Resistance welding apparatus with power control for reduced arci

Details Resistance welding apparatus with power control for reduced arci Resistance welding apparatus with power control for reduced arci

1990-08-24

1991-11-12

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 8621, B23K 1124

Patent

active

050649876

ABSTRACT:
A resistance welding apparatus includes a power supply, a pair of welding electrodes and a welding circuit which is operative for controlling the operation of the electrodes to effect a welding operation. The welding circuit is operative for controlling the operation of the electrodes so that a welding operation can only be carried out on a workpiece assembly in the event that the resistance in the circuit path between the electrodes is within a range which is not likely to cause arcing between one or both of the electrodes and the workpiece assembly. The welding circuit further includes a current comparator for controlling the level of the current passed through the electrode during a welding operation.

REFERENCES:
patent: 2077600 (1937-04-01), Watson
patent: 2656446 (1953-10-01), Albarranc
patent: 2675454 (1954-04-01), Warner
patent: 3462577 (1969-08-01), Helms et al.
patent: 3538293 (1970-11-01), Procacino
patent: 4876430 (1989-10-01), Herschitz et al.

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