铝合金拉形粗晶临界预应变曲线的建立及应用

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

1.
北京航空航天大学机械工程及自动化学院, 北京 100191
2. 成都飞机工业集团公司制造工程部, 成都 610092

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)

详细信息

中图分类号: TG 386; TG 166.3
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出版历程
- 收稿日期: 2012-03-25
- 网络出版日期: 2013-04-30

Determination and application of coarse-grain critical pre-strain curve to aluminum alloy stretch forming

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

摘要

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.
- 铝合金 /
- 拉伸成形 /
- 淬火 /
- 粗晶 /
- 临界预应变
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.
- aluminum alloy /
- stretch forming /
- quench heat treatment /
- coarse-grain /
- critical pre-strain

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参考文献(10)

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