| 摘要 |
The present invention relates to a method for resistance welding of objects (39) by a spot welding gun och the spot welding gun itself, which gun comprises a C-formed arm (9), a front electrode (11) and a back electrode (13) and a cylinder (21), which is driven pneumatically or in another way. The back electrode (13) is axially impellable a limited distance by the cylinder (21). The spot welding gun is arranged to clamp the objects (39) between the electrode tips (15, 17) by impelling the cylinder (21) and providing a welding current to flow between said electrode tips (15, 17). According to the invention the back electrode (13) is arranged to be released from, moved axially in relation to, and fastened to the cylinder (21) to enable or simplify positioning of the spot welding gun so that the electrodes (11, 13) are on each side of the objects (39), removal of the spot welding gun from the welded objects and adjustment of the electrode distance (a) after the thickness (t) of the objects.
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