Patent ID: 6624378
Filing Date: 2003-09-23
Classification: B23K

Abstract:
Spot welding gun for resistance welding of objects (39), comprising: a C-shaped arm (9), a first electrode (11), a back electrode (13) and a fluid driven cylinder (21), the back electrode being axially moveable a limited distance by the cylinder, the spot welding gun being arranged to clamp the objects between tips (15, 17) of the electrodes by actuating the cylinder and to provide a welding current flow between said electrode tips, wherein the back electrode is arranged to be releasable from, axially movable in relation to, and fastenable to the cylinder in another axial position to enable or simplify positioning the spot welding gun so that the electrodes are at opposite sides of the objects, removal of the spot welding gun from the welded objects and adjustment of an electrode spacing distance (a) in relation to the thickness (t) of the objects.