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摘要：
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压料面是工艺补充的一个重要组成部分,对汽车覆盖件的拉深成形起着重要作用。通过数值模拟的方法研究了局部凸柱面压料面形式对方盒形件拉深成形的影响,获得了局部凸柱面压料面形式对毛坯变形区应变分布影响的规律。结果表明:压料面形状在很大程度上决定了毛坯变形区的应力状态,通过控制压料面形状可以控制材料的变形流动;上凸压料面可以改善局部板平面内的压应力状态,减小起皱,提高成形性。
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Blank-hold surface is an important part of process supplement, which remarkably influences the deep drawing of auto body panel. The numerical method was performed to investigate the effect of local convex cylindrical blank-hold surface on square box part deep drawing, and the strain distribution law in the blank was accordingly discussed. Numerical results show that the shape of blank-hold surface greatly determines the stress state of deformation region in the blank, and the deformation flow pattern can be controlled by adjusting the shape of blank-hold surface. The local convex cylindrical blank-hold surface plays a positive role in improving the local compressive stress state induced in the blank, thus resulting in wrinkle suppression and enhanced formability.
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基金项目：
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作者简介：
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参考文献：
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[1]刘大海,崔令江,闫飞昊.下凹曲面压料面方盒件拉深成形的有限元模拟[J].塑性工程学报,2007,14(3):64-67.
[2]魏乐愚,鄂大辛.压料面形式对矩形盒拉深成形影响的数值模拟[J].锻压技术,2006,31(3):39-42.
[3]魏乐愚,鄂大辛.矩形盒在曲面压料面下拉深成形规律的有限元仿真[J].现代制造工程,2005,(6):45-60.
[4]Yang Yuying.Effect of types of blank-holder surface on box part drawing[J].Journal of Materials Processing Technolo-gy,2000,105:38-41.
[5]杨玉英,徐伟力,邢忠文.球面压料面对方盒形件成形的影响[J].塑性工程学报,1997,4(3):28-32.
[6]徐伟力,郭刚,李雪春,等.柱面压料面形式对矩形盒件拉深成形的影响[J].塑性工程学报,1998,5(2):45-49.
[7]鄂大辛.非回转对称拉深变形规律的研究——薄板矩形盒形件拉深的形状特性[J].中国机械工程,2002,13(2):137-140.
[8]鄂大辛,庞愉平,水野高尔.非回转对称拉深中法兰材料变形规律的研究[J].中国机械工程,2004,15(5):462-464.
[9]王永志,杨玉英,金朝海.方盒形件拉深法兰区不均匀流动的模拟分析[J].材料科学与工艺,2004,12(1):99-102.
[10]杨玉英.盒形件成形机理的探讨[J].锻压技术,1989,14(6):13-17.
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