Seam Tracking Monitoring during High-Power Fiber Laser Welding

Abstract:

Accurate detection of weld seam deviations from the desired path during laser welding process facilitates seam tracking monitoring and is thus of primary concern in performing successful weld. This paper proposes a novel method for real-time seam tracking monitoring during high-power fiber laser welding, as it investigates into the techniques of infrared image sensing and visual recognition. Molten pool images were taken by a high-speed camera arranged in the off-axis direction of laser beam. Accumulative grayscale variation based on a molten pool thermal distribution was extracted and used to determine the deviations between the laser beam focus and the weld seam center. The proposed algorithm was experimented on a butt joint laser welding of Type 304 stainless steel plates at a continuous wave fiber laser power of 10 kW.

• Periodical: Applied Mechanics and Materials (Volumes 201-202)
• Pages: 69-72
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.201-202.69
• Online since: October 2012
• Authors: Xiang Dong Gao, De Yong You
• Keywords: Fiber Laser Welding, Infrared Image, Monitoring, Seam Tracking

References

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