车身结构件在实际生产过程中,常需要多道冲压成形工序才能加工出来,工序数量及各工序内容(即塑性变形程度)都会决定成形过程能否顺利完成并影响产品最终成形质量。首先分析了左后悬挂架成形特点,决定采用两步拉延方式完成成形;然后确定首次拉延的四种方案,来研究不同变形形式和变形量对后继拉延所造成的成形质量的影响;通过数值模拟结果中的 FLD 曲线、材料厚度分布图、最大主应变分布图和拉延成形变形裕度,来研究车身结构件多步冲压工艺设计。 Body structure parts in the actual production process, often require more than one stamping process can be processed out, the number of processes and process content (ie, the degree of plastic deformation) will determine the formation process can be successfully completed and affect the final product quality. Firstly, the forming characteristics of the left rear hanger are analyzed, and the two-step drawing method is adopted to finish the forming. Then four schemes of the first drawing are determined to study the influence of different deformation forms and deformations on the forming quality caused by the subsequent drawing. The multi-step stamping process design of the vehicle body structure was studied through the FLD curve, the material thickness distribution, the maximum principal strain distribution and the drawing deformation allowance in the numerical simulation results.