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1、职业技能鉴定国家题库—车工中级工技能鉴定试题（Occupationskillappraisalnationalexam-Turnerintermediateskillsidentificationtest）Occupationskillappraisalnationalexam-TurnerintermediateskillsidentificationtestI.judgmentquestions:(1pointspergame,25points)1、wormandwormgearareusuallyusedtotransmittwoshaftsandsta
2、gger60degrees.2,whentheturningmodulusislessthan5MM,thelayeredcuttingmethodcanbeused.3,intheroughcarworm,inordertopreventthethreecuttingedgesimultaneouslyparticipateincuttingandcause"knife"phenomenon,generallycanuseleftandrightcuttingmethodturning.4,eccentricparts,thedistancebetweent
3、hetwobusesiscalled"eccentricity"".5,atthebeginningofturningeccentricshafteccentricoutercircle,theamountofcuttingshouldnotbetoolarge.6,withafullrangeof10MMindicator,notinthetwotopmeasuringeccentricity.7,whenturningtheslendershaft,inordertoreducetheradialforceofthetoolontheworkpiece,t
4、hemaindeflectionangleofthetoolshouldbeincreasedasmuchaspossible.8、withfourjawsinglemovingchuckclamping,cannotturnthepositionaccuracyanddimensionalaccuracyrequirementsoftheworkpiece.9,therotationaccuracy,stiffnessandvibrationresistanceofthespindleaffectthemachiningaccuracyandsurfacer
5、oughnessoftheworkpiece.10whentheopeningandclosingnutsareseparated,theslidingplateboxandthekniferestcannotmove.11theexchangegearsusedinturningthethreadandturningthewormarenotthesame.12,thelathefrontandbacktopunequalheight,willmaketheprocessingholeassumestheellipse.Memberrepliesbelowt
6、osee==============================13,theprocessofheattreatmentoftheworkpiecetoachievethedesiredchemicalpropertiesiscalledtheprocessofheattreatment.14,inthemechanicalprocessing,inordertoensurethereliabilityofprocessing,processmargintoomuch,leavinglessthangood.15,intheprocessingofslen
7、dershaftworkpiece,iftheprocessisonlyhalf,theworkpieceinthelathe,canbeinthemiddlepartwithwoodenblocksupport.16、thecenterholeisthebenchmarkofprocessingdrivescrew,andshouldberepairedandprocessedaftereveryheattreatment.17,inordertoensurethewormandmatingwormgearmeshingcorrectly,oftenuset
8、hesamesizeofwormgea
