On-Line Plasma Diagnostics For Process-Control In Welding With CO[sub]2[/sub] Lasers

W. Gatzweiler; D. Maischner; E. Beyer

doi:10.1117/12.950058

24 March 1989 On-Line Plasma Diagnostics For Process-Control In Welding With CO₂ Lasers

W. Gatzweiler, D. Maischner, E. Beyer

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.

Citation Download Citation

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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