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.
参考文献
[1] | MILLERJ E;KYRIAKIDES;BASTARD A. H .Onbend-stretchformingofaluminumextrudedtubes-Ⅰ:experiments[J].International Journal of Mechanical Sciences,2001,43(05):1283-1317. |
[2] | Frank Vollertsen;Axel Sprenger;Jurgen Kraus;Horst Arnet .Extrusion, channel, and profile bending: a review[J].Journal of Materials Processing Technology,1999(1/3):1-27. |
[3] | CLAUSENAH;HOPPERSTAD OS;LANGSETH M .SensitivityofModelparametersinstretchbendingofaluminiumextrusions[J].International Journal of Mechanical Sciences,2001,43(02):427-453. |
[4] | PAULSENF;WELO T .Cross-sectionaldeformationsofrectangularhollowsectionsinbending:PartⅠ-experiments[J].International Journal of Mechanical Sciences,2001,43(01):109-129. |
[5] | Frode Paulsen;Torgeir Welo .A design method for prediction of dimensions of rectangular hollow sections formed in stretch bending[J].Journal of Materials Processing Technology,2002(1/3):48-66. |
[6] | Lademo OG;Langseth M;Hopperstad O.S. - .An evaluation of yield criteria and flow rules for aluminium alloys[J].International Journal of Plasticity,1999(2):191-208. |
[7] | 刁可山,周贤宾,金朝海.铝合金型材拉弯成形研究进展[J].塑性工程学报,2003(06):38-42. |
[8] | 金朝海;周贤宾;刁可山.铝型材拉弯成形有限元仿真关键技术研究[M].ChinaPAM学术年会论文集[C],北京,2002:236-239. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%