第1題Inmachining,theprocessofdirectlychangingtheshape,size,andsurfacequalityofrawmaterialsorblankstobecomethedesiredpartiscalled().AProductionprocessBTechnologicalprocessCTechnologicalregulationDMachiningprocess第2題Thepartofthetechnologicalprocessthatone(oragroupof)worker()completescontinuouslyononemachinetool(orotherequipmentandworkstation)forone(orsimultaneouslyforseveral)workpiecesiscalleda().AOperationBProcessCWorkstationDToolpass第3題Theprimaryuseofthemachiningprocesscardis().AToprovidespecificguidanceforworkeroperationsBToformulateproductionplansCForproductionorganizationandmanagementDForproductiontechnologypreparation第4題Afteraworkpieceisclampedonce,eachmachiningpositionitoccupiesrelativetothemachinetoolorcuttingtooliscalleda().AOperationBProcessCWorkstationDToolpass第5題Anoperationreferstothepartoftheprocesscompletedundertheconditionthat()doesnotchange.AToolangleBMachiningsurfaceCMachiningtoolDCuttingspeedandfeedrate第6題Thebasisfordividingaprocessis().AWorkingtimeBNumberofworkpiecesCWhethertheworklocationchangesandwhethertheworkprocessiscontinuousDTypeofmachine第7題Completingthefacing,outerdiameterturning,reliefgroovecutting,threading,andpartingoffonalatheconstitutes().AOneoperationBTwooperationsCThreeoperationsDFouroperations第8題

Aprocessisthebasicunitthatmakesupthetechnologicalprocess.

(?

)第9題Insingle-pieceandsmall-batchproduction,themachiningprocesscardisgenerallyusedtoguideproduction.()第10題Nooneisallowedtoarbitrarilychangethetechnologicalprocessandmachiningmethodsspecifiedinthetechnologicalregulationduringproduction.()第11題Toensurethestabilityoftheworkpieceinstallationduringmachining,somecastingblanksrequireprocessallowancestobecast,whichshouldberemovedafterthepartismachined.()第12題Completingthemachiningofmultiplesurfacesinoneinstallationmakesiteasiertoensurethepositionalaccuracybetweeneachsurface.()第13題Duetochangesinprocessingequipment,evenifmachiningisdoneonthesamemachine,itwillbedividedintodifferentoperations.()第14題Anoperationcanincludemultiplesurfacesandvariousmachiningmethods,aslongastheelementsoftheoperationremainunchanged,itbelongstothesameoperation.()第15題Operationsandstepsarethesameconceptandcanbeusedinterchangeably.()第16題Inthemachiningprocess,theworklocationandthecontinuityoftheworkprocessarekeyfactorsindividingoperations.():.Whendividingoperations,itisnecessarytoconsiderdifferentproductionscalesandprocessingconditions.();.Inmassproduction,thedivisionofoperationsisoftenmoredetailedthaninsmallbatchproduction.()第1題Usinganunmachinedsurfaceasthepositioningreferencesurfaceiscalled().APositioningreferenceBAuxiliaryreferenceCRoughreferenceDFinishreference第2題Thedimensionalreferenceusedinprocessdocumentstospecifythepositionofthemachinedsurfaceiscalled().AProcessreferenceBTechnologicalreferenceCMeasurementreferenceDPositioningreference第3題Whengrindingtheguiderailsurfacesofalathe,themachiningallowanceshouldbeassmallanduniformaspossible.Therefore,theselectionofthefinishreferenceshouldconformtothe().APrincipleofunifiedreferenceBPrincipleofcoincidentreferenceCPrincipleofmutualreferenceDPrincipleofself-reference第4題Intheprocessdiagram,thereferenceusedtodeterminethedimensions,shape,andpositionofthemachinedsurfaceinthisprocessis(

