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OINTRODUCTIONDrawbead,themainapproachofblankdeformationinsheetmetalforming,playsanimportantroleinlargemetalpressingforma-tion.Sheetmetalundergoesbendingsandcoun-ter-bendingswhileitpassesthroughdraw-beads.Sincethedeformationischaracteristicofthenonlinearplasticlargedeformation,theconstitutionofdrawbeadresistanceiscomplexandaffectedbymanyfactors.Thismakesthetheoreticalana1ysisofdrawbeadresistancedifficult,andmanyhypothesesandapproximateformulasareadoptedinthetheoreticresolu-tion,especiallyl… 相似文献
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