摘要
As one of the advanced and efficient means of joining,the clinching process is capable of joining sheets with different materials or different sheet thicknesses.In this article,a novel modified clinching process,i.e.,the dieless clinching process,was executed to join AA6061 aluminum alloy with sheet thicknesses of 1.5,2.0,2.5 and 3.0 mm according to different sheet stack-ups.The geometrical characteristics,microhardness distribution,failure behavior,static strength,absorbed energy and instantaneous stiffness of the novel dieless joint were gotten and investigated.The results indicated that the sheet thickness ratio has a notable effect on the failure behavior and mechanical properties of the novel dieless clinched joint,and a relatively large sheet thickness ratio can improve the joint performance when joining sheets with different sheet thicknesses.
作为一种先进且高效的连接方法,压力连接工艺可以实现不同材料或不同厚度板材的连接。本文提出了一种改进的压力连接工艺,即新型无模压力连接工艺,并利用该工艺开展了1.5 mm、2.0 mm、2.5 mm和3.0 mm四种厚度的AA6061铝合金板材的连接实验,研究了接头的几何特征、显微硬度分布、失效行为、静态强度、能量吸收以及瞬时刚度。结果表明,板厚比对新型无模压力连接接头的失效行为和力学性能有显著影响,较大的板厚比有助于提升接头性能。
作者
QIN Deng-lin
CHEN Chao
秦登林;陈超(Light Alloy Research Institute,School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;State Key Laboratory of High Performance Complex Manufacturing(Central South University),Changsha 410083,China)
基金
Project(51805416) supported by the National Natural Science Foundation of China
Project(2019QNRC001) supported by the Young Elite Scientists Sponsorship Program by CAST,China
Project(2021JJ20059) supported by the Hunan Provincial Natural Science Foundation for Excellent Young Scholars,China
Project(2019RS1002) supported by the Huxiang High-Level Talent Gathering Project of Hunan Province,China。
