汽车减震器端盖多次拉深数值模拟及工艺稳健优化设计

《汽车减震器端盖多次拉深数值模拟及工艺稳健优化设计》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、江苏大学硕士学位论文ABSTRACTMulti—stepsdeepdrawingisoftenusedwhentheformlessofmanypartshappenswithasingleprocessinstampingpartsproduction．Multi—stepsdeepdrawinghassomedifferencesfromone-stepforming，thedeformationmechanismiscomplicatedandthedeformationruleisdifficulttodescribe．Sotheintensivestudyofnumericals

2、imulationcalculationonmulti—stepsdeepdrawingisveryvaluableinpredictingvariousdefects，seekingforanoptimizationmethodforsheetmetalforming，reducing．productdevelopmentcyclesandguidingmulti—stagepractice．Inthisdissertation，thebasicfiniteelementtheorybasedonnon—linerfinitedeformationwasexpounded．Theform

3、ingcharacteristicsofshockabsorberlidwereanalyzedandthenumericalsimulationmethodwasadoptedtoestimatethedefectsattwo—stepsstampingbasedonthemodelwithmiddleprocesshole．ByusingthefiniteelementcodeDYNAFORM，theformingprocessbasedonthemodelwithcentralprocessholewassimulated．Thesimulationresultshowsthatby

4、punchingthecentralprocesshole，theplasticflowuniformitycanbeincreasedandtheratioofthinningreduced．Inaddition，crackcanbemoreeffectivelycontrolledandtheformingqualitycanbeimproved．Theresearchworkofprocessparameterswhichisregardasthepreparationbeforerobustoptimizationdesignwasalsocarriedout．Theparamet

5、errobustoptimizationofthestampingdrawingprocessofshockabsorberlidisamultifactorproblem．Therobustoptimizationdesignwasadoptedforthischaracteristic．Animprovedresponsesurfacemodelbasedonrobustdesignwasadopted，whichcombinestheadvantagesoftheorthogonalexperimentaldesignandtheregressionanalysis．Twokeyfa

6、ctors(diameterofcentralprocesshole，frictioncoefficient)hadbeen汽车减震器端盖多次拉深数值模拟及工艺稳健优化设计selectedfrommanyprocessparametersinordertocontroltheformingquality．Andtheotherswereratedasthenoisefactors．BymeansofMATLAB，therobustoptimalsolutionofthekeyfactorswasobtained：diameterofcentralprocesshole12．6mmandfr

7、ictioncoefficientO．11．Undertheinfluenceofthenoisefactors，numericalsimulationbasedontherobustoptimalsolutionwasperformed．TherangeofthemaximumthinningratioinsheetmetalformingislessthanO．2％．Thereforetherobustoptimal