在金属薄板的冲压成形中,由于断裂、皱折以及表面变形等形状缺陷,弹性变形回复等尺寸精度差,表面形状不良等,而限制其成形临界值。在实际成形过程中,因为存在这些缺陷,所以确立正确的综合成形性评定系统是极其重要的。在薄板冲压成形过程中,通过控制断裂、皱折、形状冻结等形成 In the press forming of sheet metal, the forming threshold is limited due to the dimensional defects such as breakage, buckling and surface deformation, dimensional accuracy such as elastic deformation recovery, and poor surface shape. In the actual forming process, because of these shortcomings, it is of crucial importance to establish the correct formability assessment system. In the sheet metal stamping process, by controlling the rupture, wrinkles, the formation of frozen shape