锻压技术

薄壁内外齿形件旋压成形机理

英文标题：Spinning mechanism of thinwalled internal and external toothed parts

作者：余林峰徐晓夏琴香赵杰

单位：华南理工大学

分类号：TG306

出版年,卷(期):页码：2021,46(5):86-93

摘要：

针对内外齿形件在旋压成形时容易出现齿形角不对称、齿侧壁厚分布不均及齿顶圆角填充不饱满的问题，采用数值模拟与成形试验相结合的方法，对薄壁内外齿形件旋压成形时的应力与应变分布、材料变形特点以及材料流动情况进行了研究；通过总结应力、应变分布规律及材料变形规律，揭示了其成形机理。结果表明：薄壁内外齿形件旋压成形过程是剪切变形与挤压的复合成形；成形过程中接触区域均处于三向应力状态；内外齿稳定成形区域处于平面应变状态，口部裙边与底部飞边为压缩类应变状态；因内外齿形的形状特点，旋压成形时材料变形具有周期性、不均匀性和不对称性的特点；材料整体流动与旋轮啮合方向一致。

For the problems of asymmetric tooth profile angle, uneven distribution of tooth sidewall thickness and insufficient filling of tooth tip fillet in the spinning process of internal and external toothed parts, the stress and strain distributions, material deformation characteristics and material flow situations of the thin-walled internal and external toothed parts during the spinning process were studied by combining numerical simulation with forming test, and the forming mechanism was revealed by summarizing the distribution laws of stress and strain and the deformation law of material. The results show that the spinning process of the thin-walled internal and external toothed parts is a composite forming of shear deformation and extrusion, the contact area is in three-dimensional stress state, the stable forming areas of internal and external teeth are in the plane strain state, and the mouth skirt and bottom flash are in the compression strain state. Because of the shape characteristics of internal and external teeth, the material deformation during the spinning process has the characteristics of periodicity, non-uniformity and asymmetry, and the whole material flow is consistent with the meshing direction of roller.

基金项目：

国家自然科学基金资助项目（51775194）

余林峰（1996-），男，硕士研究生 E-mail：18826076197@163.com 通讯作者：夏琴香（1964-），女，博士，教授 E-mail：meqxxia@scut.edu.cn

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