Patent ID: 6621036
Filing Date: 2003-09-16
Classification: B23K

Abstract:
Apparatus for automatic spot welding of metal sheets, the apparatus comprising:a support for holding a pair of metal sheets in a temporary assembly with opposing surfaces in contact for spot welding at selected locations; first and second electrodes selectively engagable with opposite sides of the assembly at the selected locations for conducting spot welding current to weld the sheets together at said locations; a first positioner programmable to move the first electrode to sequentially engage each of the selected locations on one side of the assembly; and a second positioner programmable to move the second electrode to simultaneously engage each of the selected locations on an opposite side of the assembly for spot welding of the assembly at said locations; wherein at least one of the electrodes includes a plurality of electrical contact heads angled in diverse directions adapted to facilitate contact of said one electrode with the assembly at the selected locations.