锻压技术

六角螺母冷镦挤压成形工艺分析及参数优化

英文标题：Process analysis and parameter optimization on cold heading-extrusion Process analysis and parameter optimization on cold heading-extrusion

作者：张伟

单位：安阳职业技术学院

关键词：冷镦挤压成形六角螺母损伤值正交试验 Deform-3D

分类号：TG316.1

出版年,卷(期):页码：2018,43(8):103-109

摘要：

以某六角螺母冷镦成形为例，采用有限元分析软件Deform-3D对六角螺母两种多工位成形方案中工位5分别进行模拟分析。通过对比分析成形效果、成形载荷、工件损伤值，得出采用正挤压加深螺母内孔的工艺方案能够得到更优的成形效果。随后以降低工件损伤值为目标，选取冲压速度、模具表面硬度、下冲头分流角、摩擦系数作为因素，设计正交试验，并通过多次仿真计算得到最优参数组合为：冲压速度5 mm·s-1，模具表面硬度50 HRC，下冲头分流角3°，摩擦系数0.1。采用最优参数组合进行对应试模，工件成形质量良好，符合生产要求，所得结论为实际生产提供了理论依据。

For the cold heading process of a hex nut, the step 5 in two different multi-position forming schemes were simulated by finite element software Deform-3D respectively, and the better extrusion effect produced by the forward extrusion to deepen the inner hole of hex nut was obtained by comparing and analyzing the extrusion effect, extrusion loading and damage value of workpiece. Then, reducing damage value of workpiece was regarded as the object, and the stamping speed, surface hardness of die, split angle of lower punch and friction coefficient were chosen as factors, and the orthogonal experiment was designed to optimize these parameters. Furthermore, the simulation calculation was conducted repeatedly, and the optimal parameters were obtained with the stamping speed of 5 mm·s-1, die surface hardness of 50 HRC, split angle of lower punch of 3° and friction coefficient of 0.1. Finally, the test with above parameters was conducted, and the good extrusion quality was gained to meet all production requirements, which provides a theoretical basis for actual production.

基金项目：

企业横向项目（JS-2018173）

张伟（1972-），男，学士，讲师 E-mail：zj_1308@163.com

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