Transactions of Materials and Heat Treatment

Title：Optimization on precision forging process for aluminum alloy pump housing in motor vehicle exhaust gas aftertreatment system based on response surface method

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ClassificationCode：TG319

year,vol(issue):pagenumber：2020,45(1):1-8

Abstract：

For the problems of insufficient filling for forging boss, easy cracking of die and excessive flash material in the precision forging process for aluminum alloy pump housing in motor vehicle exhaust gas aftertreatment system, the quadratic polynomial response surface model was built by taking the filling rate of end face for forging boss, the rate of final forging force and the material utilization rate as the optimization goals and the die preheating temperature, the billet length, the billet heating temperature and the flash bridge height as the design variables. Then, the forging paramenters were optimized by combining the response surface method with differential evolution algorithm, the optimized parameters of forging process were obtained with the die preheating temperature of 350 ℃, the billet length of 83.27 mm, the billet heating temperature of 490 ℃ and the flash bridge height of 1.15 mm. At last, the actual production with the optimized forging parameters was conducted, the forging was fully filled to improve the die life and material utilization.

Funds：

国家自然科学基金资助项目(51775249)；江苏省企业研究生工作站项目（2017168）

杜重凯（1993-），男，硕士研究生 E-mail： 980145286@qq.com 通讯作者：王雷刚(1963-)，男，博士，教授，博士生导师 E-mail：lgwang@mail.ujs.edu.cn

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