Electric heating – Metal heating – By arc
Patent
1983-12-12
1986-01-28
Albritton, C. L.
Electric heating
Metal heating
By arc
219121PC, 219121PY, 156626, B23K 900
Patent
active
045673454
ABSTRACT:
A process for the in-line inspection of the depth of a weld carried out by a welding beam pulse in which around its impact point on a workpiece, the beam pulse produces a welding plasma wherein, only during the emission of a welding beam pulse, at least one selected monochromatic emission line of the welding plasma is optically collected from the workpiece. The energy of said lines is converted into analog electrical signals and those signals are digitally processed with the resulting signals being compared with reference signals to produce an indication of the weld depth. Apparatus for performing this process is also disclosed.
REFERENCES:
patent: 3271558 (1966-09-01), Davis
patent: 3974381 (1976-08-01), Rohrle et al.
patent: 4127762 (1978-11-01), Paton et al.
Apr. 1981--Laser Focus, vol. 17, No. 4, pp. 30-34, entitled "Laser Assesses Weld Composition to Evaluate Condition of Reactors", (Author unknown).
Mar. 1976--Laser Focus, vol. 12, No. 3, pp. 33-36, entitled "Automated Welding of Minute Parts", by J. Aeschlimann et al.
Feb. 1982--IBM Technical Disclosure Bulletin, vol. 24, No. 9, pp. 4691-4692, entitled "Closed-Loop Laser Control System", by H. E. Klauser.
Bachet Bernard
Daguet Jean
Dujardin Louis
Albritton C. L.
Commissariat a l''Energie Atomique
Lateef M. N.
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