Electric heating – Metal heating – By arc
Patent
1996-02-29
1998-03-17
Walberg, Teresa J.
Electric heating
Metal heating
By arc
21912183, B23K 2602
Patent
active
057289921
ABSTRACT:
Welds made by pulses of laser energy are evaluated on-line by analyzing light emitted from the weld site during application the laser pulses. The pulses of light from the weld site are compared with base pulses generated from a good weld, and are used to calculate parameters such as heat-up rate and peak temperature which in turn, are analyzed to determine weld quality. For use in welding in confined spaces such as heat exchange tubes, and particularly the tubes in a PWR steam generator, a single optic fiber delivers the laser energy pulses to the weld site and transmits light from the weld site back to a splitter which diverts it to detectors for conversion to electrical signals used to generate a graphical display.
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Mills Gregory L.
Walberg Teresa J.
Westinghouse Electric Corporation
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