| 复杂截面型材力控制拉弯成形数值模拟分析 |
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| 引用本文： | 刁可山,周贤宾,金朝海,李晓星.复杂截面型材力控制拉弯成形数值模拟分析[J].材料科学与工艺,2004,12(4):413-416. |
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| 作者姓名： | 刁可山 周贤宾 金朝海 李晓星 |
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| 作者单位： | 北京航空航天大学,板料成形研究中心,北京,100083 |
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| 摘 要： | 复杂截面挤压型材的高精度拉弯成形是制造框架式车身的关键技术.本文基于动态显式有限元软件PAM-STAMP,针对一种典型的框架武车身用复杂截面挤压型材,对其力控制方式的直进台面式拉弯成形进行了数值模拟研究,对比分析了两种截面形状的型材截面畸变和回弹随补拉力增大的变形规律,并得到了摩擦系数对成形精度的影响.数值模拟结果表明,增加型材截面的变形刚度,可以显著地减小截面畸变和回弹;增加补拉力,增大了截面畸变但减小了回弹;增大摩擦系数,截面畸变量减小而回弹增加.
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| 关 键 词： | 铝合金型材 拉弯成形 数值模拟 截面畸变 回弹 复杂截面 挤压型材 力控制 拉弯成形 数值 模拟分析 cross section complex aluminum extrusion bending stretch 畸变量 变形刚度 模拟结果 影响 成形精度 摩擦系数 变形规律 拉力 回弹 |
| 文章编号： | 1005-0299(2004)04-0413-04 |
| 修稿时间： | 2004年5月7日 |
A numerical study on the force-controlled stretch bending of aluminum extrusion with complex cross section |
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| DIAO Ke-shan,ZHOU Xian-bin,JIN Chao-hai,LI Xiao-xing.A numerical study on the force-controlled stretch bending of aluminum extrusion with complex cross section[J].Materials Science and Technology,2004,12(4):413-416. |
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| Authors: | DIAO Ke-shan ZHOU Xian-bin JIN Chao-hai LI Xiao-xing |
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| Abstract: | The high precision stretch bending of aluminum extrusion is the key technology for aluminum space frame (ASF) car body. A numerical study on the force-controlled forming process for two typical kinds of car used extrusion using dynamic explicit FEM software PAM-STAMP is presented. The effect of cross section rigidity, post-stretching force on forming precision is investigated. It is shown that increasing the rigidity of cross section can decrease cross section distortion and springback. The larger is the post-stretching force, the larger is the cross section distortion. Increasing post-stretching force can reduce springback effectively. The effect of friction coefficient is also investigated, finding that increasing the friction coefficient will decrease the cross section distortion and increase the springback. |
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| Keywords: | aluminum extrusion stretch bending numerical simulation cross section distortion springback |
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