Matching electrodes for resistance spot welding to steel workpieces of aluminium workpieces

摘要

A spot weld can be between a aluminum workpiece and an adjacent overlapping workpiece with the use of opposite spot-welding electrodes be formed, which have matching sweat sides for engagement with the outer surfaces of the workpiece are designed stack assembly. The electrode, which in the stacked arrangement engages in the vicinity of the aluminum workpiece, has a central upwardly convex surface, and the electrode, which in the stacked arrangement engages in the vicinity of the workpiece, has an annular surface. The mating sweat sides of the first and second spot-welding electrodes distributing the electric current flowing along a radially outwardly expanding flux path there, in order to achieve a more uniform temperature distribution over the intended point welding to provide a limit surface, and can also be in a deformed connection interface inside of the formed weld produce. Each of these events, the strength of the welding location would be advantageously influenced.