拉弯模具间隙对复杂截面型材成形精度的影响

郭涛; 李晓星

拉弯模具间隙对复杂截面型材成形精度的影响

郭涛,
李晓星

北京航空航天大学机械工程及自动化学院, 北京 100191

详细信息

中图分类号: TG 385
计量
- 文章访问数: 1934
- HTML全文浏览量: 178
- PDF下载量: 626
- 被引次数: 0
出版历程
- 收稿日期: 2012-08-01
- 网络出版日期: 2013-07-30

Stretch bending die clearance influence on forming accuracy to complex section profile

School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 采用有限元数值模拟方法对非对称复杂截面铝合金型材拉弯工艺过程进行研究,分析拉弯模具间隙对称和不对称两种情况对型材拉弯后的截面畸变及回弹的影响.结果表明型材拉弯后壁厚出现减薄,其最小厚度受间隙值影响较小,但左右间隙是否对称会影响截面畸变方向,左右间隙不对称时型材拉弯后其截面畸变方向会发生偏转,回弹后的扭转量也会有变化.以减小截面畸变和回弹量从而提高成形精度为目标,通过数值模拟分析对拉弯模具左右间隙值进行了优化,为合理设计拉弯成形模具提供理论依据,对制定生产工艺规范具有重要参考价值.
- 非对称截面 /
- 拉弯模具间隙 /
- 型材拉弯 /
- 成形精度 /
- 数值模拟
Abstract: The finite element analysis(FEA) method was adopted to simulate the stretch-bending process for complex asymmetric section aluminum alloy profile, and the effect on distortion and the influence of spring back due to die clearance of symmetry and asymmetry was studied. The results show that thickness change to thinner after bending, and the minimum thickness is with little effect from clearance, but the asymmetric will result the change of distortion direction, it will also change after spring back. To improve the forming accuracy by reducing the distortion and spring back, a numerical simulation analysis method was adopted to optimize the right and left clearance on the die. It also provides theoretical evidence for stretch-wrap bending die design.
- asymmetric-section /
- stretch bending die clearance /
- profile stretch bending /
- forming accuracy /
- numerical simulation

HTML全文

参考文献(9)

[1]	金朝海.铝合金型材拉弯成形有限元仿真建模及成型过程模拟 .北京:北京航空航天大学,2004 Jin Chaohai.Numerical modeling and simulation of stretch bending process for extruded aluminum alloy profiles .Beijing:Beijing University of Aeronautics and Astronautics,2004(in Chinese)
[2]	Frode Paulsen,Torgeir Welo．Application of numerical simulation in the bending of aluminium-alloy profiles[J]．Journal of Materials Processing Technology,1996,58:274-285
[3]	刁可山.铝合金型材拉弯成形研究进展[J].塑性工程学报,2003,10(6):38-42 Diao Keshan.The study on stretch-bending process for aluminum extrusions[J].Journal of Plasticity Engineering,2003,10(6):38-42(in Chinese)
[4]	高宏志,周贤宾,李东升.硬铝合金预拉伸、热处理后成形性能的正交试验研究[J].航空材料学报,2004,24(4):1-7 Gao Hongzhi,Zhou Xianbin,Li Dongsheng.Orthogonal test study of formability for 2D12 aluminum alloy after pre-stretching and solution heat-treatment[J].Journal of Aeronautical Materials,2004,24(4):1-7(in Chinese)
[5]	刘传香,于忠奇,来新民,等.不等厚截面铝型材拉弯尺寸精度参数化[J].塑性工程学报,2012(1):45-49 Liu Chuanxiang,Yu Zhongqi,Lai Xinmin,et al.Numerical analysis of stretch-bend forming precision of aluminum extrusion with unequal section[J].Journal of Plasticity Engineering,2012(1):45-49(in Chinese)
[6]	Clausen A H,Hopperstad O S,Langseth M.Sensitivity of model parameters in stretch-bending of aluminum extrusions[J].International Journal of Mechanical Sciences,2001(43):427-453
[7]	鱼二强,贺尔铭,王红建.非对称型材拉弯成形的数值模拟研究[J].科学技术与工程,2011,11(15):3476-3480,3493 Yu Erqiang,He Erming,Wang Hongjian.Numerical simulation study in stretch bending process for symmetrical section profile[J].Science Technology and Engineering,2011,11(15):3476-3480,3493(in Chinese)
[8]	Hopperstad O S,Leira B J,Remseth S.Reliability-based analysis of a stretch-bending process for aluminum extrusions[J].Computers and Structures,1999(71):63-75
[9]	李小强,周贤宾,金朝海,等.基于有限元模拟的三维型材拉弯轨迹设计[J].航空学报,2009,30(3):544-550 Li Xiaoqiang,Zhou Xianbin,Jin Chaohai,et al.Design of stretch bending trajectory based on finite element simulation for three-dimensional profile parts[J].Acta Aeronautical Et Astronautics Sinica,2009,30(3):544-550(in Chinese)