Monitoring of Dynamic Mechanical Parameters in Resistance Spot Welding of Aluminium

Dynamic electrode displacement and force were characterized during resistance spot welding of aluminium alloy 5182 sheets using a medium-frequency direct welding current. It was found that rates of increase in electrode displacement and force were both proportional to welding current. Both electrode displacement and force experienced a sudden drop when weld metal expulsion occurred. However, the rate of increase in electrode displacement did …