RESISTANCE SPOT WELDING METHOD FOR A LAP-JOINT OF MULTI-METAL SHEETS

摘要

A resistance spot welding method for a lap joint multi-metal sheets which may improve the welding efficiency and nugget quality comprises: coating a joining zone of one of two mutually facing surfaces of two adjacent metal sheets with an active agent with high resistivity to form a welding region, and clamping the welding region with an upper welding electrode and a lower welding electrode and providing an electric current into the welding region. The active agent with high resistivity generates high heat energy to melt the joining zone and join the two adjacent metal sheets. The active agent with high resistivity has a resistivity much greater than a resistivity of each of the two metal sheets, and the active agent with high resistivity consists of multi-component powders and an organic solvent.