Study of Dynamic Features of Surface Plasma in High-Power Disk Laser Welding

WANG Teng (王腾); GAO Xiangdong (高向东); Katayama SEIJI; JIN Xiaoli (金小莉)

doi:10.1088/1009-0630/14/3/11

Plasma Science and Technology > 2012 > 14(3): 245-251. > DOI: 10.1088/1009-0630/14/3/11

WANG Teng (王腾), GAO Xiangdong (高向东), Katayama SEIJI, JIN Xiaoli (金小莉). Study of Dynamic Features of Surface Plasma in High-Power Disk Laser Welding[J]. Plasma Science and Technology, 2012, 14(3): 245-251. DOI: 10.1088/1009-0630/14/3/11

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Study of Dynamic Features of Surface Plasma in High-Power Disk Laser Welding

1, Faculty of Electromechanical Engineering, Guangdong University of Technology, 510006 Guangzhou, China.2, School of Computer, South China Normal University, 510631 Guangzhou, China.3,Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan

Funds: supported in part by the Guangdong Provincial Natural Science Foundation of China (10251009001000001, 9151009001000020, 07001764) and the Specialized Research Fund for the Doctoral Program of Higher Education (20104420110001).

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Received Date: November 24, 2010

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Abstract

Abstract

High-speed photography was used to obtain the dynamic changes in the surface plasma during a high-power disk laser welding process. A color space clustering algorithm to extract the edge information of the surface plasma region was developed in order to improve the accuracy of image processing. With a comparative analysis of the plasma features, i.e., area and height, and the characteristics of the welded seam, the relationship between the surface plasma and the stability of the laser welding process was characterized, which provides a basic understanding for the real-time monitoring of laser welding.
- plasma feature,
- color image processing,
- disk laser welding

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