).ADesign

referenceBProcess

referenceCPositioningreferenceDMeasurementreference第5題Forapartrequiringheattreatment,thereasonableprocessingsequenceis().AHeattreatmentfirst,thenroughmachiningBFinishmachiningfirst,thenheattreatmentCRoughmachiningfirst,thenheattreatment,thenfinishmachiningDHeattreatmentfirst,thenfinishmachining,thenroughmachining第6題Whenmachiningapartrequiringmillinganddrilling,thereasonableprocessingsequenceis().AMillingfirst,thendrillingBDrillingfirst,thenmillingCDrillingsmallholesfirst,thenmilling,thenreamingDMillingfirst,thenreaming第7題Whenroughmachining,themachiningallowanceshouldbe().AKepttoaminimumBSlightlylargerthanthefinishingallowanceCKeptconstantDNotconsidered第8題Selectinglargermachiningallowancesduringmachiningmayresultin().AIncreasedmachiningefficiencyBIncreasedmaterialwasteCReducedmachinetoolwearDImprovedsurfacequality第9題Atoosmallmachiningallowancemayresultin().AWorkpiecedeformationBTooldamageCWorkpiecescrapDExtendedmachiningtime第10題Theindirectlyobtaineddimensioninaprocessdimensionchainiscalled().AComponentlinkBClosedlinkCAdditivelinkDSubtractivelink第11題Whenusingtheextremevaluemethodtocalculatealineardimensionchain,thelowerdeviationoftheclosedlinkequals().AThesumoftheupperdeviationsoftheadditivelinksminusthesumoftheupperdeviationsofthesubtractivelinksBThesumoftheupperdeviationsoftheadditivelinksminusthesumofthelowerdeviationsofthesubtractivelinksCThesumofthelowerdeviationsoftheadditivelinksminusthesumoftheupperdeviationsofthesubtractivelinksDThesumofthelowerdeviationsoftheadditivelinksminusthesumofthelowerdeviationsofthesubtractivelinks第12題Aroughreferencecanbeusedrepeatedlyinthesamedimensionaldirection.()第13題Aroughreferenceisusedforroughmachining,whileafinishreferenceisusedforfinishmachining.()第14題Whenthereisaconflictbetweentheprinciplesofcoincidentreferenceandunifiedreference,theprincipleofunifiedreferenceshouldbefollowedforsurfacesrequiringhighdimensionalaccuracy.()第15題Ifasurfaceonapartdoesnotneedmachining,positioningbasedonthisunmachinedsurfacecanensurethattheunmachinedandmachinedsurfacesmaintaincorrectrelativepositions.()第16題Intheprinciplesofselectingafinishreference,the"principleofcoincidentreference"meansthatthetechnologicalreferencecoincideswiththedesignreference.()第17題Whenpreparingprocesscards,itisnecessarytofollowtheprincipleofroughingandfinishingseparately,withroughingfirstandfinishinglater.()第18題Dispersedprocessesrequiremoreequipmentandextensiveproductionpreparation.()第19題Annealingandnormalizing,aspreparatoryheattreatments,areusuallyarrangedafterblankmanufacturingandbeforeroughmachining.()第20題Quenchingisgenerallyarrangedbeforegrinding.()第21題Inactualmachining,whenbatchproducingshaft-typeparts,thefirstmachiningoperationisusuallymillingbothendfacesanddrillingthecenterhole.()第22題Thesequenceofroughmachiningandfinishingcanbereversedwithoutaffectingthefinalqualityofthepart.()Unit3Practice第1題Theprimaryfunctionsofshaftpartsdonotinclude().ASupportingtransmissionpartsBClampingworkpiecesCTransmittingtorqueDIncreasingcuttingspeed第2題Whichofthefollowingisnotaclassificationofshaftparts?