【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。更多还原

【Abstract】 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.更多还原