Transactions of Materials and Heat Treatment

Title：Development case of cold stamping high strength longitudinal beam for automobile

Authors： hu Weifeng Cui Lichun Zhao Liewei Sun Lianfu

Unit： Anhui Jianghuai Group Automobile Co. Ltd.

KeyWords： die surface design surface treatment springback longitudinal beam of automobile cold stamping

ClassificationCode：TG386

year,vol(issue):pagenumber：2018,43(6):24-27

Abstract：

For the design and manufacture of stamping the front section of longitudinal beam for an MPV vehicle, the longitudinal beam process design was optimized by means of computeraided finite element analysis, stamping structure and die design, and datum and tolerance design. Combining the physical and theoretical analysis, the front section of longitudinal beam meeting the vehicle requirement was obtained by optimizing die processing technology, applying surface treatment technology and adjusting influence parameters control. The results show that when the springback compensation amount of profile is 1.25-1.5 times of springback value, a relatively optimized die surface can be obtained, and the distortion of the bottom surface and the concave side wall in drawing can be controlled by the top pressing mechanism and the drawbead. However, special tolerance of 0-1.0 mm designed for the side wall of the front section of longitudinal beam is helpful to assembly. Furthermore, the finishing process and surface treatment after quenching are implemented in advance to reduce the repeated die tryout, and raw material properties fluctuations directly affect the stability of stamping parts.

Funds：

国家科技重大专项资助项目（2014ZX04002041）

楚伟峰（1986-），男，学士，工程师；Email：hitchu@sina.com

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