Method for controlling a penetration bead

Details Method for controlling a penetration bead Method for controlling a penetration bead

1988-06-27

1989-10-24

Shaw, Clifford C.

Electric heating

Metal heating

By arc

2191241, B23K 912

Patent

active

048764329

ABSTRACT:
A method for controlling a penetration bead, in an automatic one-side gas shielded arc welding wherein the backing material is adhered to the back of work pieces along a weld line and the welding is effected automatically from the surface side of the work pieces, comprises: putting an electrically conductive material on the surface of the backing material in the longitudinal direction; detecting a voltage between the work pieces and the electrically conductive material during the welding and controlling the voltage to be a predetermined reference voltage. The voltage is controlled by comparing the reference voltage and the detected voltage to obtain their difference and by correcting a speed of a travelling carriage which corresponds to the difference voltage to let the detected voltage be equal to the reference voltage. The electrically conductive material is one selected from a metallic foil tape, a metallic net and a wire.

REFERENCES:
patent: 3264447 (1966-08-01), Agnew
patent: 4005308 (1977-01-01), Chaney et al.
patent: 4210264 (1980-07-01), Kondo

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