谷珊珊,郎利辉,孔德帅,等.铝合金矩形截面管充液成形工艺研究[J].精密成形工程,2015,7(4):6-10,21.
GU Shan-shan,LANG Li-hui,KONG De-shuai,et al.Process Research on Tube Hydroforming of Aluminum Alloy Tube with Rectangular Section[J].Journal of Netshape Forming Engineering,2015,7(4):6-10,21. |
| 铝合金矩形截面管充液成形工艺研究 |
| Process Research on Tube Hydroforming of Aluminum Alloy Tube with Rectangular Section |
| 投稿时间：2015-05-06 修订日期：2015-07-10 |
| DOI：10.3969/j.issn.1674-6457.2015.04.002 |
| 中文关键词: 弯曲 低压预成形 充液成形 有限元模拟 |
| 英文关键词: bending low pressure preforming tube hydroforming finite element modeling |
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| 摘要点击次数: 4030 |
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| 中文摘要: |
| 目的 研究低延伸率和低厚向异性指数的铝合金管,在充液成形过程中的材料变形行为。方法 采用低压预成形的方法来改善管坯材料的流动,并与传统不带内压的预成形结果进行了对比。 结合有限元分析手段研究了铝管弯曲过程管坯尺寸、弯曲半径的选择对零件壁厚分布的重要性。 结果 有限分析方法结合试验研究表明,低压预成形可以有效抑制铝合金弯曲轴线管件的开裂。 结论 初始管材截面外壁周长应等于或略小于模具截面内壁周长;弯曲半径的选取要兼顾弯曲工艺难度和管坯贴模度;低压预成形能够大大改善矩形截面过渡圆角区的材料流动,避免破裂、死皱等典型缺陷的发生。 |
| 英文摘要: |
| The aim of this study was to investigate the material deformation behavior of aluminum alloy with low elongation and thickness anisotropy index during the tube hydroforming process. The method of low pressure pre-forming was conducted to improve the material flowing, and the results were compared with those by traditional pre-forming without pressure. The effect of tube dimensions and the bending radius on the wall thickness distribution during the bending process was analyzed by FEM. The FEM and experimental researches proved that the cracking of aluminum alloy curved tube can be restrained effectively through low pressure pre-forming. The initial outer diameter of the tube should be equal to or slightly less than the inside perimeter of the mold section. It is necessary to consider the difficulty of bending process and the tube's position in the mold while choosing the bending radius. The material flowing of rectangular section transition fillet area can be greatly improved by the method of low pressure pre-forming, avoiding defects such as cracks and wrinkles. |
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