Apparatus for and method of detecting arc length, apparatus for

Details Apparatus for and method of detecting arc length, apparatus for Apparatus for and method of detecting arc length, apparatus for

1989-03-16

1990-07-24

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913001, B23K 9095

Patent

active

049437011

ABSTRACT:
An apparatus for automatically controlling the welding condition or the welding torch position in arc welding which makes use of a welding power source of constant-voltage or constant-current type. The apparatus has an oscillator for superposing a signal of a predetermined frequency to the arc and a detector for detecting the arc sound pressure level corresponding to the frequency of the superposed signal. This apparatus is capable of accurately detecting the arc length or other factors by a simple method without being substantially affected by the noises produced by the arc. Control of the torch position, as well as welding conditions such as welding current, arc voltage and so on, can be precisely performed by making use of the detection of the arc length.

REFERENCES:
patent: 4435631 (1984-03-01), Drouet et al.

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