利用有限元分析软件Dynaform对锥形凸模圆孔翻边过程进行模拟实验,通过改变坯料厚度和圆锥斜度,得到不同的翻边极限系数。分析结果表明,在合适的锥角范围内,圆锥形凸模比圆柱形凸模更能提高材料的极限变形程度。同时,得出了板料厚度和圆锥斜度对翻边极限的影响规律:即当坯料厚度不变时,随着圆锥斜度的变化,其翻边极限系数呈现先减小后增大的趋势;当圆锥斜度不变时,随着板料厚度的增加,翻边极限系数则逐渐减小。 The finite element analysis software Dynaform was used to simulate the flanging process of conical punch hole, and different limit values ​​of flanging were obtained by changing the blank thickness and taper. The analysis results show that the conical punch can improve the ultimate deformation of the material more than the cylindrical punch within the proper cone angle. At the same time, the influence law of flange thickness and taper on flanging limit is obtained: when the thickness of billet is constant, the flanging limit coefficient of flange decreases at first and then increases with the change of taper When the cone taper is constant, as the thickness of the sheet increases, the limit factor of burring gradually decreases.