()ASmoothshaftBSteppedshaftCHollowshaftDDisc第3題Whichofthefollowingisnotcommonlyusedinexternalcylindricalgrinding?()AAxialgrindingmethodBRadialgrindingmethodCTransversegrindingmethodDCuttinggrindingmethod第4題Duringturning,whatisthemainmovementoftheworkpiece?()ARotationalmovementofthetoolBFeedmovementofthetoolCRotationalmovementoftheworkpieceDTransversemovementoftheworkpiece第5題Whattypeofpartsisdiamondturningoftenusedforthefinalmachiningof?()ASteelandaluminumpartsBNon-ferrousmetalalloysandcastironpartsCPlasticandwoodenpartsDCeramicandglassparts第6題Rollingprocessingchangesthesurfacepropertiesoftheworkpiecethrough().AChemicalreactionsBHeattreatmentCPlasticdeformationDMechanicalcutting第7題Theblankforashaftcanbeselectedfrombarstock,forgings,orcastings,dependingonitspurposeandrequirements.()第8題Theblankforamachinetoolspindleisgenerallyacasting.()第9題Turningissuitableforallmetalmaterialsbutnotfornon-metalmaterials.()第10題ThesurfaceroughnessofaworkpieceafterexternalcylindricalgrindingcangenerallyreachRa0.2to0.8μm.()第11題Grindingcanachieveveryhighdimensionalaccuracywithoutgeneratingcuttingforceandcuttingheat.()第12題Therotationalaccuracyofthegrindingmachinehaslittleimpactonthequalityofhigh-precisiongrinding.()Unit4Practice第1題Themainfunctionsofsleevepartsdonotinclude().AProvidingsupportBGuidingCBearingradialandaxialloadsDIncreasingcuttingspeed第2題Inmassproduction,theblanksforsleevepartsareusually().AHot-rolledbarsBSeamlesssteeltubesCColdextrusionandpowdermetallurgyDSolidcastings第3題Whichofthefollowingmachiningmethodsisnotaroughorsemi-finishmachiningmethodforholes?()ADrillingBReamingCBoringDHoning第4題Whichofthefollowingmachiningmethodsisnotaholefinishingmethod?()AHoningBReamingCGrindingDBurnishing第5題Forlargediameterholes(D>80mm),theonlysuitablemachiningmethodis().ABoringBDrillingCReamingDHoning第6題Thecharacteristicsofbroachingdonotinclude(

).AHighproductivityBHighmachiningaccuracyCSimpleandlow-costbroachmanufacturingDLowcuttingheat第7題Themainsurfacesofsleevepartsarecoaxialrotatingsurfaceswithlowcoaxialityrequirements.()第8題Forlongsleeves,inadditiontoroundness,thecylindricityoftheholeshouldalsobeconsidered.()第9題Thematerialsforsleevepartscanincludesteel,castiron,bronze,brass,andceramics.()第10題Oneofthemaincharacteristicsofdrillingisthatchipsareeasilydischarged.()第11題Thecommonlyusedtoolfordrillingisthetwistdrill.()第12題Theproductivityofboringishighbecauseroughandfinishmachiningcanbecompletedinonestroke.()第13題Inholegrinding,therigidityofthegrindingwheelspindleisgoodanditisnoteasytobend,deform,orvibrate.()第14題Internalhoningisoftenusedformachiningcylinderboresandlongholes,achievinghighdimensionalandshapeaccuracy.()第15題Internalrollingcanimprovethepositionalaccuracybetweensurfacesoftheworkpiece.()Unit5Practice第1題Commonboxpartsinclude().AShaftBSleeveCGearDGearbox第2題Thecommonlychosenmaterialforboxpartsis().AGraycastironBAluminumalloyCStainlesssteelDBrass第3題Themethodcommonlyusedforroughmachiningtheplaneofboxpartsis().APlaningBGrindingCPolishingDLapping第4題Themethodofplanepolishinguses()forfinishing.ASoftpolishingwheelBToolCGrindingwheelDScraper第5題Themethodsusedtoensureholespacingaccuracyinproductiondonotinclude().AScribingalignmentBMandrelandgaugeblockalignmentCTemplatealignmentDPrecisionmillingalignment第6題Insingle-pieceandsmall-batchproduction,thecoaxialityofthecoaxialholesystemontheboxcanbeensuredbywhichofthefollowingmethods?