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24 March 1989 On-Line Plasma Diagnostics For Process-Control In Welding With CO2 Lasers
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Proceedings Volume 1020, High Power CO2 Laser Systems and Applications; (1989) https://doi.org/10.1117/12.950058
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany
Abstract
During laser beam welding, a laser induced metal vapour plasma is formed. The plasma shows strong fluctuations combined with sound emission. The origin of these fluctuations is discussed. On-line control of the welding process is possible by measuring and analyzing the plasma emission with a photodiode and the sound emission with a microphone. Optical diagnostic methods are compared with acoustical methods. The results show that both diagnostic methods yield complementary information on the process. On-line control of the welding process is demonstrated for the influence of the process gas, hole formation in the seam and welding through.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
W. Gatzweiler, D. Maischner, and E. Beyer "On-Line Plasma Diagnostics For Process-Control In Welding With CO2 Lasers", Proc. SPIE 1020, High Power CO2 Laser Systems and Applications, (24 March 1989); https://doi.org/10.1117/12.950058
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