热冲压成形工件冷却效果仿真研究.pdfVIP

Mar．2015 HydromechatronicsEngineering Vo1．43 No．6 HydromechatronicsEngineering http：／／jdy．qks．cqut．edu．cn E—mail：jdygcyw@126．corn NumericolstudyofcoolingCharaCteriStiCS forblankinginhotstamping Chen—guangLAI ，ChaoMAN ，Kai—pingWEN ， Zhi—gangYAN ，Meng．huaDUAN (CollegeofVehicleEngincering，ChongqingUniversityofTechnology，Chongqing400054，China) (h~stituteofFluidScience，TohokuUniversity，Sendai980—8577，J印Ⅱn) Abstract：Coolingdownthehigh temperatureofblankingrapidlyisakeyproblem in hotstampingprocedure． Twodifferentcoolingtunnelsweresetinhotstampingmold，onewassmoothinnerwall，andanotheraddedtrian— glebackupbarsinit．Coolingperformanceforblankinginthetwocasesaswellastheflow andheattransfersitua- tionofcoolingwaterintwodifferenttunnelswereobtainedafterthenumericalsimulation．Theresuh showsthat， thecoolingeffectofinnerbackupbarstunnelisadvantageousthansmoothtunnel，andalsotheheattransferabili— tyisstronger．Forbackupbarstunnel，theaveragetemperatureofworkpieceis12klowerthanthatofsmoothtun— nelwhileholdingtimeis10s．Fordesigningofcoolingtunnelsinhotstamping，thisresearchalsoprovidedimpor- tantreferences． Keywords：Hotstamping，Numericalsimulation，Coolingtunnel，Enhancedheattransfer doi：10．3969／j．issn．1001—3881．2015．06．006 Documentcode：A CLC number：TK124 thediametersofthetunnelsareeffectivewaysto a— 1Introduction chievethegoal，itcouldnothaveobviouschangesbe· causeofthesizeslimitofthemold．Morestudiesare Theapplicationofhighstrengthsteel(HSS)isan ofCUSontheenhancedheattransferoftunnels．Toa— effectiveapproach to achieve automotivelightweight— chieveit，YangKun[3]createdanequivalentther- ing．To getHSS，hotstamping i