| 斜壁盒形件多点拉延成形过程中起皱与拉裂预测 |
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| 引用本文： | 高海洲,苏世忠,李明哲. 斜壁盒形件多点拉延成形过程中起皱与拉裂预测[J]. 塑性工程学报, 2006, 13(4): 30-33 |
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| 作者姓名： | 高海洲 苏世忠 李明哲 |
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| 作者单位： | 吉林大学,无模成形技术开发中心,长春,130025 |
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| 摘 要： | 借助于LS-DYNA3D软件建立了多点拉延成形用有限元模型,采用BWC壳单元,BT壳单元以及六面体单元,对带法兰的斜壁盒形件多点拉延成形过程进行了数值模拟,获得了压边力和成形深度与起皱与拉裂关系的多点拉延成形的极限图。研究表明,压边力过小,法兰中部将明显起皱;压边力过大,斜壁角部将被拉裂;大小适度的压边力能够得到表面光顺的成形件,即将压边力控制在所给出的起皱极限与拉裂极限之间。
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| 关 键 词： | 盒形件 多点拉延成形 数值模拟 起皱 拉裂 |
| 文章编号： | 1007-2012（2006）04-0030-04 |
| 收稿时间： | 2005-04-22 |
| 修稿时间： | 2006-04-04 |
Prediction of wrinkling and crack during multi-point drawing forming process for rectangle cup with conical walls |
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| GAO Hai-zhou,SU Shi-zhong,LI Ming-zhe. Prediction of wrinkling and crack during multi-point drawing forming process for rectangle cup with conical walls[J]. Journal of Plasticity Engineering, 2006, 13(4): 30-33 |
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| Authors: | GAO Hai-zhou SU Shi-zhong LI Ming-zhe |
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| Affiliation: | Dieless Forming Technology Center, Jilin University, Changchun 130025 China |
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| Abstract: | Multi-point drawing forming(MPDF) process of rectangle cup with conical walls was simulated with BWC& BT shell element and hexahedron element by mean of LS-DYNA3D,and the relation of drawing depth and the blank-holder forces(BHF) on wrinkling limit and crack limit was analysized.The result proved that wrinkling happened in the middle of flange when the blank-holder force is too small,and crack happened in the bottom of the conical wall when the BHF is too large,the suitable BHF can result in better parts with smooth surface,while BHF value is between the wrinkling limit and crack limit. |
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| Keywords: | rectangle cup multi-point drawing forming numerical simulation wrinkling crack |
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