锻压技术

圆钢管无凹模冲孔的凸模结构优化设计

英文标题：Optimization design of punch structure for round steel pipe without die in piercing

作者：朱超覃才友

单位：四川工程职业技术学院

分类号：TG385.2

出版年,卷(期):页码：2015,40(3):74-77

摘要：

针对钢管无凹模冲孔工艺中的平凸模、尖凸模等传统凸模结构无法解决的凹坑、塌陷量大等缺陷，提出一种新型螺旋型凸模结构。通过有限元模拟分析，研究了螺旋型凸模中上刃角β与下刃角α对冲裁力和冲裁质量的影响规律。采用正交试验设计研究螺旋型凸模中上刃角β和下刃角α的匹配关系，优化后的凸模结构参数为上刃角β为45°和下刃角α为40°。采用优化后的凸模结构参数进行模具设计，在可倾开式压力机上进行冲压试验，钢管冲孔的凹坑小、毛刺小，冲孔成形质量满足要求，试验结果与模拟结果一致。

For the deformation defects of scallops and large scale of collapses produced in the traditional flat and sharp punch during non-die piercing process, a new spiral punch structure was presented. The influences of upper blade angle β and lower blade angle α of spiral punch on punching force and punching quality were studied by finite element simulation analysis. Moreover, the relationship between upper blade angle β and lower blade angle α of spiral punch was researched based on orthogonal experimental design. Finally，the optimal parameters of punch structure were obtained，namely the upper blade angle is 45° and the lower blade angle is 40°. The die structure was designed by the optimized punch structure parameters, and the stamping tests were carried out by tilting open press. With only a little concave and burr, the piercing quality met production requirements. The test result is consistent with the simulation result.

基金项目：

朱超（1969-），男，硕士，副教授

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