bed床身carriage托板tailstock尾架saddle床鞍way导轨apron托板箱transmission变速箱stiffness刚度chuck卡盘,夹盘二、TranslatethefollowingphrasesintoChinese(本大题共15小题，每小题1分，共15分)controlpanel控制面板machinepanel操作面板CYCLESTART循环启动FEEDHOLD进给保持manualpulsegenerator(MPG)手摇脉冲发生器toggleswitch拨动开关SINGLEBLOCK单段MACHINELOCK机床锁定OPTIONALBLOCKSKIP跳过程序段OPTIONALBLOCKSTOP计划停止automatictoolchanger自动换刀装置toolholder刀杆,刀柄retentionknob拉钉turrethead转塔头carouselstorage鼓轮式刀库三、TranslatethefollowingsentencesintoChinese(本大题共70分)略第1页