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精品文档TheDesignoftheWeldingJunetionClampofMotorcar[Abstract]Thetextintroducesthedesignmethodandconstructionoftheweldingjunctionclampofmotorcar.KeyWords:WeldingassemblyBaseClampLoeation1.IntroductionAssemblyandweldingfixtureintheautomotivebodyassemblyandweldingproductionlineofcriticalprocessequipmentrelatedtomanufacturingqualityofthecar.Inweldingproduction.Assemblyandweldingfixturesinadditiontothecompletionofthisprocessthepartsassembly,positioning,thealsoservedasatestandcalibrationproceduresontheRoad,weldingpartsweldingqualityofthetask,soitsdesignandmanufactureoftheweldingprocessaffectsthelevelofautomobileproductioncapacityandproductquality.Automotivestylevary,weldingfixtureshapeandthusvarywidely,butinthedesign,manufacture,adjustmentshaveincommon,youcanlearnfromeachother.2.thestructuraldesignofweldingfixtureFixturestructuraldesign,toensurethatthefolderhasagoodconvenienceofoperation,clampingpositioningreliability.Fixturemanufacturersalsoadjustedtoensureeasyintegrationofvariouspartsofthestructuresurfaceshouldallowsufficientroomforadjustmenttoensurethethree-dimensionaladjustable.Ensuringtheaccuracyoftheweldingqualityandweldingunderthepremiseofthestructureoffixtureshouldbeassimpleaspossible.Fixturedesignisusuallythegeneraluseofweldedstructures,thebasiccomponentisdividedintothreeparts,namelybase,supportthepositioningpart,clampingparts,foreachspecificfixturepositioningsupportbaseand。1欢迎下载精品文档someofthegeneraluseof10to20mmthicksteelplateweldedstructureA3.Clampingpartofthenormal10mmwithathicknessofabout45combinationofweldedsteelplate.Pneumaticandmanualclampingpartofthetwo,accordingtothesizeofcarproductionclampingmethodtodeterminethegeneralhigh-volumepneumaticclamping,thenmanuallyclampingcanbeusedasauxiliaryclamping;smallquantitiesinordertoreducethecostofmanuallyclampmode.Manualclampingisusuallymanuallyfastclip,manualquickclipoftheirproductshasbecomethestandard,typeandquantityneededcanbepurchasedinthemarket.Forsomefixturesrequireapneumaticclamping,butdirectuseofpneumaticclamping.Maydamagetheworkpiece,then,canbemanuallypressedfirstplace,togiveapneumaticclampingforcetoclamptheworkpiece,whichismanual-PneumaticJthefixtureclampingsystemisinstalledonalargeplatform,allguaranteedfixtureintheweldingpositionofweldingconditionsshouldbeconsistentwiththedesignoftheworkpiececoordinatedimensions,whichinvolvesthepositioningfixturebenchmarks.3assemblyandweldingfixturesbenchmarksandtheirchoiceofsupportsurface3.1tflip-chipbenchmarktestfixtureEachfixturemustbeafixturecoordinatesystem,inthiscoordinatesystem,thecoordinatesofitsbaseofsupportsizeshouldbesupportingtheworkpieceandthecoordinatescorrespondingtothesamesize.Fixturecoordinatesystemisestablishedbasedonfixturesideofthechildbase.Becausethewholefixturesystemtoguaranteeaspaceautoweldingpiecesofthree-dimensionalcoordinatesystem,sothissysteminallofthefixturemusthaveacommonbenchmark,thisbenchmarkisthefixturetoinstallplatformthatistheX,YZuoBiao,eachspecificfixtureinplatformlocation,thecorrespondingheightshallcoordinateZ,sothatthree-dimensionalXYZcoordinatesystemisestablished.Inordertofacilitatetheinstallation。