| 引用本文: | 郎利辉,王永铭,谢亚苏,徐应强,杨志恒,马宏珺.铝合金盒形件充液成形法兰变形特性及其失稳影响分析[J].材料科学与工艺,2013,21(4):37-43.DOI:10.11951/j.issn.1005-0299.20130407. |
| LANG Li-hui,WANG Yong-ming,XIE Ya-su,XU Ying-qiang,YANG Zhi-heng,MA Hong-jun.The flange deformation characteristics and its effect on failure in the hydroforming process of aluminum alloy rectangular cup[J].Materials Science and Technology,2013,21(4):37-43.DOI:10.11951/j.issn.1005-0299.20130407. |
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| 铝合金盒形件充液成形法兰变形特性及其失稳影响分析 |
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郎利辉1,王永铭1,谢亚苏1,徐应强2,杨志恒2,马宏珺3
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(1.北京航空航天大学 机械工程及自动化学院,北京 100191;2.上海飞机制造有限公司 钣金厂,上海 200436; 3.国家知识产权局专利局专利审查协作北京中心,北京 100081)
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| 摘要: |
| 通过有限元模拟和实验对铝合金盒形件充液成形过程进行研究,分析了铝合金盒形件充液成形法兰直边区和圆角区的变形特性,以及法兰变形对起皱和破裂等失稳形式的影响.结果表明：法兰圆角区变形复杂,存在径向压应力,根据变形特征可分为五个变形区；长直边法兰抗皱能力比短直边法兰小,容易起皱；短直边侧壁变薄量大,在与凸模圆角相切处的板料容易破裂；合理的压边间隙可以有效控制长直边法兰起皱和短直边侧壁破裂,实验结果证明了数值模拟结果的准确性. |
| 关键词: 充液成形 盒形件 铝合金 法兰变形 失稳控制 |
| DOI：10.11951/j.issn.1005-0299.20130407 |
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| 基金项目:华中科技大学材料成形与模具技术国家重点实验室开放基金资助项目(2010-T02). |
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| The flange deformation characteristics and its effect on failure in the hydroforming process of aluminum alloy rectangular cup |
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LANG Li-hui1,WANG Yong-ming1,XIE Ya-su1,XU Ying-qiang2,YANG Zhi-heng2,MA Hong-jun3
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(1.School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China; 2.Sheet Metal Factory,Shanghai Aircraft Manufacturing Corporation,Shanghai 200436,China; 3.Patent Examination Cooperation Center of the Patent Office,SIPO,Beijing 100081,China)
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| Abstract: |
| A hydroforming process of aluminum alloy rectangular cup was investigated by finite element simulation and experiments.The flange deformation characteristics in the straight edge and corner edge of rectangular cup were analyzed,and its effect on the failure model was also discussed.The results show that the deformation is complicated in corner edge of the flange.There is a little materials subjected to radial compressive stress.The corner edge of flange can be divided into five deformation areas.The ability of winkling resistance in long straight edge is lower than that in short straight edge.So the flange in long straight edge is easier to wrinkle.Thickness reduction in short side wall is larger than that in long straight side wall,the part will crack in punch nose if blank holder gap is too small.And reasonable blank holder gap can prevent the wrinkle and crack.The experimental results verify the numerical one. |
| Key words: hydroforming rectangular cup aluminum alloy flange deformation failures control |
