锻压技术

汽车悬架球头拉杆冷成形技术

英文标题：Cold forming technology of ball head tie rod for automobile suspension

作者：莫德赟

单位：桂林航天工业学院

分类号：TG376

出版年,卷(期):页码：2020,45(2):55-60

摘要：

为提高生产效率、改变原来通过车削加工汽车悬架球头拉杆的方式，提出了一种球头拉杆的多工位冷镦成形工艺。基于DEFORM-3D软件建立了有限元模型，对球头拉杆的塑性成形过程进行了仿真，研究了预成形凸模入模角α、预成形凹模圆角R1、终成形凹模圆角R2以及终成形凹模入模角β等工艺参数对球头拉杆成形的影响，并进行了正交试验，以模具在球头拉杆成形过程中所受载荷及工件损伤值为优化目标，获得了合理的工艺参数组合。结果表明：在保证工件成形质量及模具寿命的前提下，当预成形凸模入模角α为30°、预成形凹模圆角R1为12 mm、终成形凹模圆角R2为3 mm、终成形凹模入模角β为60°时，模具载荷及工件损伤有显著的降低。采用优化后的参数进行试模生产，工件成形质量较好，验证了模拟结果的可信性，能够有效地指导工艺设计人员的设计工作。

In order to improve the production efficiency and change the original process of ball head tie rod for automobile suspension by turning, a multi-station cold upsetting process was proposed. Based on software DEFORM-3D, a finite element model was established to simulate the plastic forming process of ball head tie rod, and the influences of the technological parameters such as pre-forming punch entry angle α, pre-forming die fillet R1, final forming die fillet R2 and final forming die entry angle β on the forming process of ball head tie rod were studied. Then, the orthogonal tests were carried out, and the reasonable combination of process parameters was obtained by taking the load of mold and the damage value of part in the forming process of ball head tie rod as the optimization goals. The results show that on the premise of ensuring the forming quality of workpiece and the life of mold, it has a significant effect on reducing the die load and the workpiece damage with the pre-forming punch entry angle α of 30°, the pre-forming die fillet R1 of 12 mm, the final forming die fillet R2 of 3 mm and the final forming die entry angle β of 60°. Furthermore, using the optimized parameters for trial production, the forming quality of workpiece is better, which verifies the credibility of the simulation results and effectively guides the design work of process designers.

基金项目：

广西高校中青年教师基础能力提升项目 (2017KY0869)

莫德赟（1983-），男，硕士，讲师，E-mail：dicky094@qq.com

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