基于逆向有限元法的激光拼焊板拉深坯料优化

Optimizing for Laser Tailor Welded Blank Base on Reverse Finite Element

针对激光拼焊板冲压过程中成形性能及轻量化要求,对其进行相关优化研究。以DP780与DP1180激光拼焊板方盒件拉深成形工艺为基点,通过单向拉伸实验获取2种材料的力学性能参数,代入CAE软件DYNAFORM中以提高模拟准确性,并基于逆向有限元法对方盒件坯料的形状与尺寸进行优化,最终得出优化的激光拼焊板拉伸坯料轮廓设计方案。物理实验证明:使用通过逆向有限元法优化而得的坯料外轮廓进行拉深成形,不仅可以提高成形性能,同时还降低了材料损耗。

Aiming at the forming properties and lightweight requirements for tailored blanks in stamping,this paper put forward an optimization program. The research was developed with the square box which is drawn by DP780 and DP1180 tailor welded blanks. The mechanical properties of two materials was tested though uniaxial tensile experiment to improve the accurateness on CAE. Based on the reverse finite element method,the shape and size of the square boxes blank was optimized,then the optimal laser tailor welded blank model was established in the end. The physical experiment shows that using the reverse finite element method is an effective technique to improve the forming properties and save the materials at the the same time.