锻压技术

汽车后桥主动齿轮坯的楔横轧成形工艺

英文标题：Cross wedge rolling process for automobile rear axle drive gear billet

分类号：TG331

出版年,卷(期):页码：2022,47(10):198-202

摘要：

汽车后桥主动齿轮是汽车动力传动系统中的关键零件，针对其传统制造工艺“锤上拔长-模锻成形”存在的生产效率低、材料利用率低的问题，提出采用“楔横轧-模锻成形”工艺来生产汽车后桥主动齿轮，并对主动齿轮零件进行结构优化，取消杆部台阶，最终轧制出杆部倾斜角度约为2°的轧制坯件，实现了主动齿轮零件的楔横轧制坯模具的通用化。针对楔横轧工序中轧件不旋转的问题，提出了在楔横轧模具侧楔面加工半圆形截面或三角形截面的槽，结果发现三角形截面的槽更能满足旋转条件。另外，还研究了不同工艺参数对心部损伤值的影响规律，研究结果有利于提高主动齿轮的生产效率。

The automobile rear axle drive gear is the key part of automobile power transmission system. Therefore, for the problems of low production efficiency and low material utilization rate in its traditional manufacturing process “hammer drawing-die forging”, “wedge cross rolling-die forging” process was proposed to produce the rear axle drive gear of automobile, and the structure of drive gear part was optimized. Then, the step of rod part was cancelled, and the rolling billet with a rod inclination angle of about 2° was rolled, so as to realize the universalization of blank making die of cross wedge rolling for the drive gear. Furthermore, in order to solve the problem that the rolling part did not rotate in the process of cross wedge rolling, the groove with semicircular cross section or triangular cross section produced on the side wedge surface of the cross wedge rolling die was proposed, and it was found that the groove with triangular cross-section was more suitable for the rotation condition. Finally, the influence laws of different process parameters on the damage value of the core were studied. The results are helpful to improve the production efficiency of the drive gear

基金项目：

四川省科技计划项目（2019YJ0519）

刘鑫（1995-），男，硕士，助教，E-mail：liuxin102112@sina.com；通信作者：周宇飞（1995-），男，硕士，中级工程师，E-mail：2992372688@qq.com

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