Weld fill height regulating system for arc welding apparatus

Details Weld fill height regulating system for arc welding apparatus Weld fill height regulating system for arc welding apparatus

1974-12-23

1977-01-25

Truhe, J. V.

Electric heating

Metal heating

By arc

219131F, B23K 912

Patent

active

040053083

ABSTRACT:
Means are provided for maintaining a uniform height of deposited weld material in an electrical arc welding apparatus of the kind having a welding head driven by a travel motor along a juncture between two workpieces which are to be joined. A first signal, indicating departure from a desired fill depth, is produced by sensing variation of the welding current from a predetermined normal magnitude. The first signal is applied to summing junction together with a predetermined selectable reference signal of opposite polarity so that the two signals cancel out as long as the desired weld fill height is being maintained. Upon a departure from the desired weld fill height an output signal from the summing junction activates a servomotor which adjusts the speed of the travel motor as necessary to maintain the uniform weld depth. Means are further provided for assuring continuance of the welding head movement in the event that the melt should be lost because of proximity to an edge of the workpiece or because of an opening therein.

REFERENCES:
patent: 1392437 (1921-10-01), Morton
patent: 3233076 (1966-02-01), Vilkas
patent: 3261960 (1966-07-01), Lehnert
patent: 3264447 (1966-08-01), Agnew
patent: 3267251 (1966-08-01), Anderson
patent: 3373914 (1968-03-01), Wall, Jr.
patent: 3538376 (1970-11-01), Parker
patent: 3612818 (1971-10-01), Bechtle et al.

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