Transactions of Materials and Heat Treatment

Title：Stress and wear analysis on hot forging mold for automobile front lower swing arm based on response surface method and modified Archard wear theory

Authors： Yin Jian1 Li Cheng2 Jin Kang1 2 Dong Qi3

Unit： 1.Beijing Electromechanical Research Institute Co. Ltd. 2.China Machinery Industry Technology Research Institute of Precision Forming 3.School of Advanced Manufacturing Engineering Hefei University

KeyWords： automobile front lower swing arm mold wear mold stress response surface method hot forging mold

ClassificationCode：TG376.2

year,vol(issue):pagenumber：2022,47(6):231-238

Abstract：

For the hot forging mold of front lower swing arm for automobile, based on Archard modified wear model, a model with high confidence regression was developed by the four-factor orthogonal test of preheating temperature, loading speed and initial hardness of mold as well as friction factor, and the prediction and optimization of mold wear and stress were conducted. Then, the optimal parameters combination obtained by response surface method was the loading speed of mold of 78.80 mm·s-1, the preheating temperature of mold of 206.72 ℃, the friction factor of 0.34 and the initial hardness of mold of 52.76 HRC, then the wear depth of mold is 3.75×10-6 mm and the mold stress is 672 MPa. After fitting the actual values and the predicted values, it is found that the predicted values and the actual values are in good consistency, and the authenticity of regression model is high.It is verified that the single wear depth of mold is 3.875×10-6 mm, and the error with the response surface simulation result is less than 5%, which verifies the accuracy of the response surface model.

Funds：

福建省科技计划项目（2020H4019）

殷剑（1997-），男，硕士研究生 E-mail：a18726451924@163.com 通信作者：金康（1978-），男，硕士，高级工程师 E-mail：jinkang@cmipf.com

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