Study Of Technology Of Self-Piercing Riveting Of Half-Hollow Rivets

Fuel economy is a everlasting issue of the automotive industry.Lightweight of the auto-mobile is one of the important measures.The application of lightweight materials (such as aluminum and plastic etc) is expected to show significant effect on reducing the weight of automobiles. Lightweight materials are generally not suitable to resistance spot welding. In this paper, a new joining approach---self-piercing riveting of half-hollow rivets,is investiga-ted. Firstly, the feasibility of self-piercing riveting of half-hollow rivets was experimentally validated. In the experiments, five kinds of specimens (1-mm thick aluminum for 2-mm thick aluminum, 0.4-mm thick brass for 2-mm thick aluminum,1-mm thick aluminum for 1-mm thi-ck aluminum,0.4-mm thick brass for 1-mm thick aluminum,and,2-mm thick aluminum for 2-mm thick aluminum) were tested on a WE-30 testing machine with data collection system, dies and 3 kinds of rivets were developed by ourselves . Displacement-load curve in the rivet-ing process were obtained, and the test results are analyzed and evaluated. Factors affecting the riveting quality are analyzed and an amended scheme to acquire high-quality riveting res-ults is proposed. Secondly, numerical simulations are performed using DEFORM and MSC.SUPERFO-RM software to simulate the riveting process separately. Comparing the simulating results with the experimental results, it can be concluded that MSC.SUPERFORM is prior to DEFORM in pre-processing and calculating speed. The simulating results of MSC.SUPERF-ORM are agreed to the experimental results .It is feasible to use MSC.SUPERFORM to simulate the riveting process. Finally, parametric modeling scheme of self-piercing riveting of half-hollow rivets is put Forward.