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http://dx.doi.org/10.5762/KAIS.2010.11.9.3155

Analysis of Weladbility on Resistance Spot Weld for 3 Steel Sheets of Automotive Car Body Using Simulation Method and Nugget Growth Curve  

Park, Young-Whan (Department of Mechanical Engineering, Pukyong National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.11, no.9, 2010 , pp. 3155-3160 More about this Journal
Abstract
Nowadays, most car manufactures have tried to improve fuel efficiency and corrosion resistance of car body. Therefore, use of high strength steels and coated steel becomes more and more increased. In this study, spot weld characteristics according to lap sequence of sheets were analyzed using simulation method for three different steel sheet of car body which were EDDQ class coated steel with 0.7t, high strength steel 440R with 1.2t and advanced high strength steel DP 590 with 1.0t. Using simulation, weldability was evaluated by nugget size of welded zone according to nugget growth curve and welding current with respect to lap sequence of sheets. Contact resistance of each sheets contact point was used to analyze formation of nugget and optimal lap sequence was suggested.
Keywords
Resistance spot welding; Numerical Simulation; Lap sequence; Nugget growth curve;
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