Nondestructive real-time method for monitoring the quality of a

Details Nondestructive real-time method for monitoring the quality of a Nondestructive real-time method for monitoring the quality of a

1982-01-19

1983-12-06

Shaw, C. C.

Electric heating

Metal heating

By arc

219121LB, 228104, B23K 910

Patent

active

044195621

ABSTRACT:
Herein disclosed is a noncontact, nondestructive method for monitoring the quality of a high energy weld, e.g., laser beam weld. In accordance with the proposed method, an acoustic sensor (32) is positioned at a distance from the welding zone (34) and picks up airborne acoustic emission signals (33) associated with the laser welding process. These acoustic signals, propagating through the air space between the welding zone (34) and the sensor (32), are detected and analyzed (36,37) to determine the quality of the weld (FIG. 3).

REFERENCES:
patent: 3648009 (1972-03-01), Steigerwald
patent: 3679865 (1972-07-01), Jenitzer et al.
patent: 3824377 (1974-07-01), Notvest
patent: 3986391 (1976-10-01), Vahaviolos
patent: 4007631 (1977-02-01), Saifi et al.
patent: 4144766 (1979-03-01), Wehrmeister
R. E. Herzog, "Forecasting Failures with Acoustic Emission", Machine Design, vol. 45, 6/14/73, pp. 132-137.
G. T. Mallick, Jr., "Acoustic Die Monitoring", S.M.E. Technical Paper TE77-502, 1977, pp. 1-15.

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