Influence of groove characteristics on strength of form-fit joints
Influence of groove characteristics on strength of form-fit joints
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DOI：
10.1016/j.jmatprotec.2010.08.004
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发表时间：
2011-05-01
影响因子：
6.3
通讯作者：
Tillmann, Wolfgang
中科院分区：
文献类型：
--
作者：
Weddeling, Christian;Woodward, Steven T.;Tillmann, Wolfgang
电磁成形 (EMF) 连接是一种创新的连接方法，例如：将挤压铝型材制成轻质框架结构，无需加热或穿透型材。本文介绍了通过电磁成型连接挤压铝型材，并考虑了工艺特点和接头设计。成形是由高能量密度的磁脉冲引发的，使得具有高电导率的材料在洛伦兹力的作用下变形。通过这种高速成型工艺，高强度接头可以制造为过盈配合、形状配合、冲击焊接接头或这些类型的组合。本文的重点是用于轻型框架结构的挤压铝型材的形状配合接头。基于基础技术研究，确定并分析了具体影响接头强度的参数。在这些实验中，凹槽几何形状的尺寸和形状各不相同。还分析了不同凹槽几何形状的作用磁压力和充电能量对接头强度的影响。 (C) 2010 Elsevier B.V. 保留所有权利。
Joining by electromagnetic forming (EMF) is an innovative method to connect, e.g. extruded aluminum profiles to lightweight frame structures without heating or penetrating the profile. This article describes the joining of extruded aluminum profiles by electromagnetic forming, taking into account the process characteristics and the joint design. Forming is initiated by a magnetic impulse of high energy density, such that material with high electrical conductivity is deformed by Lorentz forces. With this high-speed forming process high-strength joints can be manufactured as interference fits, form fits, impact welded joints or a combination of these types. The focus of this paper is on form-fit joints of extruded aluminum profiles for lightweight frame structures. Based on fundamental technological investigations the parameters which specifically affect the strength of the joints were identified and analyzed. Throughout these experiments the groove geometry was varied size and shape wise. The influence of the acting magnetic pressure and the charging energy on the joint strength was also analyzed for the various groove geometries. (C) 2010 Elsevier B.V. All rights reserved.