锻压技术

某汽车减震器支架冲压质量分析与控制

英文标题：Analysis and control of stamping quality for an automobile shock absorber bracket

作者：魏熹鸣1 王匀1 滕士意1 杨进2

分类号：TG386.1

出版年,卷(期):页码：2024,49(11):16-22

摘要：

汽车减震器支架的凹凸面和空间曲线众多，尺寸和形位精度要求高，采用QStE460TM热轧酸洗钢进行冲压成形时易出现开裂、回弹量大等问题。基于响应面法建立以冲压件的最大减薄率和最大回弹量为优化目标，以压边力、冲压速度、模具单边间隙和摩擦因数为设计变量的响应面模型，结合二阶响应面法与Design Expert，采用Box-Behnken实验设计方法，通过增设预翻边工序对支架冲压件的工艺参数进行优化，确定最佳参数为：压边力为383.7 kN，冲压速度为385.9 mm·s-1，模具单边间隙为3.36 mm，摩擦因数为0.16。试产结果表明，改进后的工艺规程可以有效控制支架冲压成形质量，为复杂曲面零件成形工艺优化提供了依据。

The automotive shock absorber bracket with the characteristics of numerous concave and convex surfaces, spatial curves, as well as high dimensional and positional accuracy was prone to cracking and large springback amount during stamping for QStE460TM hot-rolled pickling steel. Then, based on the response surface method, taking the maximum thinning rate and maximum springback amount of stamping part as the optimization objectives, and the blank hold force, stamping speed, die one-sided clearance and friction factor as the design variables, the response surface model was determined. Furthermore, combining the second-order response surface method and Design Expert, the experiment design method of Box-Behnken was used to optimize the process parameters of stamping part for bracket by adding the pre-flanging process, and the optimal parameters that the blank hold force of 383.7 kN, the stamping speed of 385.9 mm·s-1, the die one-sided clearance of 3.36 mm and the friction factor of 0.16 were determined. The results of the trial production show that the improved process can effectively control the stamping quality of bracket and provide the basis for optimizing the forming process of complex curved parts.

基金项目：

泰州市科技成果转化项目（SCG202220）；泰州市科技支撑计划（TG202247）；扬州市重点研发项目（SCY2022010022）；无锡市科技攻关项目（G20222007）

作者简介：魏熹鸣（1997-），男，硕士研究生 E-mail：1262081429@qq.com 通信作者：王匀（1975-），男，博士，教授 E-mail：wangyun@ujs.edu.cn

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