Transactions of Materials and Heat Treatment

Title：Stamping analysis and experimental study on automobile rear axle housing

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ClassificationCode：TH164

year,vol(issue):pagenumber：2020,45(7):71-88

Abstract：

For the defects existing in the actually stamping of rear axle housing in automobile, the stamping process of rear axle housing was numerically simulated by software DYNAFORM, and the influences of blank holder force and stamping speed on stamping were analyzed. Then, taking the maximum thinning rate as the evaluation index, selecting stamping speed, blank holder force, friction coefficient and clearance between punch and die as the factors, the orthogonal experiment was designed to optimize the process parameters. The results show that the primary and the secondary relationship of influences for the various factors on the maximum thinning rate is stamping speed, friction coefficient, blank holder force and clearance between punch and die successively. The optimal forming process parameters are the stamping speed of 1000 mm·s-1, the blank holder force of 300 kN, the friction coefficient of 0.12 and the clearance between punch and die of 6.2 mm. Under the optimal process parameters, the maximum thinning rate of part is 14.35%, the maximum thickening rate is 8.38%, and the forming quality of simulation results is good. Finally, the actual stamping experiment was carried out. Compared with the finite element simulation results and the actual part, the error of the maximum thinning rate is 7.65%, and the error of the maximum thickening rate is 0.6%. Furthermore, the surface quality of parts is good without crack and wrinkle, and the simulation results are basically consistent with the experimental results.

Funds：

江西省重点研发计划（20192BBEL50013, 20181BBE50011）

胡义华（1972-），男，硕士，高级工程师 E-mail：hyh@jlchassis.com 通讯作者：黄志超（1971-），男，博士，教授 E-mail：hzcosu@163.com

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