汽车加强板冲压模芯磨损分析及工艺参数优化  

Wear analysis and process parameter optimization on stamping die core for automobile reinforcing plate

作　　者：董竹林 李永锋 Dong Zhuin;Li Yongfeng(College of Automotive Engineering,Shanxi Vocational University of Engineering and Technology,Jinzhong 030619,China;College of Biomedical Engineering,Taiyuan University of Technology,Taiyuan 030002,China)

机构地区：[1]山西工程科技职业大学汽车工程学院,山西晋中030619 [2]太原理工大学生物医学工程学院,山西太原030002

出　　处：《锻压技术》2024年第6期102-109,共8页Forging & Stamping Technology

基　　金：山西省交通运输厅科技计划项目(2012-1-24)。

摘　　要：针对BR1500HS高强钢加强板热冲压过程中凹模模芯磨损量大的问题,利用Deform有限元软件进行了加强板的热冲压磨损分析。通过建立高强钢的材料模型并应用Archard修正模型来准确预测模芯的磨损行为,选取对模芯磨损影响较大的板料加热温度、模芯预热温度、冲压速度以及模具间隙4个因素作为优化变量,以模芯最大磨损深度为优化目标,结合响应面理论建立了各变量关于优化目标的二阶响应面回归分析模型,得到了模芯最大磨损深度随各变量的变化规律。模型寻优后确定的最佳工艺参数为:板料加热温度为680℃、模芯预热温度为380℃、冲压速度为45mm·s1、模具间隙为2.25mm。采用优化后的参数进行实际冲压试验,模芯寿命提高了32.2%,解决了模芯磨损严重的问题。同时,实际模芯寿命与响应面模型预测值和有限元模拟预测值相近,验证了建模及优化结果的准确性。For the large wear amount of die core in the hot stamping process of BR1500HS high-strength steel reinforcing plate,the hot stamping wear of reinforcing plate was analyze by finite element software Deform,and the wear behavior of die core was accurately predic-ted by establishing the material model of high-strength steel and applying the Archard modified model.Then,taking the heating tempera-ture of sheet metal,pre-heating temperature of die core,stamping speed and die clearance as the optimization variables,which had a sig-nificant impact on the wear of die core,and taking the maximum wear depth of die core as the optimization objective,a second-order re-sponse surface regression analysis model for each variable regarding the optimization objective was established by using response surface theory,the variation rule of the maximum wear depth of die core with each variable was obtained.After optimizing the model,the optimal process parameters were determined as the heating temperature of sheet metal of 680 C,the pre-heating temperature of die core of 380℃,the stamping speed of 45 mm·s'and the die clearance of 2.25 mm.Furthermore,the actual stamping tests were conducted by the optimized parameters,and the life of die core was increased by 32.2%,solving the problem of severe wear of die core.At the same time,the actual life of die core was similar to the predicted values of response surface model and finite element simulation,verifying the accuracy of the modeling and optimization results.

关 键 词：高强钢 热冲压 模芯磨损 Archard修正模型 响应面模型 

分 类 号：TG386.41[金属学及工艺—金属压力加工]