激光拼焊板制轿车门内板冲压成形的数值模拟

利用Dynaform软件对激光拼焊制轿车门内板进行了冲压成形数值模拟,分析了冲压成形过程中出现的拉裂、起皱、变形不充分和焊缝移动量过大等严重影响产品质量的成形缺陷产生的原因,采用正交实验法对拉深工艺参数和模面结构参数进行设计,提出选择最佳压边力、设置拉深筋高度合理、改善润滑条件等优化方案,可以改善成形质量;采用二次拉深成形工艺,能有效改善起皱、拉裂、焊缝移动和成形不充分等缺陷。实际的工艺设计和生产证明,成形过程与数值模拟实验结果吻合良好。

Numerical simulation of drawing process for laser tailor-welded blank of car door inner plate

The stamping forming of laser tailor-welded blank for car door inner panel was simulated based on the Dynaform,stamping process and the deflects that influence the product quality seriously in stamping process,such as the wrinkling,cracking,insufficient deformation and large quantities movement of weld line,were simulated and analyzed.After the comprehensive analysis of wrinkling and cracking,the drawing technological parameters and modular structure parameters were designed using orthogonal experiment.The prioritization schemes were proposed,such as optimum blank holder force,the height of drawing tendon,lubrication condition and so on,which could improve forming quality.The drawbacks of wrinkling,cracking,insufficient deformation and large quantities movement can be greatly improved,when adopting twice drawing forming technology.Practical process design and manufacture show that forming process and the result of numerical simulation experiment fit well.