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

作　　者：王腾 高向东 Katayama SEIJI 金小莉 

机构地区：[1]Faculty of Electromechanical Engineering,Guangdong University of Technology [2]School of Computer,South China Normal University [3]Joining and Welding Research Institute,Osaka University,11-1 Mihogaoka,Ibaraki,Osaka 567-0047,Japan

出　　处：《Plasma Science and Technology》2012年第3期245-251,共7页等离子体科学和技术（英文版）

基　　金：supported in part by National Natural Science Foundation of China (No.51175095);the Guangdong Provincial Natural Science Foundation of China (10251009001000001, 9151009001000020, 07001764);the Specialized Research Fund for the Doctoral Program of Higher Education of China (20104420110001)

摘　　要：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.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.

关 键 词：plasma feature color image processing disk laser welding 

分 类 号：TG456.7[金属学及工艺—焊接]