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Abstract：
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TWBs have been widely applied to automobile industry as an advanced technique with the advantages of cutting down manufacturing cost,reducing weight of the car and improving safety,etc.But for stamping process,there are some problems such as,wrinkling,cracking etc.,which can be improved and solved by loading blankholder force(BHF) properly.Through the method of finite element simulation based on Dynaform software,the means of constant BHF and fixed blankholder gap in TWBs stamping,and their influence on force distribution applied on the die,weld-bead movement and forming quality were studied.Based on the prerequisite of no cracking,the fit constant BHF was acquired from reasonable blankholder gap control.The results indicate that compared to the method of constant BHF,the method of fixing blankholder gap is propitious to forming,reducing weld-bead movement and changing the loading on the mold.The method of fixed blankholder gap can be used to obtain the effective value of BHF and improve the efficiency during confirming the BHF required in TWB forming.
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Reference：
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