锻压技术

基于DEFORM的一体式盖型螺母冷成形工艺研究及仿真试验

英文标题：Research and simulation test on cold forming process for integral cover nut based on DEFORM

作者：梁天宇

单位：大连职业技术学院

分类号：TH162

出版年,卷(期):页码：2019,44(11):110-115

摘要：

为提高盖形螺母的生产效率，满足批量化的生产需求，研究了一体式盖形螺母冷成形新工艺，以替换原有的组合式焊接盖形螺母成形工艺。以塑性成形理论为基础，采用有限元软件DEFROM-3D，对盖形螺母的成形过程进行了仿真，基于Archard磨损理论，对3种上冲头结构进行了优选，以延长上冲头的使用寿命。然后结合正交试验，设计了上冲头初始硬度、上冲头圆角、上冲头速度、上冲头前角以及摩擦系数的5因素4水平试验表，研究了各试验因素对上冲头磨损的影响;以上冲头磨损量最小为优化目标，获得了盖形螺母成形的最佳参数，并根据最优参数预测了上冲头的使用寿命。最后，进行了实际生产试模，获得的盖形螺母质量良好，对工艺人员的设计工作具有一定的指导作用。

In order to improve the production efficiency of cover nut and meet the batch production demand, a new cold forming process of integral cover nut was studied to replace the original forming process of combined welding cover nut. On the basis of plastic forming theory, the forming process of cover nut was simulated by finite element software DEFROM-3D. Based on Archard wear theory, three kinds of upper punch structures were optimized to prolong the service life of upper punch. Then, combined with orthogonal test, a four-level test table with five factors such as initial hardness, fillet, velocity and front angle of upper punch as well as friction coefficient was designed, and the influences of various test factors on the wear of upper punch were studied. With the minimum wear of upper punch as the objective of optimization, the optimum parameters for the forming of cover nut were obtained, and the service life of upper punch was predicted according to the optimum parameters. Finally, the actual production test was carried out. And the quality of cover nut obtained is good, which has a certain guiding role for the design work of technicians.

基金项目：

梁天宇（1978-），女，硕士，讲师，E-mail：136132213@qq.com

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