Analysis of Characteristic of Metal Vapor Plume during High-Power Disc Laser Welding

Abstract:

Metal vapor plume which induced during high power disc laser welding contains lots of information that related to the welding quality. Stainless steel 304 was taken as the experiment object for the high power disc laser welding experiment. A high-speed camera was used to capture the ultraviolet band and visible light band metal vapor plume images in the laser welding process. Image processing techniques such as median filtering, Wiener filtering, gray level threshold and image binarization were applied to get the images that only metal vapor plume was included. The ratio of the absolute value of coordinate difference between the centroid of plume and welding point was taken as the characteristic parameter. Welding experimental results and analysis of the changing of the ratio of the absolute value of coordinate difference between the centroid of plume and welding point confirmed that the welding quality could be monitored by the metal vapor plume during high power disc laser welding.

• Periodical: Applied Mechanics and Materials (Volumes 201-202)
• Pages: 1126-1129
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.201-202.1126
• Online since: October 2012
• Authors: Qian Wen, Xiang Dong Gao
• Keywords: High Power Disk Laser Welding, Metal Vapor Plume, Welding Quality

References

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