()AScribingalignmentBCoordinatemethodCMandrelandgaugeblockalignmentDSupportingandguidingusingmachinedholes第7題Whenmachiningbox-typeparts,usingonesurfaceandtwoholesasthepositioningreferencegenerallyconformstothe()principle.APrincipleofcoincidentreferenceBPrincipleofunifiedreferenceCPrincipleofmutualreferenceDPrincipleofself-reference第8題Inthemachiningofthemainspindlebox,usingthespindleblankholeastheroughreferenceaimsto().AEnsureuniformmachiningallowanceofthespindleholesurfaceBEnsureuniformmachiningallowanceofthetopsurfaceoftheboxCReducethetotalmachiningallowanceoftheboxDEnsuretherelativepositionofthespindleandothernon-machinedsurfaces第9題Whichtypeofbasicholeontheboxhasthebestmachinability()?ABlindholeBThroughholeCStepholeDCrosshole第10題Whenmachiningtheboxholesystemusingtheboringtemplatemethod,themachiningaccuracymainlydependson().ASpindlerotationaccuracyofthemachinetoolBStraightnessofthemachinetoolguidewaysCAccuracyoftheboringtemplateDFlatnessofthemachinetoolguideways第11題Crossholesandblindholeshavegoodprocessabilityinboxparts.()第12題Thebossesontheouterwalloftheboxshouldbeassimpleaspossibletofacilitatemachining.()第13題Millingisthemostcommonlyusedmethodinplanemachining.()第14題Planegrindingcanachievehighmachiningaccuracyandlowsurfaceroughnessvalues.()第15題Scrapinghashighproductivityandisthereforeoftenusedinmassproduction.()第16題Grindingissuitableforroughmachiningofparts.()第17題Duringmilling,theloadonthemillingcutterteethisuniform,andthewearisconsistent.()第18題Planescrapingisgenerallycarriedoutafterfineplaningorfinemilling.()第19題High-precisionholesystemscannotbemachinedonordinaryprecisionmachinetoolsusingtheboringtemplatemethod.()第20題Whenmachiningcoaxialholesystems,usingmachinedholesforsupportandguidanceissuitableformassproduction.()第21題Themethodofreverseboringrequirestheworkpiecetobeboredononeendinasingleclampingbeforeadjustment.()第22題Whenmachiningperpendicularholes,usingamandrelanddialgaugeforalignmentcanimprovepositioningaccuracy.()第23題Themaintechnicalrequirementforparallelholesystemsistocontroltheperpendicularityaccuracyoftheholes.()第24題Inthemachiningofparallelholesystems,scribingandalignmenterrorsarelarge,andmachiningaccuracyisgenerallylow.()第25題Thespindleholeontheboxpartisthemainsurface,andthemachiningsequenceshouldgenerallymachinetheholefirst,thenthesurface.()Unit6Practice第1題Thecommonlyusedmethodformachiningthetoothsurfaceofaninternalgearwithgrade8accuracyis().AHobbingBShapingCMillingDGrinding第2題Theadvantageofmachininggearsusingthegeneratingmethodisthatthesamecuttercanbeusedtomachinegearswith().AThesamemoduleandthesamenumberofteethBThesamemoduleanddifferentnumbersofteethCDifferentmodulesandthesamenumberofteethDDifferentmodulesanddifferentnumbersofteeth第3題Thefinishingmethodsuitablefornon-hardenedgearsis().AGearshavingBFormgrindingCGearhoningDBevelgrinding第4題Thetypesofgearsthatcannotbemachinedbyhobbinginclude().AWormgearsBInternalgearsCSpurgearsDHelicalgears第5題Thehobbingmethodcanmachinebothspurandhelicalgearsaswellaswormgears.