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Evaluation of Welding Characteristics on 3-lap Spot Joint of Zinc Coned Seel Sheet md High Seength Steel Sheet  

Kwon Il-Hyun (Faculty of Mechanical and Aerospace Engineering, Automobile High Technology Research Center)
Kim Hoi-Hyun (Department of Mechanical Engineering, Graduate School, Chonbuk University)
Baek Seung-Se (Department of Mechanical Engineering, Graduate School, Chonbuk University)
Yang Seong-Mo (Faculty of Mechanical and Aerospace Engineering, Automobile High Technology Research Center)
Yu Hyo-Sun (Faculty of Mechanical and Aerospace Engineering, Automobile High Technology Research Center)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.5, 2005 , pp. 42-49 More about this Journal
Abstract
In general, multi-lap spot weld joints are frequently present in automobile. Most research, however, has been focused on the single-lap spot weld joints until now. In this paper, tensile-shear strength tests are performed to examine the weldability of 3-lap spot joint welded by using the high strength steel sheet and the zinc coated steel sheet. The indentation depth and nugget diameter are used to propose the optimum welding conditions. The weldability is affected by the welding current and welding time for 3-lap spot joint. Meanwhile the expulsions is round to decrease with the increase of electrode force. The optimum welding conditions are presented for 3-lap spot joints of high strength steel sheet and zinc coated steel sheet.
Keywords
Tensile-shear strength; Weldability; 3-lap spot joint; Indentation depth; Nugget diameter; Optimum welding condition;
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