Transactions of Materials and Heat Treatment

Title：Optimization of forming process for dash panel beam with ultra high strength steel based on AUTOFORM software

Authors： Niu Chao Chen Xinping Cui Zhenxiang

Unit： Research Institute BaoShan Iron & Steel Co. Ltd. State Key Laboratory of Development and Application Technology of Automotive Steels(BaoSteel)

KeyWords： AUTOFORM stamping ultra high strength steel dash panel beam springback the maximum thinning rate edge compliance

ClassificationCode：TG386

year,vol(issue):pagenumber：2017,42(2):34-37

Abstract：

For the problems of wrinkling, crack, large springback and edge compliance in the forming process of dash panel beam with UHSS (ultra high strength) steel, a whole process simulation was performed by AUTOFORM software, and the problems were analyzed. Then, an optimum process was proposed and evaluated focusing on formability, thinning, springback. The results show that the maximum thinning rate decreases 4% lower than that of the original process, while the edge compliance is much closer to the part edge. The maximum springback is 1.21 mm, nearly half smaller than before, and it is in symmetrical distribution. Meanwhile, the wrinkling at the end flange almost disappears, and it is verified by the actual stamping test. The optimum process ensures sufficient forming and decreases springback. Also, the edge compliance forms well by one-step forming to the end directly. This forming method has a guiding significance for the application of UHSS parts.

Funds：

“十三五”新能源汽车重点专项（2016YFB0101605）

牛超（1989-），男，硕士，工程师

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