锻压技术

泡沫铝三明治板材U型弯曲成形变压边力控制研究

英文标题：Study on variable blank holderforce control in foam aluminum sandwich panel U-bending

作者：孙振忠陈海彬

分类号：TG386

出版年,卷(期):页码：2010,35(4):44-48

摘要：

研究了泡沫铝三明治板材U型弯曲工艺，综合运用试验、塑性力学理论分析了泡沫铝三明治板材冲压成形边缘泡沫铝挤出、界面剥离、剪应力裂纹、拉伸裂纹、过度减薄等主要成形缺陷及形成机制。通过成形分析，提出了变压边力工艺控制方法。经过3个阶段变压边力控制，使成形深度由23.1 mm提高到40 mm左右，显著提高了AFS板材成形极限和成形质量。

U-bending process of aluminium foam sandwich (AFS) was studied. Major deformation defects of AFS forming, such as the specimen lateral foam extrusion, the delamination between panel and foam core, shear stress cracks of foam core, the tensile stress cracks of foam core and the excessive thinning of panels were analyzed synthetically by using experiments and plastic mechanics theory. And the deformation mechanism of AFS defects was studied also. Variable blank holder force（VBHF）control method was proposed by deformation analysis. The forming depth increases from 23.1 mm to 40 mm by three stage VBHF control, which has a good effect on promoting the forming limitation and the quality of AFS.

基金项目：

广东省自然科学基金资助项目（T301123）

参考文献：

［1］Banhart John. Manufacture,characterization and application of cellular metals and metal foams[J]. Progress in Meterials Science，2001，46:559-632.
［2］Gibson L G,Ashby M F.Cellular solids structure and properties[M].Cambridge：Cambridge University Press,1997.
［3］Song H W，Fan Z J，et al.Partition energy absorption of axially crushed aluminium foam-filled hat sections[J].International Journal of Solids and Structures,2005,42(910):2575-2600.
［4］Wang Q，Fan Z，Gui L.A theoretical analysis for the dynamic axial crushing behaviour of aluminium foam-filled hat sections[J]. International Journal of Solids and Structures，2006,43(78):2064-2075.
［5］Emmelmann H J, Bunsmann W, Seeliger W,et al. Complex shaped aluminium sandwich panel with aluminium foam[A]. International Conference on IBEC 97[C]. Stuttgart Germany,1997.
［6］Karsten Stobener，Joachim Baumeister，Dirk Lehmhus，et al. Composites base on metallic foams：phenomenology；
production；
properties and principles[A]. International Conference of Advanced Metallic Materials[C]. Slovakia,2003.
［7］Dirk Schwingel, Hans Wolfgang Seeliger, Claude Vecchionacci,et al. Aluminium foam sandwich structures for space applications[J]. Acta Astronautica, 2007,61:326-330.
［8］Hans Wolfgang Seeliger Manufacture of aluminum foam sandwich components[J]. Advanced Engineering Materials,2002,100:753-758.
［9］Contorno D, Filice L, Fratini L,et al. Forming of aluminum foam sandwich panels: Numerical simulations and experimental tests[J].Journal of Materials Processing Technology, 2006,177:364-367.
［10］孙振忠，何伟锋，陈盛贵.泡沫铝三明治板材弯曲成形试验研究[J].精密成形工程，2010,（2）：61-64.
［11］王曦, 虞吉林.泡沫铝的单向力学行为[J]. 实验力学, 2001, 16(4): 438-443.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】