基于DYNAFORM的对拼焊板拉深坯料优化

Research on Optimized Stamping Forming Process of Tailor Welded Blanks Based on Dynaform

针对当前激光拼焊件拉深过程高成本、低效率以及工艺复杂等问题,文章建立了一个激光拼焊板拉深坯料焊缝布置模型。首先通过单向拉伸实验获取高强度钢板DP780及超高强度钢板DP1180的力学性能参数,并将这些参数代入CAE模拟软件中,以提高模拟的准确性。经筛选确定2个极值代表方案,通过对比得出优化焊缝方位布置模型,并从理论上说明了此模型优于其他模型的原因,其后对最优模型进行物理实验。实验证实该模型在完成拼焊板拉深工艺时,不仅可以降低生产成本、提高生产效率,同时还能降低工艺复杂程度。该模型可为复杂拼焊件冲压成形的生产实践提供理论指导。

For the issues of high cost,low efficiency and process complexity in the stamping forming process for tailor welded blanks,a model was built which involved the layout for welding line. The uniaxial tensile experiment carried out to get the mechanical property parameters of DP780 and DP1180,and these parameters were used in CAE to improve the accurateness. After filtrating,two typical cases were put into effect. The optimized welding line arrangement model was come out by comparision. It explained the reason of the model superior other models based on the theory,and the optimal model for physical experiment was proceeded. Experiments confirms that the model in the deep drawing technology of tailor-welded sheet can reduce production costs, improve production efficiency and reduce process complexity effectively. The model can provide the theoretical direction to the practice of the complex tailor weld stamping.