| 铝合金拉形粗晶临界预应变曲线的建立及应用 |
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| 引用本文： | 王昆,万敏,华程,邵旭分.铝合金拉形粗晶临界预应变曲线的建立及应用[J].北京航空航天大学学报,2013,39(4):508-511,516. |
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| 作者姓名： | 王昆 万敏 华程 邵旭分 |
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| 作者单位： | 北京航空航天大学机械工程及自动化学院,北京,100191;成都飞机工业集团公司制造工程部,成都,610092 |
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| 基金项目： | 国家863计划资助项目(2007AA04Z1A3);国防基础科研资助项目(D0620060428) |
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| 摘 要： | 粗晶是铝合金蒙皮多道次拉形中常见的成形缺陷.根据实际蒙皮拉形过程和变形状态,按照"预拉伸-淬火-微观组织分析"的流程,对2024-O铝合金板材进行了不同应变路径下的试验,建立了晶粒大小和热处理前预拉伸量的关系.采用网格应变测量技术,确定了不同应变路径下的粗晶临界预应变,建立了粗晶临界预应变曲线.应用该曲线对蒙皮拉形过程进行了有限元分析,从而控制粗晶的产生.
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| 关 键 词： | 铝合金 拉伸成形 淬火 粗晶 临界预应变 |
| 收稿时间： | 2012-03-25 |
Determination and application of coarse-grain critical pre-strain curve to aluminum alloy stretch forming |
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| Wang Kun Wan MinSchool of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics,Beijing,China Hua Cheng Shao Xufen.Determination and application of coarse-grain critical pre-strain curve to aluminum alloy stretch forming[J].Journal of Beijing University of Aeronautics and Astronautics,2013,39(4):508-511,516. |
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| Authors: | Wang Kun Wan MinSchool of Mechanical Engineering and Automation Beijing University of Aeronautics and Astronautics Beijing China Hua Cheng Shao Xufen |
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| Institution: | 1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;2. Department of Manufacturing Engineering, Chengdu Aircraft Industries Co. Ltd., Chengdu 610092, China |
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| Abstract: | Coarse-grain is one of the main defects in multistage stretch forming of airplane skins for aluminum alloy. An experiment of different strain paths to 2024-O aluminum alloy was designed according to the deformation state and process in skin stretch forming. The experiment process was pre-stretch, quench heat treatment and microstructure analysis, from which the relationship between grain size and deformation before heat treatment was established. The critical pre-strains of different strain paths were obtained through grid strain measurement, and the critical pre-strain curve was determined. The finite element analysis of an airplane skin was carried out combined with the critical pre-strain curve, and the coarse-grain was controlled. |
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