基于热力耦合的热挤压模具结构参数优化设计.PDFVIP

1, 2 2 2 倪正顺 帅词俊 钟 掘 1. 株洲工学院机械工程系, 株洲, 412008 2. 中南大学机电工程学院, 长沙, 410083 : 利用基于有限变形理论的热力耦合基本方程, 对方管铝型材平面 分流组合模进行了三维热力耦合计算分析发现应力集中明显, 且其部位 与模桥裂纹位置相吻合为改善模具体内应力分布, 对该模具的主要结构 参数进行了优化设计经过21 次迭代计算, 获得最优结构尺寸, 使最大应 力下降32. 2%, 从而延长了模具的使用寿命 : ; ; ; : TG375. 4 : 1004- 132 ( 2004) 09- 0757- 04 Optimal Design of Structural Parameters of Hot Extrusion Dies Based on the Thermal- mechanical Coupling 1, 2 2 2 Ni Zhengshun Shuai Cijun Zhong Jue 1. Zhuzhou Institute of Technology, Zhuzhou, 412008 2. Central South University, Changsha, 410083 库 Abstract: Using the thermal- mechanical coupling fundam ental equations based on finite strain theory, a three- dimensional thermal- mechanical coupling calculation w as carried out to the aluminum square pro- 例 file hot extrusion porthole compound die. It is found that there exists an obvious stress concentration at the 案 location where the bridge crack takes place. In order to im prove the distribution of stresses in the die, the E optimal design on the m ain structural parameters w as completed. The optimal values, w hich make the m ax- A n c imum stress be w eakened by 32. 2% , w as achieved after 21 iterations, the service life of the die is therefore