Consumable electrode type d.c. arc welder

Details Consumable electrode type d.c. arc welder Consumable electrode type d.c. arc welder

1992-12-16

1993-12-21

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913021, B23K 910

Patent

active

052723143

ABSTRACT:
A consumable electrode type d.c. arc welder including an invertor, which is arranged to rectify an a.c. power from a power supply, once convert a resultant d.c. power into a high frequency a.c. power by the invertor and again rectify it to obtain a d.c. power for welding, and provided with means for detecting a current flowing through its welding load to certainly discriminate shortening and arcing states between a welded base material and a welding electrode rod and controlling the invertor with a resultant discrimination signal to reduce its output voltage during the shortening period, thereby preventing spattering produced by an over-current.

REFERENCES:
patent: 3792225 (1974-02-01), Needham et al.
patent: 4476376 (1984-10-01), Mizuno et al.
patent: 4521672 (1985-06-01), Fronius
patent: 4665299 (1987-05-01), Iwata

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