Transactions of Materials and Heat Treatment

Title：Optimization of wavy contour of the stamping blank for engine cover based on reverse reckoning

Authors： Zhang Xinyi1 Wang Chengyong1 Wang Siyan1 Cheng Yongzhang2 Guo Fangfang1

Unit： 1.Hefei University of Technology 2. Hefei Jinhaikang

KeyWords： stamping process blank design finite element method grid strain measurement

ClassificationCode：

year,vol(issue):pagenumber：2015,40(10):49-54

Abstract：

For issues of forming defects and low material utilization ratio of the automotive engine cover plate, the deep drawing process of the automotive engine cover plate was simulated by software Dynaform, and the blank boundary flow was analyzed. Then, the wavy contour line of the stamping blank of engine cover was deduced by the reversed algorithm so as to improve material utilizing rate by 64.2%. Furtherly, the surface design of the die was optimized and the influences of the outline of the die cross section and the initial position of sheet on the distance of ridge line were analyzed. The surface defect of ridge sliding was solved efficiently. The experiment of deep drawing was carried out with the wavy blank and the improved die. The results show that the part is obtained without crack and residual ripple. The sliding distance of four ridge lines are controlled in less than 5 mm, so the surface curvature is continuous and the quality of surface is high. Afterwards, the safety margin of the wavy blank after forming is verified by the strain grid measuring technology. The risk of forming crack is suppressed.
Key words: stamping process; blank design; finite element method; grid strain measurement

Funds：

国家自然科学基金资助项目（51275146）

张心怡（1990-），男，硕士研究生

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