2欢迎下载精品文档andmeasurementfixture,installtheplatformmusthavethecoordinatesofreference,therearegenerallythreetypesofstructurebelow:Installationofplatformdesignisthefourreferenceholes,eachholeinthecenterofthetwoconnectionlines formacoordinate direction, thefourholesconstitute thecoordinatesoftwoperpendicular lines. This, XYplane coordinate systemonthe set. Theestablishmentofthisbenchmarkisrelativelysimple,easytoprocess,butthemeasurementsusedinconjunctionwiththebaseblock.Baseblockisarectangularblocksizeoftheamountofaccuratemeasurement,theplatformisinstalledintothebaseholeinthebasemarketing,referenceblockoffasideclosetothetwobenchmarkstoformacoordinatedirection.Thisapproachisintheprocesstoinstalltheplatformintoeachoftwo90-degreeV-groove,whichV-grooveofaplanesurfaceperpendiculartotheinstallation ofplatform, suchplaneperpendicular totheplatform, thetwoV-groovegroovethesurfaceoftheformXYplanecoordinatesystem.3.13referenceblockmethodReferenceblockusingthesideperpendiculartothetwoconstitutivethree-dimensionalXYZcoordinate system,usually afixture basewith3to4blockscanbedirectlyinstalled ontheplatform canalsoaddabearingfixedtothefixture platform,butrequiresreferenceblockThelastplanetocontroltheheightmustbeconsistentwiththedirection.Manufacturingbasetoadjusttheblockinfrontofthetwomethodsisrelativelydifficult,butthemeasurementisconvenient,especiallytheuseofCMMmeasurements.Blockmethodwitha。3欢迎下载精品文档benchmarkof installation platform plane processing requirements arerelativelylow,alargersizeoftheinstallationplatformshouldusethismethod.3.2ThechoiceofbearingsurfaceBearingsurfaceshouldbeusedwhenweldingpiecesarefixedonthesurfaceofthecutplanetoplaneandinstalltheplatformangleisnotgreaterthan15degreesonthesurface.Asfaraspossiblethedetectionsurfaceandweldingpiecesofthesame,flatsurfaceasfaraspossibleinordertofacilitateprocessingandadjustment.Structureshouldbedesignedbearingsurfacecanbeeasilyprocessed,withthenumberofmodulesfortheproductcanbeusedtoprocessbearingNCsurface,inthedesign,thecarcoordinateXipointwasnotnecessarilysuitedfixturebearingsurfacewithNC,whichrequiressupportingthefixtureblockaccesspointSasthebase,theestablishmentofadigitalsurface,thissurfaceshouldbeconsistentandbetheBearingsurface,sothatwhenitwasmanufacturedtoSbasepointforNCmachining,precisionmachiningandassemblydebuggingeasy.4.positioningtheworkpieceThegenerallocationoftheworkpiecestoholesorobvioussurfacefeaturesasthepositioningreferencesurface.Thepositioningpinsarecommonlyusedcomponents.Fixturepositioningsub-activities,andfixedpositioningoftwo,forsomejobs,inordertofacilitatetheworkpieceintoandout,positioningtheformofoptionalactivities,eventsorblockpinpositioningstructureoftheformsub-pneumaticandmanual,inprinciple,puttheworkpieceseeded,positioningpiecestoopenintotheworkpiece,thepositioningpiecesout,andthenclamp;workpieceremoved,thepositiontoreturnitemsbeforeandafterclamprelease.Activitiescanbeusedlocatepiecesofthemovement。4欢迎下载精品文档structureofpan-typeorflip-style,pan-typestructureisusuallygivenpriority.5weldingpiecesofthestationtransferbetweenMostautoweldingpartstobeweldedinseveralstation,soitneedstransmissiondevice,usuallytoavoidinterferenceweldingfixture,theworkpieceinthetransmissionbeforethefirstpiecerises,whichrequiresuseelevator,liftingbodiesGearrack,four-link,etc.,rackandpiniondrivestructureprocessingandlinkstructurearenotasgood.