锻压技术

基于Dynaform和正交试验的轿车加强梁冲压工艺参数优化

英文标题：Optimization on stamping process parameters of car reinforced beam based on Dynaform and orthogonal test

作者：张勇范轶薛洋

分类号：TH164

出版年,卷(期):页码：2019,44(2):37-42

摘要：

起皱、开裂和回弹是汽车覆盖件冲压成形时产生的主要质量问题，直接影响零件表面、尺寸和形状精度。以加强梁为例，利用Dynaform软件对冲压成形过程和回弹进行仿真模拟，采用正交试验和极差分析法，以最小厚度、最大回弹量、开裂和起皱为评价考察指标，研究了压边力、冲压速度、摩擦系数和凸凹模间隙对厚度和回弹的影响规律，优化冲压工艺参数和模具形面。将模拟分析得到的最小厚度值和最大回弹量与实际零件对比，验证了优化方案的合理性与模拟结果的准确性。有效地将零件厚度控制在0.85～1.15 mm之间，回弹控制在1.1 mm以内，减少了修模次数和缩短了生产周期。

Wrinkling, cracking and springback are the main quality problems of stamping for automobile panel, which directly affect the surface, size and shape accuracy of parts. For the reinforced beam, the stamping process and springback were simulated by software Dynaform, and the influences of blank holder force, stamping speed, friction coefficient and clearance between punch and die on the thickness and the springback were studied by the orthogonal test and the range analysis as well as the evaluate indexes of the minimum thickness, the maximum springback, cracking and wrinkling, and the stamping process parameters and mold profile were optimized. By comparing the minimum thickness and the maximum springback of simulation analysis with the actual parts, the rationality of the optimization scheme and the accuracy of the simulation results were verified. The thickness of parts is effectively controlled between 0.85-1.15 mm,and the springback is controlled within 1.1 mm，which reduces the number of die repair and the production cycle.

基金项目：

作者简介：张勇（1984-），男，硕士，讲师 Email：sckjxyzy@163.com

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