Transactions of Materials and Heat Treatment

Title：Analysis and optimization on wrinkling defect in bending process for a car chassis frame bending pipe

Authors： Hu Xiao Yin Jingjing Wang Chuangwei Wang Feilong

Unit： State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization PanGang Group Research Institute Co. Ltd.

KeyWords： chassis frame pickling sheet bending pipe wrinkling SIGMA analysis

ClassificationCode：TG386.43

year,vol(issue):pagenumber：2022,47(9):112-117

Abstract：

Aiming at the wrinkling problem in the bending process of a car chassis frame bending pipe，based on SIGMA module of Autoform software, the influence of material parameters on wrinkling defect was analyzed, and the parameters of material which were sensitive to wrinkling defect were determined, so as to guide the material improvement. The influence of yield strength, tensile strength, r90 and friction factor on the wrinkling defect for S355MC steel pickling sheet material was analyzed. The simulation results show that the yield strength and tensile strength have a great influence on the wrinkling defect of bending pipe, while the friction factor and r90 have almost no influence on the wrinkling defect. It is beneficial to reduce the yield strength and the yield strength ratio to control the wrinkling defect. By adding an appropriate amount of Cr and adjusting the coiling temperature, the yield strength and the yield strength ratio of S355MC steel pickling sheet material are effectively reduced. The average yield strength is 374.1 MPa, and the average yield strength ratio is below 0.73. By reducing the yield strength and the yield strength ratio of the material, the wrinkling problem of bending pipe is successfully solved.

Funds：

胡晓（1990-），男，硕士，工程师 E-mail：hgdxiaohu@163.com

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