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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,foreachspecificfixturepositioningsupportbaseandsomeofthegeneraluseof10to20mmthicksteelplateweldedstructureA3.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.Inordertofacilitatetheinstallationandmeasurementfixture,installtheplatformmusthavethecoordinatesofreference,therearegenerallythreetypesofstructurebelow:3.1.1Thequasi-holemethodTombInstallationofplatformdesignisthefourreferenceholes,eachholeinthecenterofthetwoconnectionlinesformacoordinatedirection,thefourholesconstitutethecoordinatesoftwoperpendicularlines.This,XYplanecoordinatesystemontheset.Theestablishmentofthisbenchmarkisrelativelysimple,easytoprocess,butthemeasurementsusedinconjunctionwiththebaseblock.Baseblockisarectangularblocksizeoftheamountofaccuratemeasurement,theplatformisinstalledintothebaseholeinthebasemarketing,referenceblockoffasideclosetothetwobenchmarkstoformacoordinatedirection.3.1.2V-typetobelawThisapproachisintheprocesstoinstalltheplatformintoeachoftwo90-degreeV-groove,whichV-grooveofaplanesurfaceperpendiculartotheinstallationofplatform,suchplaneperpendiculartotheplatform,thetwoV-groovegroovethesurfaceoftheformXYplanecoordinatesystem.3.13referenceblockmethodReferenceblockusingthesideperpendiculartothetwoconstitutivethree-dimensionalXYZcoordinatesystem,usuallyafixturebasewith3to4blockscanbedirectlyinstalledontheplatformcanalsoaddabearingfixedtothefixtureplatform,butrequiresreferenceblockThelastplanetocontroltheheightmustbeconsistentwiththedirection.Manufacturingbasetoadjusttheblockinfrontofthetwomethodsisrelativelydifficult,butthemeasurementisconvenient,especiallytheuseofCMMmeasurements.Blockmethodwithabenchmarkofinstallationplatformplaneprocessingrequirementsarerelativelylow,alargersizeoftheinstallationplatformshouldusethismethod.3.2ThechoiceofbearingsurfaceBearingsurfaceshouldbeusedwhenweldingpiecesarefixedonthesurfaceofthecutplanetoplaneandinstalltheplatformangleisnotgreaterthan15degreesonthesurface.Asfaraspossiblethedetectionsurfaceandweldingpiecesofthesame,flatsurfaceasfaraspossibleinordertofacilitateprocessingandadjustment.Structureshouldbedesignedbearingsurfacecanbeeasilyprocessed,withthenumberofmodulesforthep