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| Cu/Al双金属复合管旋压复合成形规律研究 |
| Forming Characteristics of Cu/Al Bimetal Tube Spinning |
| Received:June 10, 2018 Revised:July 10, 2018 |
| DOI：10.3969/j.issn.1674-6457.2018.04.007 |
| 中文关键词: 双金属管 旋压 有限元 壁厚分布 旋轮安装角 |
| 英文关键词: bimetallic tube spinning finite element thickness distribution roller installation angle |
| 基金项目:国家自然科学基金（BK20170788）；国家重点研发计划（2017YFB0703301） |
| Author Name | Affiliation | | YUAN Qi-wei | a. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China | | WANG Jian-hua | b. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China | | JIN Kai | b. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China | | TAO Jie | a. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China |
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| 中文摘要: |
| 目的 探究双金属管材在复合过程中的受力变化以及关键工艺参数对覆管和基管壁厚分布的影响。 方法 通过有限元仿真技术和实验相结合，对铜和铝两种材料的双金属管进行旋压复合成形过程受力情况以及壁厚变化进行研究。结果 覆管由于受力面积小于基管，导致各自承受的应力具有明显差异。另外，在双金属管旋压复合时，覆管屈服强度需大于基管，否则基管不会发生减薄塑性变形。在Cu/Al双金属管旋压过程中，随着压下量的减少，双金属管的减薄以覆管为主；随着旋轮安装角的减小，双金属管的减薄以基管为主。结论 通过对压下量和旋轮安装角的优化，可实现对覆管和基管壁厚分布的良好控制。 |
| 英文摘要: |
| The paper aims to explore changes of force in spinning process of bimetal tube and influences of key process parameters on wall thickness distribution of clad tube and metric tube. Through combining finite element simulation and experiment, the stress conditions and wall thickness changes in spinning forming process of bimetallic tubes of two kinds of materials were studied. The stress area of clad tube was smaller than that of matric pipe, resulting in a large difference in stress between clad tube and matric tube. In addition, the yield strength of clad tube should be greater than that of the matric tube; otherwise the matric tube would not have thinning deformation. During the spinning process of Cu/Al bimetallic tube, the thickness of clad tube and matric tube were changed. With the reduction of pressure amount, the thinning was dominated by the clad tube. With the reduction of the roller installation angle, the thinning is dominated by the matric tube. It is possible to control the distribution of clad tube and matric tube by adjusting the pressing force and the roller installation angle. |
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