锻压技术

太阳轮内外齿冷挤压成形工艺方案研究

英文标题：Research on cold extrusion process for sun gear with internal-external tooth

分类号：TG376

出版年,卷(期):页码：2016,41(12):72-76

摘要：

太阳轮是行星齿轮传动机构中重要的零件，针对太阳轮的结构特点提出了一次成形和分步成形的两种冷挤压成形外齿和内花键的工艺方案。运用Deform-3D塑性有限元分析软件对这两种方案的成形过程进行数值模拟，并对其成形过程和成形质量进行了分析比较。数值模拟和工艺试验表明：太阳轮可以通过分步冷挤压成形的工艺方法成形出质量合格的内花键和外齿；分步成形的工艺方法能够简化凸模结构和提高模具使用寿命，同时可以避免一次成形工艺方法中由于金属堆积等因素造成的质量缺陷；分步成形工艺方法中增加了精整外齿工艺，在保证内花键成形质量的同时提高了外齿的成形质量。

The sun gear is an important part of the planetary gear transmission mechanism. Based on the structural feature of sun gear， two cold extrusion designs on internal-external tooth and spline process were put forward by one-time and step-by-step extrusion. Then, the above two processes were numerically simulated by Deform-3D plastic finite element analysis software，and the forming process and forming quality were analyzed and compared. The numerical simulation and experiment indicate that the inner spline and external tooth of the sun gear can be formed by step-by-step cold extrusion. Step-by-step forming process method can simplify the structure of punch and prolong the service life of die，at the same time，it is a very good way to avoid metal accumulation and other quality defects which are produced by one-time forming process. Therefore, an external gear cold sizing process is added in slep-by-step forming process，and the forming quality of the external gear is improved while ensuring the quality of the internal spline.

基金项目：

重庆市科委资助项目(cstc2014yykfA60001)；重庆市教委科学技术研究资助项目(KJ1400944)

作者简介：冯文杰（1964-），男，硕士，教授 E-mail：wjfeng@cqut.edu.cn

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