锻压技术

基于响应面法和修正Archard磨损理论的汽车前下摆臂热锻模具应力与磨损分析

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

作者：殷剑1 黎诚2 金康1 2 董奇3

单位：1. 北京机电研究所有限公司 2. 中机精密成形产业技术研究院（安徽）股份有限公司 3.合肥学院先进制造工程学院

关键词：汽车前下摆臂模具磨损模具应力响应面法热锻模具

分类号：TG376.2

出版年,卷(期):页码：2022,47(6):231-238

摘要：

以汽车前下摆臂热锻模具作为研究对象，基于Archard修正磨损模型，采用模具预热温度、模具下压速度、模具初始硬度和摩擦因数4因素正交试验，建立了可信度较高的回归模型，进行了模具磨损和应力的预测与优化。通过响应面法求解出的最佳参数组合为：模具下压速度为78.80 mm·s-1、模具预热温度为206.72 ℃、摩擦因数为0.34和模具初始硬度为52.76 HRC，此时模具的磨损深度为3.75×10-6 mm、模具应力为672 MPa。将实际值与预测值拟合后发现，预测值与实际值具有较好的一致性，回归模型的真实性较高。通过试验验证得到模具单次磨损深度为3.875×10-6 mm，与响应面模拟结果的误差小于5%，验证了响应面模型的准确性。

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.

基金项目：

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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