外文翻译--基于三维设计的浮动式制动卡钳的车床夹具的研制.doc外文翻译--基于三维设计的浮动式制动卡钳的车床夹具的研制.doc

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英文原文DEVELOPMENTOFTHE3DDESIGNEDLATHEFIXTUREOFAFLOATBRAKECALIPERPANJINKUN1,ZUOWANLI2,LUDONGSHENG21SCHOOLOFMECHANICALENGINEERING,NANJINGINSTITUTEOFTECHNOLOGY,NANJING211167,PRCHINA2COLLEGEOFMECHANICALPOWERENGINEERING,NANJINGUNIVERSITYOFTECHNOLOGY,NANJING210009,PRCHINAABSTRACTACCORDINGTOTHETECHNIQUEREQUESTSOFTHEBRAKECALIPERINTHEPROCESSOFPRODUCTION,ASPECIALFIXTUREOFFLOATBRAKECALIPERHASBEENDEVELOPEDBASEDON3DDESIGNINTHISPAPERTHEDEVELOPMENTPROCESSANDVERIFIEDDATAFROM3DMODELINGANDKINEMATICSSIMULATIONFORTHISSPECIALFIXTURESHOWTHATTHIS3DDESIGNEDPROCESSCANCONVENIENTLYFORECASTTHEASSEMBLYINTERFERENCEOFTHEFIXTUREANDACCURATELYADDTHEMASSOFLEADBRICKBEFORETHEPROTOTYPEISMADEINTHISWAYTHEFLUTTERCAUSEDBYTHEUNBALANCEDLATHEFIXTURECANBEELIMINATEDANDTHEPRECISIONOFRUNOUTTOLERANCEINCYLINDERHOLECOMPAREDWITHMACHINETOOLSPINDLECANBEIMPROVED,THUSTHEPROCESSINGQUALITYOFTHECYLINDERHOLEINABRAKECALIPERCANBEGREATLYGUARANTEEDKEYWORDS3DDESIGN;BRAKECALIPERS;LATHEFIXTURE1INTRODUCTIONINTHEPRODUCTIONOFTHEFLOATDISCBRAKECALIPEROFANAUTOMOBILE,DUETOTHECOMPLEXITYOFITSSTRUCTURE,ASPECIALFIXTUREISNEEDEDFORINSTALLINGANDCLAMPINGTHEBRAKECALIPERACCORDINGTOTHETECHNIQUEREQUESTSOFTHEBRAKECALIPERINTHEPROCESSING,ASPECIALFIXTUREOFFLOATBRAKECALIPERISDEVELOPEDBASEDON3DDESIGNINTHISPAPERANDITS3DMODELISASSEMBLEDVIRTUALLYTHROUGHTHEMECHANISMSIMULATIONFUNCTIONOF3DDESIGNSOFTWARE,THEBALANCEOFALATHEFIXTUREISANALYZED1THERESULTSSHOWTHATTHEDESIGNPROCESSCANEXPEDIENTLYFORECASTSOMEFACTORSWHICHAFFECTTHEQUALITYOFTECHNICALEQUIPMENTSUCHASASSEMBLYINTERFERENCE2ANDTHEMACHININGSTABILITYOFTHELATHEFIXTUREBEFORETHEPROTOTYPEISMADETHISDESIGNPROCESSCANNOTONLYAVOIDTHEDESIGNERRORSINTHETRADITIONALDESIGN,BUTALSOIMPROVETHEDESIGNQUALITYOFPRODUCTS23DDESIGNOFTHESPECIALLATHEFIXTURETHEMANUFACTUREOBJECTOFTHESPECIALFIXTUREISTHEBRAKECALIPEROFAFLOATDISCBRAKE,SHOWNASFIGURE1;ITSMACHININGSURFACEISTHECYLINDERHOLEOFTHEBRAKETHEFIGURESHOWSWHENTHECYLINDERHOLEISBEINGPROCESSED,ITSAXISANDTHEMACHINESPINDLEROTATIONAXISMUSTBEINCOINCIDENCEDUETOIRREGULARSHAPESTRUCTUREOFTHEBRAKECALIPER,THEFLUTTERWHICHISCAUSEDBYTHEUNBALANCEMASSPOSEDBYTHEFIXTUREANDTHEWORKPIECEWOULDAFFECTTHEMACHININGACCURACYANDROUNDNESSOFTHECYLINDERHOLESIZEINTHEACTUALPROCESSING,ANDSOMEPRECISIONREQUIREMENTOFGEOMETRICTOLERANCESUCHASPARALLELISMBETWEENTHETWOCYLINDERHOLESTOAVOIDTHEPROBLEMSINTHEDESIGNPROCESSOFTHELATHEFIXTUREOFTHEBRAKECALIPER,ASPECIALFIXTUREISDEVELOPEDBASEDON3