本文用M—K凹槽模型和倾斜凹槽模型,计算了不同材料性能参数的成形极限图,计算了不同应变路径对成形极限图的影响,并用双板实验的结果与理论计算结果进行了对比。实验与理论计算结果都表明,曲线应变路径对成形极限图有明显影响。因此,用实验方法绘制成形极限图时,必须保证应变路径的直线性。 In this paper, M-K groove model and inclined groove model were used to calculate the forming limit of different material performance parameters. The influence of different strain paths on the forming limit figure was calculated. The results of double-plate experiment and theoretical calculation were compared . Experiments and theoretical calculations show that the curve of the strain path has a significant impact on the forming limit map. Therefore, when drawing the forming limit map experimentally, the straightness of the strain path must be ensured.