Optimization of a reshaping rivet to reduce the protrusion height and increase the strength of clinched joints
Optimization of a reshaping rivet to reduce the protrusion height and increase the strength of clinched joints
复制标题
优化整形铆钉以降低突出高度并提高压接接头的强度
DOI：
10.1016/j.jmatprotec.2016.03.006
复制
发表时间：
2016-08-01
影响因子：
6.3
通讯作者：
Fan, Shuqin
中科院分区：
文献类型：
--
作者：
Chen, Chao;Zhao, Shengdun;Fan, Shuqin
传统的机械连接近年来受到越来越多的关注，但由于板材表面存在外露，影响连接性能，限制了机械连接的应用。为了减小接头突出高度，提高接头强度，提出了一种利用异形铆钉对接头进行整形的新方法。在整形过程中，将整形铆钉嵌入到紧固接头中，然后用一对平模一次冲压凸出部分。采用有限元模拟和正交设计方法，对整形铆钉的几何参数进行了横向抗拉强度优化。通过对25组不同组合的模拟，得到了整形铆钉的最佳几何参数组合。通过实验对比了重塑前后节点的静强度，验证了重塑方法的有效性。在试验中，节点的突出高度降低到1.0 mm。平均交叉拉伸强度从957.9 N提高到1154.9 N，拉剪强度从1229.4 N提高到2757.3 N。(C)2016爱思唯尔B.V.保留所有权利。
Conventional mechanical clinching attracted more and more attentions in recent years, but the application of mechanical clinching might be restricted because of the exterior protrusion above the sheets which could affect the performance of clinched joint. In order to reduce the protrusion height and increase the strength of clinched joints, a new method using a reshaping rivet to reshape the clinched joint was proposed in this paper. In the reshaping process, the reshaping rivet was embedded in the clinched joint, then the protrusion was compressed in a single stroke with a pair of flat dies. Finite element simulation and orthogonal design were used to optimize the geometrical parameters of the reshaping rivet in terms of cross-tension strength. The best combination of geometrical parameters of the reshaping rivet was gotten by simulating 25 groups of different combinations. Static strengths of the joints before and after reshaping were compared experimentally to validate the performance of the reshaping method. In the experiment, the protrusion height of the joints was reduced to 1.0 mm. The average cross-tension strength and tension-shearing strength were increased from 957.9 to 1154.9 N and from 1229.4 to 2757.3 N respectively. (C) 2016 Elsevier B.V. All rights reserved.