Spot welding control method and apparatus using a servo welding

Details Spot welding control method and apparatus using a servo welding Spot welding control method and apparatus using a servo welding

1994-08-22

1996-12-10

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219109, 901 42, B23K 1125

Patent

active

055827470

ABSTRACT:
A spot welding method and apparatus having electrode tips one of which is driven by a servo motor. In the method and apparatus, it is determined whether or not an abnormal condition occurs. The abnormal condition includes (a) squeezing some obstacle between the electrode tip and a workpiece, (b) a temperature adhesion of the electrode tips with the workpiece, (c) uneven pressurizing of the workpiece by the electrode tips, (d) a weld nugget dispersion, and (e) a too large electric resistance between the electrode tips and the workpiece. When such abnormal condition is detected, some counter measure is taken to prevent or decrease the abnormal condition.

REFERENCES:
patent: 4795882 (1989-01-01), Hardwick et al.
patent: 4841113 (1989-06-01), Hamada et al.
patent: 4984171 (1991-01-01), Tsujii
patent: 5340960 (1994-08-01), Takasaki et al.
Patent Abstracts of Japan vol. 18, No. 23 and JP-A-05 261 560.
Patent Abstracts of Japan vol. 11, No. 15 and JP-A-61 190 604.

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