锻压技术

大尺寸内齿轮冷挤压成形工艺研究

英文标题：Technical research on cold extrusion of large size internal gear

作者：李建平夏祥生万元元陶健全车路长

关键词：大尺寸内齿轮冷挤压数值模拟

分类号：TG376.3

出版年,卷(期):页码：2013,38(3):7-11

摘要：

对大尺寸内齿轮挤压成形过程进行数值模拟，系统地研究了坯料尺寸、摩擦系数和坯料入口角对挤压成形性能的影响，并对挤压成形工艺进行了优化。研究结果表明：坯料尺寸、摩擦系数和坯料入口角对挤压成形过程存在显著影响。当坯料内孔直径尺寸介于内齿轮的分度圆直径与冲头齿根圆直径之间时，内齿轮齿形充填均匀，齿形饱满。采用优化后的工艺对大尺寸内齿轮进行冷挤压成形试验，结果表明，提出的冷挤压成形工艺方案合理可行。

The numerical simulation was conducted for the extrusion process of the large size internal gear, and the effects of stock size, friction coefficient and punch inlet angle on extrusion deformation were studied, and extrusion process parameters were optimized. Results show that extrusion performance is affected notably by stock size, friction coefficient and punch inlet angle. When the diameter of stock aperture was between reference diameter of internal gear and the diameter of punch tooth root circle, the internal gear was filled evenly and fully. Cold extrusion test was carried out for the large size internal gear using the optimized parameters obtained. Results show that the technology for cold extrusion of large size internal gear is reasonable.

基金项目：

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