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| 不同材料型材拉弯成形性的比较 |
| Comparison of Stretch-bending Formability between the Profiles of Aluminum Alloy and High Strength Steel |
| Received:May 13, 2009 Revised:July 10, 2009 |
| DOI： |
| 中文关键词: 型材拉弯 成形性； 车身轻量化； 铝合金； 高强度钢； 数值模拟； 成形缺陷 |
| 英文关键词: stretch-bending of profile formability bendability lightweight of car body aluminum alloy high strength steel numerical simulation forming defects |
| 基金项目: |
| Author Name | Affiliation | | ZHOU Xian-bin | School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, China | | GAO Hong-zhi | School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, China | | LI Xiao-xing | School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, China | | JIN Chao-hai | School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, China | | B.Criqui | Renault Technocentre. Guyancourt, 78288, France |
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| 中文摘要: |
| 介绍了型材拉弯成形性的比较方法，通过数值模拟，建立不同型材的拉弯成形性图，用于评估截面畸变等缺陷产生的难易；以某轿车门框复杂截面型材为例，进行了AA6060-T4和TRIP800两种型材拉弯成形性的对比，表明铝合金型材比钢型材具有更好的拉弯成形性，可得到较高的成形精度，有利于轿车车身轻量化设计。 |
| 英文摘要: |
| The section distortion and spring-back of profiles with complex closed section are common forming defects in stretch bending process. They are difficult to avoid and relate to the material, form and dimension of profile, and the processing parameters, which are involved with the stretch bending formability or bendability of profile. In the reasonable design of profile section and stretch bending process, it is demanded to consider comprehensively the weight and stiffness of part and its bendability. The comparison method on bendability between different profiles is presented in this paper. By numerical simulation, the bendability diagram of profiles can be build to evaluate the forming defects, such as the sagging and the thinning of upper wall of profile, and to compare the stretch-bending formability of profiles. Taking a profile with complex section of a car doorframe as an example, the stretch-bending formability between profile AA6060-T4 and profile TRIP800 are compared, the results show that the stretch-bending formability of profile AA6060-T4 is better than that of profile TRIP800. The former is easier to keep the stretch-bending precision and will be advantageous to the lightweight design of car body. |
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