METHOD OF WELDING PLATED STEEL SHEET AND RAW STEEL SHEET AND METHOD OF WELDING VEHICLE DOOR SASH
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United States of America Patent
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app pub date -
Mar 26, 2014
filing date -
Mar 29, 2013
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Abstract
A method of spot-welding portions of a plated steel sheet and a raw steel sheet which are overlaid on each other, the spot-welding method includes preparing a flat electrode and a radius electrode serving as a pair of welding electrodes, bringing the flat electrode and the radius electrode into contact with the portions of the plated steel sheet and the raw steel sheet, respectively, with the portions of the plated steel sheet and the raw steel sheet overlaid on each other, and performing a spot-welding process by passing a welding current through the flat electrode and the radius electrode to spot-weld the portions of the plated steel sheet and the raw steel sheet to each other while applying pressure on the portions of the plated steel sheet and the raw steel sheet by the flat electrode and the radius electrode.
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