Transactions of Materials and Heat Treatment

Title：Influencing of process parameters on forming performance of B-pillar inner based on HSTWB

Authors： Yan Huajun1 2 Zhang Shuangjie1 2 Ma Shibo1 2 Huang Tao1

Unit： 1.Hebei University of Science and Technology 2.Hebei Engineering Technology Research Center of Precision Punching Process and Die

KeyWords： high strength tailor welded blank (HSTWB) B-pillar inner weld bead blank holder force die clearance

ClassificationCode：

year,vol(issue):pagenumber：2016,41(1):38-43

Abstract：

High strength tailor welded blank (HSTWB) has the advantage of reducing the weight of the car, saving energy, protecting the environment and improving the safety performance of the vehicle. When TWB with different thicknesses was stamped, partial parts were prone to rupture, wrinkle and springback. The forming process of B-pillar panels based on high-strength TWB B340LA was simulated by the finite element analysis software Dynaform, and the influences of the blank holder force and the die clearance on the forming of B-pillar TWB were researched. The results were validated by experiments. The results show that the thinning rate of the part and weld bead movement increase with the increase of blank holder force, while the thickening rate and the springback amount of parts decrease. However, the thinning rate and thickening rate reduce with the increase of die clearance, the movement of weld bead and the amount of springback increase. The reasonable process parameters show as follows: the blank holder force is 1200 kN, which is 1.03 times of the theoretical value, and the die clearance is 1.1 times of the plate thickness.

Funds：

石家庄市科技局科研资助项目(12108151A); 河北科技大学校立科研基金资助项目(TY16)；河北科技大学博士启动基金项目（QD201224）

闫华军(1978-)，男，博士，讲师

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