Method and device for controlling the length of an electrical ar

Details Method and device for controlling the length of an electrical ar Method and device for controlling the length of an electrical ar

1981-12-15

1984-03-06

Shaw, C. C.

Electric heating

Metal heating

By arc

219137R, 373105, B23K 910

Patent

active

044356315

ABSTRACT:
In accordance with the method, the arc supplying current is modulated if necessary for generating an acoustical signal. The acoustical signal generated by the arc is detected and its amplitude which, in practice, is a direct function of the actual length of the arc, is compared to a reference amplitude corresponding to the desired length of the electrical arc, in order to determine the algebraic value of their difference. This algebraic value is used for monitoring at least one element of the machine between which the arc forms, and moving this element proportionally to the so-determined algebraic value in order to increase or reduce the actual length of the arc and to bring this length back to the desired length.

REFERENCES:
patent: 3679865 (1972-07-01), Jesnitzer et al.
patent: 3989921 (1976-11-01), Ohi et al.

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