Arc welding

Details Arc welding Arc welding

1977-10-18

1980-02-05

Reynolds, Bruce A.

Electric heating

Metal heating

By arc

73627, 21913771, B23K 910

Patent

active

041874110

ABSTRACT:
Apparatus for use in the control of arc welding, especially the automatic ntrol of consumable electrode arc welding employs a technique of reflecting an ultrasonic pulse from that end of a strip of weld filler material which is melting into the weldpool. The time taken from transmission to return of the ultrasonic pulse is measured to provide a measure of the length of filler material projecting beyond the welding torch, which can then be used eg to facilitate automatic control of the welding process. Apparatus using magnetrostrictive and or magnetoelastic methods of ultrasonic pulse transmission and reception are described. Also apparatus using a piezo-electric method for pulse transmission and reception is described which is especially useful for a non-ferromagnetic weld filler strip.

REFERENCES:
patent: 2656714 (1953-10-01), Cartier
patent: 2721249 (1955-10-01), Landis et al.
patent: 3135858 (1964-06-01), Lesnewich
patent: 3872715 (1975-03-01), Pittaro
patent: 3986389 (1976-10-01), Mesina et al.
patent: 4070917 (1978-01-01), Niklas et al.

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