锻压技术

控制凸轮挤压成形模优化设计

英文标题：Optimal design on extrusion mold for control cam

作者：匡余华

单位：南京工业职业技术学院

分类号：TG316

出版年,卷(期):页码：2020,45(6):141-145

摘要：

选择何种类型的零件毛坯是决定零件质量和性能的重要因素。以控制凸轮为案例，对控制凸轮采用半固态挤压精密铸造成形生产工艺中出现的产品质量问题进行了分析，制定了控制凸轮冷镦成形的生产工艺。针对控制凸轮冷镦生产中出现的质量问题，设计了控制凸轮整形与四方孔一次成形的挤压模具；分析了挤压模在使用中出现挤压凸模过早折断的原因，并结合挤压凸模有限元受力分析，优化了挤压凸模的结构，改善了挤压凸模的受力状况，提高了挤压凸模寿命。实践证明，采用优化后的挤压凸模可使控制凸轮零件的质量更稳定、可靠，同时提高了生产效益。

The selection of blank type is a crucial factor which determines the quality and performance of part. For the control cam, the product quality issue in the production technology caused by precise casting through semi solid extrusion to produce the control cam was analyzed, and the production technology of cold upsetting for control cam was formulated. Then, for the quality issue emerged during the cold upsetting manufacture of control cam, the extrusion mold of shaping and square hole forming at one time for the control cam was designed, and the reason why the extrusion punch fracture prematurely in use was analyzed. Combined with finite element stress analysis of extrusion punch, the structure of extrusion punch was optimized to improve the stress condition of extrusion punch and its life. The practice shows that the quality of control cam parts produced by optimized extrusion punch is more stable and reliable, and at the same time the production efficiency is improved.

基金项目：

2016年度江苏高校科研面上项目（16KJB430033）

匡余华（1962-），男，硕士，教授 E-mail：kuangyh@niit.edu.cn

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