Apparatus for automatically replacing welding electrodes

Details Apparatus for automatically replacing welding electrodes Apparatus for automatically replacing welding electrodes

1995-04-21

1998-03-31

Walberg, Teresa J.

Electric heating

Metal heating

For bonding with pressure

219 868, 279106, B23K 1131, B23K 1136

Patent

active

057341419

ABSTRACT:
A double extractor and an electrode supply station are provided for automatically replacing electrodes in opposing jaws of a resistance welding machine. With coated sheet steels now used for car body structures, it is found that electrodes must be replaced more often. The automatic replacement system is programmed to replace electrodes when the welding machine is idle such as between the movement of car bodies or other structures moving on a conveyor. A double extractor has a first position for extracting top electrodes and a second position for extracting bottom electrodes. Both positions have a plurality of gripping fingers operated by a cam, which simultaneously twist and pull-off the electrodes from the jaw. After the jaw has been removed, the gripping fingers release the old electrode.

REFERENCES:
patent: 3016245 (1962-01-01), Zelewsky
patent: 4794221 (1988-12-01), Takabe et al.
patent: 4935595 (1990-06-01), Fuse
patent: 5073692 (1991-12-01), Jackson et al.
patent: 5387774 (1995-02-01), Boyer et al.
patent: 5495663 (1996-03-01), Saito

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