Touchwork system for a MIG arc welding apparatus

Details Touchwork system for a MIG arc welding apparatus Touchwork system for a MIG arc welding apparatus

1976-03-30

1978-03-14

Truhe, J. V.

Electric heating

Metal heating

By arc

219136, 21913771, B23K 910

Patent

active

040792315

ABSTRACT:
A touchwork system for use in conjunction with a MIG arc welding apparatus comprising a sensing circuit operating at very low output voltages, e.g. 6-8 volts, which senses the touch of the consumable wire electrode to the workpiece when the welding process is started. A control circuit energizes the welding contactor in response to a signal from the sensing circuit and turns on the power supply. At the same time, the control circuit starts the wire feeder motor and also the flow of shielding gas to the torch. A detector circuit detects the flow of welding current and feeds a signal to the control circuit to keep the welding contactor energized and the power supply in circuit and also to maintain operation of the wire feeder motor and the flow of shielding gas to the torch.

REFERENCES:
patent: 3024353 (1962-03-01), Brashear, Sr.
patent: 3603846 (1971-09-01), Toth
patent: 3627977 (1971-12-01), Aldenhoff
patent: 3886369 (1975-05-01), Porter

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