DDESIGNINTHISPAPERACCORDINGTOTHESHAPESTRUCTURALCHARACTERISTICSOFTHEBRAKECALIPERANDTHECLAMPINGREQUIREMENTSOFTHELATHEFIXTURE,THECYLINDERHOLESHOULDBECOMPLETEDAFTERACLAMPINGOFTHELATHEFIXTUREINTHEWHOLEPROCESSINGTHEFLANGENEEDSTHEMOUNTINGHOLEOFMACHINETOOLSPINDLEANDLOCATIONHOLEOFTHEFIXTUREONBOTHSIDESOFTHECENTERASAMIDDLEWARECONNECTINGTHEMACHINETOOLSPINDLEANDTHEFIXTUREITISENSUREDTHATTHEAXISOFTHEPROCESSINGCYLINDERHOLEOFTHECALIPERBODYWHICHISLOCATEDANDCLAMPEDONTHEFIXTUREANDTHEMACHINESPINDLEAXISOFROTATIONNEEDCOINCIDENCE3,ASSHOWNINFIGURE2THEMODELINGPROCESSOFOTHERPARTSOFTHESPECIALFIXTUREISNOTDEPICTEDINDETAILINTHISPAPER,PLEASEREFERTOREFERENCE4THENTHESEPARTSAREASSEMBLEDINTOTWOCOMPONENTS,UPANDDOWN,ASSHOWNINFIGURE3ANDFIGURE4THEWHOLEFIXTUREISDIVIDEDINTOTWOCOMPONENTSWHENITISBEINGASSEMBLEDTHISCANAVOIDTHEPARTSBEINGMISSEDORINSTALLEDWRONGLYINTHEASSEMBLYPROCESSINTHECOMPONENTDOWN,ASTHEBENCHMARKOFFLANGE,THECOUNTERBALANCEISFIXEDWITHBOLTSTHECOUNTERBALANCEWOULDBEREGULATEDINBALANCEWHENTHEFIXTUREISPRODUCEDINTHECOMPONENTUP,ASTHEBENCHMARKOFTHEFIXTURE,THELOCATINGPLATEISFIXEDWITHSEVENBOLTSTHENASTHEBENCHMARKOFTHELOCATINGPLATE,THEUPPERHALFPARTOFTWOTHREADEDSTUDSAREROTATEDINTOTHELOCATINGPLATE,ANDTHEPRESSUREPLATEISCLAMPEDONTHETHREADEDSTUDSBYBOLTSINTHEFIXTURE,THEPRESSUREPLATEISINDIRECTCONTACTWITHTHEWORKPIECE,SOITISUNDERGREATSTRESSTHEREFORE,THEMATERIALOF45MN2ISSELECTED,WHICHNEEDSTREATMENTOFQUENCHINGANDTEMPERINGMATCHINGBLOCKNEEDNOTTOBEFIXEDINTOTHEFIXTUREDURINGTHEINITIALASSEMBLYANDTHEMASSOFMATCHINGBLOCKISDETERMINEDBYTHERESULTOFMOTIONSIMULATIONFIGURE1BRAKECALIPERSFIGURE2FLANGEFIGURE3COMPONENTDOWNFIGURE4COMPONENTUPAFTERTHEASSEMBLIESOFCOMPONENTUPANDCOMPONENTDOWNARECOMPLETED,THEYARECOMBINEDINANEWCOMPONENTUNIT,WITHTHEBOLTSANDNUTS,ASSHOWNINFIGURE5SHOWSDUETOADOPTINGHIERARCHICALASSEMBLY5,ITISRATIONALINTHEPRACTICALPRODUCTIONPROCESSANDTHEPARTSMANAGEMENTISEASY,WHICHCANEFFECTIVELYSHORTENTHEDESIGNCYCLEFIGURE5COMPONENTUNIT13BALANCEANALYSISOFTHEKINEMATICSOFTHESPECIALLATHEFIXTURETHEMASSOFEACHPARTNEEDSTOBEDETERMINEDBEFORETHEPROCESSOFKINEMATICSSIMULATIONOFTHESPECIALLATHEFIXTUREASISSHOWNINFIGURE6,THEMATERIALANDDENSITYOFEACHPARTISDEFINEDBYMENUCOMMANDMECHANISM/QUALITYATTRIBUTES,ASTABLE1SHOWS,THEVOLUMEANDMASSOFPARTARECALCULATEDOUTBY3DDESIGNSOFTWAREWESELECTCARBONSTEELASTHEMATERIALOFOTHERSTANDARDPARTSSUCHASTHEBOLTSANDNUTS,ITSDENSITYIS785G/CM3INTHEPROCESSOFDEFININGTHEMASSONPRO/E,UNITCONVERSIONALSONEEDSATTENTIONFIGURE6DISSECTIONFIGUREOFTHEFIXTURETABLE1MATERIALANDDENSITYOFTHEMAINPARTSOFFIXTURENUMBERPARTNAMEMATERIALDENSITYG/CM31COUNTERBALANCEA37852FLANGEHT200723FIXTUREHT200724MATCHINGBLOCKLEAD11375LOCATING457856PRESSUREPLATE45MN2785ESTABLISHINGCOMPONENTUNITE,ANDTHEN,COMPONENTUNIT1WOULDBEASSEMBLEDONTHEMAINSHAFTASTHEBENCHMARKOFMACHINESPINDLEAXISBYTHEWAYOF“CONNECTIONPINCONNECTION”,ASISSHOWNINFIGURE7AFTERENTERINGAMECHANICMODEL,THEGRAVITYISSETINADEFAULTVALUEINTHECOLUMNOF“DIRECTION”,WESETX1,OTHER0ADDEDINAMOTOR,ITSROTATIONRATEIS360R/MINTHENA“RUN”ISESTABLISHEDWITHITSSETTINGS,“DYNAMICTYPE”AND“OPENINGGRAVITY”INTHECOLUMNOF“EXTERNALLOAD”TILLTHEN,THEKINEMATICSSIMULATIONPROCESSCANRUNINORDERTOREDUCEFLUTTEROFTHECYLINDERHOLE,THEBALANCEOFASPECIALFIXTUREISTAKENASTHEKEYANALYSISINTHISPAPER6,7THEOBJECTIVEOFBALANCEANALYSISISTOMAKETHEHOLISTICCENTROIDOFTHEFIXTUREANDTHEWORKPIECEINTHEMACHINESPINDLEAXISOFROTATIONTHUS,WESHOULDDETERMINETHEHOLISTICCENTROIDOFTHEFIXTUREANDTHEWORKPIECEFIRSTTHENTHEDISTANCEBETWEENHOLISTICANDSPINDLEAXISCANBEOBTAINEDTHEDISTANCEBETWEENTHEHOLISTICANDSPINDLEAXISSHOULDINCLINETOZEROASFARASPOSSIBLEBYADJUSTMENTOFTHEMASSOFTHEMATCHINGBLOCKTHEDETAILEDLOCATIONSOFCENTROIDSINTHREEDIRECTIONSOFX,Y,ZCANBEOBTAINEDTHROUGHTHEMEASURINGFUNCTIONOFPRO/EBECAUSEOFSETTINGTHEMACHINESPINDLEAXISOFROTATIONASTHEZAXIS,THEDISTANCEOFTHECENTROIDRELATIVETOTHECENTREROTATIONCANBEDETERMINEDONLYINNEEDOFTHEMAXIMUMOFTHECENTROIDATTHEDIRECTIONOFXORYTHEMEASUREMENTRESULTSOFFIXTURESIMULATEDMOTIONWITHOUTAMATCHINGBLOCKISSHOWNINFIGURE8WHENTHEFIXTURETURNEDABOUT90,THEMAXIMUMDEVIATIONDISTANCEOFTHECENTROIDIS–2208MMINTHEDIRECTIONOFXONLYBYDOINGTHATCANWEKNOWTHATTHECENTROIDISNOTONTHEAXIS;ASARESULTITDOESNOTMEETTHEBALANCEREQUIREMENTFIGURE7COMPONENTUNITEFIGURE8POSITIONCURVEOFCENTROIDWITHOUTMATCHINGBLOCKINORDERTOMEETTHEBALANCEREQUIREMENTAMATCHINGBLOCKNEEDTOBEADDEDTOADJUSTTHECENTROID,ASSHOWNINFIGURE4AFTERADDINGTHEMATCHINGBLOCK,RETURNTOANALYZEANDTHENREMEASURETHERESULTISTHATTHECENTROIDISSTILLNOTONTHEAXIS,BUTTHEDISTANCEOFTHECENTROIDRELATIVETOTHEAXISISSHORTENEDINTHECASEOFINCREASINGTHETHICKNESSOFTHEMATCHINGBLOCK,THEMODIFICATIONANDMEASUREMENTISEXECUTEDAGAINANDAGAININTHESIMULATIONPROCESSTHROUGHANUMBEROFTESTS,ANIDEALDISTANCEOFTHECENTROIDRELATIVETOTHEAXISISOBTAINEDTHEVALUEIS15107MM,ASFIGURE9SHOWS,SOITCANBECONSIDEREDTHATTHECENTROIDISONTHEAXIS,ANDTHERESULTSATISFIESTHEBALANCEREQUIREMENTSACCORDINGTOTHESIMULATIONRESULTWITHAMATCHINGBLOCK,ALEADBRICKWHOSETHICKNESSIS30
编号:201311171559317058    类型:共享资源    大小:2.64MB    格式:DOC    上传时间:2013-11-17
  
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