采用网格分析法,对车身覆盖件冲压制造过程中产生的成形缺陷进行分析.通过对缺陷区域的定量网格分析,计算得出该区域的材料变形行为.同时结合材料性能,将测量区域应变分布与材料成形极限曲线和相应的安全成形曲线相比较,分析与探讨了冲压缺陷产生原因及改进措施.结果表明:网格分析方法可直接反映测量区域变形行为,是进行大型覆盖件冲压成形分析和改进成形缺陷的有效方法. Using grid analysis method to analyze the forming defects in the process of stamping and manufacturing of automobile body coverings, the deformation behavior of the material in this area was calculated by quantitative grid analysis of the defect area.At the same time, combined with the material properties, The results show that the mesh analysis method can directly reflect the deformation behavior in the measurement area and is the result of the stamping forming analysis of large-scale coverings And to improve the forming defects of the effective method.