扁翼类零件挤压成形数值模拟及缺陷预测

采用基于Euler网格的有限体积法(FVM)对扁翼类零件的冷挤压成形过程进行数值模拟，研究变形过程中金属质点的流动情况与等效应变情况，分析挤压后期金属的应力矢量情况，为工艺改进和优化模具设计提供理论依据。总结出具有扁翼特征的零件在成形中变形区范围和变形程度的变化规律，揭示出扁翼类零件变形的不均匀性；预测出扁翼类零件的扁翼端部尤其是端部上顶面是可能出现成形缺陷的部位，这一结论得到了相关实验研究的验证。

Numerical simulation for the extruding of compressed aerofoil parts and the flaw prediction

This paper utilizes the Finite Volume Method to simulate cold extrusion process for compressed aerofoil parts. The purpose of the study is to reveal the forming regulation which contributes to the improvement of design. It studies the flow characteristics of the forming metal particles, analyzes the stress and strain of the metal. The research summarizes the deformation degree and areas transform regulations of a compressed aerofoil part in the extrusion process. And it also points out that the uneven deformation is a basic feature in the process. According to the analysis results of stress and strain, it predicts the possible flaw of the parts. Related experiments are also given in this paper.