Welding machine

Details Welding machine Welding machine

2006-04-11

2006-04-11

Shaw, Clifford C. (Department: 1725)

Electric heating

Metal heating

Nonatmospheric environment at hot spot

C228S219000

Reexamination Certificate

active

07026569

ABSTRACT:
The inventive system and method allows the control of shielding gas in an electric welding apparatus having automatic wire feed by controlling the flow rate of the shielding gas as a function of the wire feeding speed and/or the welding current obtained. A control circuit112receives an input signal203that is representative for the wire feeding speed and/or the welding current, and issues, in response to the input signal203, a control signal206to a controllable flow control valve110in a gas supply line201, 202, 208, which passes shielding gas from a tank101, via a regulator valve102, to a discharge nozzle of the welding apparatus welding gun. An adjusting unit113provides an operator with an interface which permits adjustment of the parameters that determine the flow rate function.

REFERENCES:
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patent: 5221825 (1993-06-01), Siewert et al.
patent: 5304776 (1994-04-01), Buerkel et al.
patent: 5609782 (1997-03-01), Kim
patent: 6248975 (2001-06-01), Lanouette et al.
patent: 3544280 (1987-06-01), None
patent: 3827383 (1990-02-01), None
patent: 0463489 (1992-01-01), None
patent: 2049315 (1980-12-01), None

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