復(fù)合精沖過程的計算機(jī)模擬及模具結(jié)構(gòu)優(yōu)化

1、華中科技大學(xué)碩士學(xué)位論文復(fù)合精沖過程的計算機(jī)模擬及模具結(jié)構(gòu)優(yōu)化姓名：戴凱申請學(xué)位級別：碩士專業(yè)：材料加工工程指導(dǎo)教師：張祥林肖祥芷20080530II華中科技大學(xué)碩士學(xué)位論文華中科技大學(xué)碩士學(xué)位論文AbstractFineblankingisanadvancedprecisionprocessingtechnology.Thefinishedparthassmoothedgehighquality.Becauseofhigheffici

2、entlowconsumptionfinequalitysomeotheracteristicsfineblankinghasbeenwidelyusedinindustrialproduction.Compositefineblankingwhichisanewareaoffineblankingtechnologycanmakeacomplex3Dpartinonlyonestoke.Butwhenblankingthethicks

3、tuffthelifeofthediemaybeveryshtthequalityofthepartmaynotmeettherequirementincludingthequalityofpunchingsectionthesizetheshapeofpart.Allofthesehaveaffectedthepromotionapplicationofthisprocessingtechnology.Indertofindtheca

4、usesoftheseproblemsitisneededtodothefiniteelementanalysisofcompositefineblankingprocess.Targetsofthisstudyareakindoffineblankingpartstheprocessingdie.Actuallythispartisaratchetwheelwhichisusedincars.Thestructureofthepart

5、isverycomplicatedwhichhasacteristicsofsemipunchingchamfering3Dtooth.Inthisthesisfirstthe3Dmodelsofthediepartwerecreated.ThenthesemodelswereimptedtotheDefm3DV5.0softwarethedynamicsimulationofcompositefineblankingprocesswa

6、sdonewiththem.Afterthesimulationmanyresultscanbegot，suchastheprocessinganimationofthefmingpartthestressstrainofanywhereoninsidetheparttheloadcurveofthemainpunchsoon.Theseresultscannotonlyhelpustoconfirmthefceofthemainpun

7、chwhichwkedasboththeblankingmaledieextrusionfemaledie，butalsoevaluatethequalityofpartimproveprocessingtechnology.Inthefollowingthesafetyanalysislifepredictionofthemainpunchwasdonewhichisoneofthemostcriticalpartsofthedie.

8、ThetoolusedinthesimulationistheFatigueAnalysisModuleofAnsysWkbench10.0.Afterthat，firstaproperresultwasgotwhichincludedthestressdefmationofthemainpunch.thenthelifeofthemainpunchpredictedfromthesimulationisveryclosetotheac