锻压技术

星形套冷挤压成形模具结构分析及优化

英文标题：Structural analysis and optimization of the cold extrusion mould of star sleeve workpiece

作者：魏志刚汤文成刘德仿

单位：东南大学机械工程系东南大学机械工程系盐城工学院南京210096 南京210096 江苏盐城224003

关键词：模具有限元结构优化

分类号：TG375.41

出版年,卷(期):页码：2006,31(4):59-64

摘要：

对星形套和模具建立弹塑性有限元模型,采用准静态的热机耦合分析对行星套冷挤压过程进行模拟,得出较为准确的模具应力分布;对应力结果进行分析,找到减少应力集中的办法,改进了模具的结构,对模具应力场进行重新分析,仿真结果和实际符合很好,较大程度地提高了模具的使用寿命。对冷挤压成形的有限元仿真以及塑性成形工艺控制和提高模具寿命具有指导意义。

The course of cold extrusion of the star sleeve workpiece is simulated by the 3-D elasto-plastic coupled thermal-mechanical FEA method,using the advanced nonlinear FEA analysis software-MSC.MARC.The stress distribution on the mould is obtained;Then the result is analyzed and a method to reduce the concentration of the stress is found,and so the structure of the mould is modified;The structure is analyzed again based on the new model.The result make a good agreement to the practice and the serve life of the mould is prolonged obviously.This article plays a guiding role on the aspects of simulating the cold extrusion,controlling of the technical parameter and improving the life of the mould.

基金项目：

江苏省科技攻关资助项目(农业,苏北星火带部分)(BE2004372)

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