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1、J.ShanghaiJiaotongUniv.(Sci.),2010,15(3):313-318DOI:10.1007/s12204-010-1009-zAReconfigurableStampingDieandItsStampingProcess***SONGAi-ping∗(宋爱平),WUWei-wei(吴伟伟),ZHANGJun(张军)(CollegeofMechanicalEngineering,YangzhouUniversity,Yangzhou225009,Jiangsu,China)?ShanghaiJiaoton
2、gUniversityandSpringer-VerlagBerlinHeidelberg2010*Abstract:Areconfigurableflexiblepolesdiewasdeveloped.Thediecanbeusedtoimplementtheprocessof“themulti-pointpressingandformingsheet”.Sheetmetalisrestrictedbytheelasticpressingforcesputtingontheupperandlowersurfacesofsheet
3、instampingprocess.Themethodisaneffectivewaytoenhancethebucklingcriticalstressesandreducewrinklingofsheet.Theresultsoftestsindicatethatthediecanachieve“onediebringsmulti-purpose”andsuppressthewrinkleofsheet.Theprocessofthemulti-pointpressingandformingsheetprovidesaprac
4、ticalandeffectivewayforthecurvedsheetmetalforming.Keywords:stampingprocess,wrinkle,reconfigurable,die**CLCnumber:TG386Documentcode:A1IntroductionWrinklingofsheetmetalseriouslyinfluencestheformingqualityandthelifeofdie.Itmaymaketheformingprocessunabletocarryon.Soeffective
5、lysup-pressingwrinkleseemstobehighlyimportant[1].Inrecentyears,inordertomeetthedemandoflightandtoughsheetmetal,thinsheetmetalpartsarewidelyap-pliedinvariousfields.ThestudyofWrinklingbecomesoneofthehottestresearchtopics[2].Sincethenearcentury,manyscholarshavebroughtmas
6、sivestudiesanddiscussionsintotheinstabilityofsheet.Theseresearchescoveredfromtheexperimentalstudyandthetheoreticalanalysistothenumericalsim-ulation,fromthesheetdrawingandthebendformingtothehydroforming,fromthewrinkleforecasttothebucklingcontrolandsoon[1-3].Recently,n
7、umericalsimulationofaformingprocessisappliedtostudyonwrinkle.Dependingonthemod-ernadvancedresearchmethods,numericalsimulationbasedonthefiniteelementmethodhasbecomethemaintoolofstudywrinklingindecades[4].However,majoritystudiesencirclewrinklingbifurca-tionofsheetmetala
8、ndthesituationsofwrinklingatthepresenttime.Butthesecannotbringanyfeasiblemethodforcontrollingthewrinklesinstamping.Currently,therep
