| 基于热力耦合的热挤压模具结构参数优化设计 |
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| 引用本文： | 倪正顺,帅词俊,钟掘.基于热力耦合的热挤压模具结构参数优化设计[J].中国机械工程,2004,15(9):757-760. |
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| 作者姓名： | 倪正顺 帅词俊 钟掘 |
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| 作者单位： | 1. 株洲工学院机械工程系,株洲,412008;中南大学机电工程学院,长沙,410083
2. 中南大学机电工程学院,长沙,410083 |
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| 基金项目： | 高等学校博士学科点专项科研基金资助项目( 2 0 0 10 5 3 3 0 10 )，湖南省教育厅科研基金资助项目 ( 0 2C65 2 ) |
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| 摘 要： | 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。
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| 关 键 词： | 热力耦合 优化设计 热挤压模具 使用寿命 |
| 文章编号： | 1004-132X(2004)09-0757-04 |
Optimal Design of Structural Parameters of Hot Extrusion Dies Based on the Thermal-mechanical Coupling |
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| Ni Zhengshun , Shuai Cijun Zhong Jue .Zhuzhou Institute of Technology,Zhuzhou, .Central South University,Changsha.Optimal Design of Structural Parameters of Hot Extrusion Dies Based on the Thermal-mechanical Coupling[J].China Mechanical Engineering,2004,15(9):757-760. |
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| Authors: | Ni Zhengshun Shuai Cijun Zhong Jue Zhuzhou Institute of Technology Zhuzhou Central South University Changsha |
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| Affiliation: | Ni Zhengshun 1,2 Shuai Cijun 2 Zhong Jue 2 1.Zhuzhou Institute of Technology,Zhuzhou,412008 2.Central South University,Changsha,410083 |
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| Abstract: | Using the thermal-mechanical coupling fundamental equations based on finite strain theory, a three-dimensional thermal-mechanical coupling calculation was carried out to the aluminum square profile hot extrusion porthole compound die. It is found that there exists an obvious stress concentration at the location where the bridge crack takes place. In order to improve the distribution of stresses in the die, the optimal design on the main structural parameters was completed. The optimal values, which make the maximum stress be weakened by 32.2%, was achieved after 21 iterations, the service life of the die is therefore prolonged. |
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| Keywords: | thermal-mechanical coupling optimal design hot extrusion die service life |
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