Patent ID: 7518083
Filing Date: 2009-04-14
Classification: B23K

Abstract:
1. A spot-welding tool for resistance-welding of workpieces, comprising: two welding tongs; at least two electrodes, each electrode having a cap and being disposed on a respective one of the welding tongs; a winding mechanism for winding and unwinding a strip for protection of at least one of said at least two electrodes; a pressure element arranged on each electrode in a region of the electrode cap, said pressure element including a guide for the strip and being connected with the electrode in a manner movable in a longitudinal direction thereof so as to place the strip in a spaced-apart relationship to the electrode, wherein said pressure element exerts additional pressure on the workpieces when said welding tongs are closed, wherein said pressure element projects beyond the electrode when the welding tongs are in an open position and is automatically displaced relative to the respective electrode and toward the workpieces as the welding tongs are opened, said guide guiding the strip so as to lie parallel to a longitudinal axis of the electrode and said pressure element automatically lifting the strip off of the electrode as the strip is guided during or after the opening of the welding tongs; and a supporting element arranged on each electrode, said supporting element including guide channels for receiving the strip.