Research and Development > JFE TECHNICAL REPORT > JFE TECHNICAL REPORT No.18- Special Issue on "Steel Products for Energy Industries" and "Steel Sheets for Automotive and Electric Machinery and Appliance" > Development of Next Generation Resistance Spot Welding Technologies Contributing to Auto Body Weight Reduction
No.18 April 2013 - Special Issue on "Steel Products for Energy Industries" and "Steel Sheets for Automotive and Electric Machinery and Appliance"
Development of Next Generation Resistance Spot Welding Technologies Contributing to Auto Body Weight Reduction
MATSUSHITA Muneo TANIGUCHI Koichi OI Kenji
Abstract
New generation resistance spot welding technologies were developed to reduce the weight of auto body. By varying the force and welding current during welding, Intelligent SpotTM welding made it possible to perform easier three-sheet-lap-welding more frequently performed with increased application of high strength steels. Pulse SpotTM welding, which utilizes high current conduction with short periods as a post-weld heating treatment, increased the weld joint strength of high strength steels without extending welding time. The single-side spot welding which controls the electrode force and welding current during welding realized high applicability to closed-sectional structures by the stable nugget formation only with single-side electrode access.
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