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汽车覆盖件模具基于快速成型技术和快速模具技术的制造.pdf

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JournalofMaterialsProcessingTechnology120+2002)237±242 Manufactureofthedieofanautomobiledeckpartbased onrapidprototypingandrapidtoolingtechnology YuhuaSong*,YongnianYan,RenjiZhang,DaXu,FengWang CenterofLaserRapidForming,DepartmentofMechanicalEngineering,TsinghuaUniversity,Beijing100084,PRChina Received3June2001 Abstract Toproducethemetaldieofanautomobiledeckpartofhighqualityatlowcostwithashortcycle,anewmethodofmanufacturingthe die,basedonrapidprototypingandrapidtooling,isproposedinthispaper.First,thetechnologicalprocessofrapidprocessing+RP) technologyandthelarge-scalerapidprocessingandmanufacture+RP&M)equipmentSSM-1600thatisbasedontheinnovativeideaof concurrentprocessinginadivided®eldareintroduced.TheSSM-1600equipmentsuppliesagapinthe®eldofmakinglargeprototypes. ThetechnologyoftheunbakedceramicmoldcastingprocessbasedonRPtechnologyisalsointroduced.Themethodof3Dnon-linear coupledthermo-mechanicalFEManalysisisadoptedtoanalyzethedimensionalaccuracyofthedieofanautomobiledeckpartduringthe castingsolidi®cationprocess.ThesimulationresultcanbeusedtomodifytheCADmodeltofurtherimprovetheprecisionofthedie.The systemofmanufacturingthedieofanautomobiledeckpartbasedonrapidprototypinghasgainedsuccessbytheveri®cationofpractical production.#2002ElsevierScienceB.V.Allrightsreserved. Keywords:Rapidprototyping;Rapidtooling;Dieofautomobiledeck;3Dnon-linearFEManalysis;Precisioncasting 1.IntroductionprototypeisacquiredbyRP.Secondly,theceramicmold isconvertedfromtheprototypethroughunbakedceramic Withtherapiddevelopmentoftheautomobileindustry,technology.Thirdly,thecastingisobtainedbyprecise themanufactureofthedieofalarge-scaleautomobiledeckcastingand®nally,thediewithhigh-dimensionalaccuracy atlowcost,withashortmanufacturingcycle,isthekeyandgoodsurfacequalityis®nishedthroughpolishing. factorforthecompetitiveautomobileindustry.Theshort-CeramicmoldcastingbasedonRPtechnologylieswithin comingsofthetraditionalmoldmanufacturingare:acom-theareaofRT[6].InRT,themoldisacquiredbypolishing plexproce