Penetration feature in an aluminum alloy - workpiece in order to improve the al - steel - point welding,

摘要

A method for spot welding of a workpiece stack, which a workpiece and an adjacent aluminum alloy - workpiece, includes the fact that an electric current through the stack of flat and between aligned welding electrodes in contact with opposite sides of the stack is conducted. The formation of a welded connection between the adjacent steel - and aluminum alloy - workpieces is formed by a in an aluminum alloy - workpiece feature of penetration, which is arranged and which provides a side of the workpiece stack and, and against the at the location of the weld a welding electrode is pressed by means of the penetration depth feature. The penetration depth feature influences the flow pattern and the density of the electric current which flows through the overlapping workpieces, and also on it is assumed that it helps in this case, the effects of any refractory / r to minimize surface oxide, which on the aluminum alloy - workpiece can / can be present, which is adjacent to the workpiece.