锻压技术

双联齿轮的冷挤压工艺

英文标题：Cold extrusion technology of duplicate gear

作者：骆静谭安平尹小燕殷俊文

分类号：TG316

出版年,卷(期):页码：2019,44(9):73-79

摘要：

为解决双联齿轮直齿与斜齿部分同时存在带来的成形难题，针对其特殊的结构特点，对该零件进行了分析并制定了4个成形方案。利用Deform-3D软件对工件的金属流动规律、变形特点、成形缺陷等问题进行了有限元模拟。通过方案的讨论与模拟结果的对比分析，最终确定方案2更佳，并在此基础上对凸模形状和入模角度进行了优化，形成了最终方案。该方案既能满足难度较大的成形要求又大幅降低了成形载荷，且齿形充填饱满，基本无成形缺陷，产生的塌角也能在后续机加工中很好地解决。同时，还讨论了双联齿轮斜齿部分的两种脱模方式。综合来看，最终确定采用直接挤压的方式脱模。

In order to solve the forming problem caused by the simultaneous existence of spur teeth and helical teeth for duplicate gear, according to its special structural characteristics, the part was analyzed, and four forming schemes were formulated. Then, the metal flow law, deformation characteristics and forming defects of part were simulated by software Deform-3D, and the scheme 2 was finally determined to be better through scheme discussion and contrastive analysis of simulation results. Based on this, the shape of punch and the die-entrance angle were optimized, and the final scheme was formed. The scheme not only meets the requirements of difficult forming but also greatly reduces the forming load, the gear teeth are filled fully without forming defects basically, and the resulting collapse angle is well solved in the subsequent machining. At the same time, two kinds of demoulding methods for helical teeth of duplicate gear were discussed. Overall, the demoulding method was determined finally by direct extrusion.

基金项目：

四川省教育厅科研项目（17ZB0061）；成都理工大学工程技术学院基金项目（C122018011）

骆静（1983-），男，硕士，讲师 E-mail：beyondlj996@126.com

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