()第6題Gearshapingisageneratingmethodforgearmachining.()第7題Theaccuracyandproductivityofgearshapingareashighasthoseofhobbing.()第8題Usingthegeneratingmethodtomachinegearsallowsasinglecuttertomachinegearswiththesamemoduleanddifferentnumbersofteeth.()第9題Involutecylindricalgearshave13accuracylevels,withlevel0beingthehighestandlevel12beingthelowest.Levels6to9arecommonlyused.()第10題Whenmachiningthetoothprofileofcylindricalgears,itiscommontouseacombinationoftheinnerholeandoneendfaceforpositioning,satisfyingboththecoincidenceprincipleandtheunificationprincipleofthereference.()第11題Thetoothprofileaccuracyofhobbingishigherthanthatofshaping.()第12題Theindexingaccuracyofhobbingishigh,resultinginhighermotionaccuracycomparedtoshaping.()Unit7Practice第1題Whichofthefollowingisnotamainfactoraffectingthegeometricaccuracyofmachinetools?()1.AMachinetoolrigidity2.BUsingaverniercaliper2.CUsingasteadyrest2.DWorkpiecematerial3.EVisualinspection3.FReducingthedistancebetweenthecuttingforceapplicationpointandthesupport3.GTemperaturechanges4.HUsingalaserinterferometer4.IUsingafollowrest4.JMachiningmethods2.Whichmethodcaneffectivelydetectthegeometricerrorsofmachinetools?(C)1.KUsingordinarymeasuringtools3.Whichofthefollowingmethodscannoteffectivelyimprovetherigidityofaworkpiece?(D)1.LIncreasingthecuttingspeed正確答案：F第2題Whattoolshouldbeusedtoincreasesupportandimproverigiditywhenmachininglongshafts?()1.AThree-jawchuck2.BWorkpiecematerial2.CAmbienttemperatureandsunlight2.DGeometricshapeerrors2.EIncreasingthecuttingdepth2.FCoolingconditions3.GPhysicalproperties3.HUsinganelasticorhydraulictailstockcenter3.IMotorandcuttingtool3.JSelf-centeringchuck3.KCuttingheatandfrictionheat4.LMechanicalprocessingvibrations4.MReducingthecuttingspeed4.NBothoftheabove4.OFollowrest4.PIncreasingtheworkpiecetemperature7.Whatdoesthesurfacequalityofmachiningrefertointhesurfacelayerofthepartaftermachining?(C)1.QMagneticchuck5.Thethermaldeformationoftheprocesssystemmainlycomesfromwhichtwosources?(C)1.RIrrelevantproperties8.Whatisthemainfactoraffectingthesurfaceroughnessingrinding?(C)1.SMachiningfluidandcoolant6.Whenworkpiecethermaldeformationissevere,whichmethodisoftenusedtoreduceitsimpact?(B)1.TToolshape正確答案：O第3題Thewearofmachinetoolguiderailscanleadtogeometricerrorsinthemachinetool.()第4題Thethermalexpansioncoefficientoftheworkpiecematerialhasasignificantimpactonthegeometricerrorsofthemachinetool.()第5題Usingasteadyrestcaneffectivelyimprovetherigidityoflongworkpieces.()第6題Theuniformdistributionofclampingforceisnotimportantwhengrindingthin-walledworkpieces.()第7題Deformationoftheprocesssystemcausedbyheatsourcesaccountsfor40%to70%ofthetotalmachiningerrorinprecisionmachining.()第8題Controllingtheambienttemperaturecancompletelyeliminatetheeffectsofthermaldeformation.()第9題Thesurfacequalityofmachininghasasignificantimpactontheperformance,reliability,andlifespanofproducts.()第10題Thechips,built-upedge,andburrsgeneratedduringcuttinghaveanimpactonsurfaceroughness.()Unit8Practice第1題Thebasicunitofamachineis().AComponentBKitCAssemblyDPart第2題Theclosinglinkoftheassemblydimensionchainis().AThelinkwiththehighestprecisionr