Electric heating – Metal heating – By arc
Patent
1995-09-18
1997-10-28
Evans, Geoffrey S.
Electric heating
Metal heating
By arc
21912183, B23K 2600
Patent
active
056814909
ABSTRACT:
A method is provided for monitoring of the progression and the quality of laser material processing. Sensors and detectors are placed in the vicinity of reaction area to capture the signatures of material processing. The signals include light, temperature, sound, gas, smoke, vapor, particles, etc. emanating from the reaction area. The intensity and the timing of certain signals indicate the stages of the processing and the processing quality. One example of this invention is the use of photodiode sensors to monitor the progression of laser spot welding of a certain electronic component. Three photodiode sensors are used to monitor the laser pulse, the reflected beam, and the transmitted beam. A computer analyzes these signals in real time to determine the progressive stages of the laser welding process and the expected weld quality.
REFERENCES:
patent: 5045669 (1991-09-01), Ortiz, Jr. et al.
patent: 5183989 (1993-02-01), Sanders et al.
patent: 5272312 (1993-12-01), Jurca
Beusse James H.
Evans Geoffrey S.
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