Method of detecting the state of fusion of the workpiece in weld

Details Method of detecting the state of fusion of the workpiece in weld Method of detecting the state of fusion of the workpiece in weld

1975-03-25

1976-10-26

Truhe, J. V.

Electric heating

Metal heating

By arc

219121EM, B23K 910

Patent

active

039885674

ABSTRACT:
In welding a workpiece from its one side by arc or electron beam welding, a method of detecting the state of fusion of the workpiece which comprises superposing on the arc or electron beam current a signal current selected from the group consisting of positive and negative pulse currents and sinusoidal current to change the heat input applied to the workpiece at the side where the arc or electron beam has been applied, and measuring the waveforms and/or phase differences of the change of said heat input and the corresponding change of temperature at the opposite side of the workpiece, whereby the state of fusion of the workpiece is detected.

REFERENCES:
patent: 3299250 (1967-01-01), Vilkas et al.
patent: 3335254 (1967-08-01), Vilkas et al.
patent: 3496327 (1970-02-01), Vilkas
patent: 3702915 (1972-11-01), Vilkas et al.

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