锻压技术

冷敲花键相邻齿槽之间成形影响的分析

英文标题：Analysis on forming effect between adjacent cogging of cold strike spline

作者：牛婷李永堂王利民卢泓昱

分类号：TG315.79

出版年,卷(期):页码：2017,42(11):66-72

摘要：

在分析花键冷敲成形原理的基础上，采用ABAQUS/Explicit算法对花键冷敲相邻齿槽成形过程进行了有限元模拟仿真，研究了工件经过不同敲打次数后两个相邻齿槽的应力、应变分布规律。在自行研制的LQ200型冷敲设备上加工花键轴，利用光学显微镜研究冷敲花键不同成形区的显微组织形貌，以及不同成形区的影响层深度。结果表明：冷敲成形属于局部表层成形，敲打齿槽在敲击时应力波扩散到了相邻齿槽，应力波对相邻齿槽齿顶、齿侧、齿根的影响依次减小，敲打齿槽在敲击时对相邻齿槽的应变影响很小；齿顶成形区分度圆以上均为影响区，相比齿侧、齿根成形区，齿顶影响区范围最大；齿侧成形区的影响区深度大约为1 mm；齿根成形区的影响区深度大约为600 μm。

Based on the principle of cold strike forming for spline, the cold strike forming of adjacent cogging was simulated by ABAQUS/Explicit, and the stress and strain distributions of adjacent cogging by different striking times were analyzed. Then, a spline shaft was processed by the self-designed LQ200 spline cold striking equipment, and the microstructure and the influence depths of different forming zones were obtained by the optical microscope. The results show that the cold strike forming belongs to the local surface forming, and the stress wave of the striking cogging can spread to the adjacent cogging. Then, the influences of stress wave on tooth top, tooth flank and tooth root weaken gradually, and the influence on the strain of adjacent cogging is small when the striking cogging is struck. The experimental results show that the influence area of tooth top is above the pitch crack, and the influence area is larger than that of tooth flank and tooth roof. Therefore, the influence area is about 1 mm in the depth of tooth flank, and the influence area is about 600 μm in the depth of tooth roof.

基金项目：

国家自然科学基金资助项目（51475316）；山西省重点学科建设经费资助

作者简介：牛婷（1986-），女，博士研究生 E-mail：niuting861010@163.com 通讯作者：李永堂（1957-），男，博士，教授 E-mail：liyongtang@tyust.edu.cn

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