Method of controlling electrode tip of welding gun in automatic

Details Method of controlling electrode tip of welding gun in automatic Method of controlling electrode tip of welding gun in automatic

1989-01-24

1990-03-27

Miller, Jr., George H.

Electric heating

Metal heating

For bonding with pressure

219 868, B23K 928, B23K 932

Patent

active

049122940

ABSTRACT:
The opening degree of the two arms of a welding gun movable by a robot to a plurality of welding spots, each of the arms being equipped with an electrode tip, is detected when the arms are closed with no work clamped between them and compared with a lower-limit opening degree value. The lower-limit opening degree value is previously set to be equal to the opening degree experienced when the electrode tips are reduced to their lower usability limit. The comparison determines if the tips need to be replaced. After replacement, the opening degree observed with the gun closed with no work clamped between the tips is compared to an upper-limit opening degree value, previously set, to operate an alarm if a defective tip or an incorrectly mounted tip is present.

REFERENCES:
patent: 4531041 (1985-07-01), Larsson
patent: 4789769 (1988-12-01), Warner
patent: 4794221 (1988-12-01), Takabe et al.

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