Pulsed arc welding apparatus having a consumable electrode wire

Details Pulsed arc welding apparatus having a consumable electrode wire Pulsed arc welding apparatus having a consumable electrode wire

1993-12-28

1995-12-05

Shaw, Clifford C.

Electric heating

Metal heating

By arc

219 74, B23K 909

Patent

active

054731399

ABSTRACT:
A pulsed arc welding apparatus includes a consumable electrode wire which is fed toward a workpiece at a wire feeding rate, a power supply for supplying a welding current to the wire to produce a droplet at the end of the wire by the heat of arc, a pulse form setting part for setting a pulse form of the welding current supplied by the power supply, based on a peak current and a pulse duration, an optimum pulse determining part for determining a peak current and a pulse duration for each of pulses of the welding current based on an average current and for supplying the peak current and the pulse duration to the pulse form setting part so that each respective peak current and each respective pulse duration of the welding current supplied to the wire have a minimum value needed to transfer a droplet from the wire to the workpiece for each pulse at a rate synchronous with the wire feeding rate, and an average current setting part for setting the average current based on the wire feeding rate and for supplying the average current to the optimum pulse determining part.

REFERENCES:
patent: 3781511 (1973-12-01), Rygiol
patent: 3864542 (1975-02-01), Fletcher et al.
patent: 5192851 (1993-03-01), James et al.
"Development of Low frequent Pulsed Arc MIG Welding Method" by H. Yamamoto et al. (vol. 7, pp. 116-117, Oct. 1990, Japan) from the Institute of Welding Engineers of Japan.
"Recent Arc Welding Machines" by T. Mita (pp. 165-171, Aug. 1991, Japan) from the Welding Technology Magazine of Japan.

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