中国激光, 2014, 41 (5): 0503004, 网络出版: 2014-04-22
高功率光纤激光-TIG复合焊接实验研究 下载: 561次
Experimental Research on High Power Fiber Laser-TIG Hybrid Welding
激光技术 光纤激光 羽辉 非熔化极气体保护焊电弧 复合焊接 laser technique fiber laser plume tungsten inert gas arc hybrid welding
摘要
激光诱导的羽辉对高功率光纤激光焊接过程具有重大影响。采用IPG YLS-6000光纤激光器和Fronius MagicWave3000job数字化焊机进行了高功率光纤激光-非熔化极气体保护焊(TIG)复合焊接实验;通过高速摄像记录焊接过程中羽辉和等离子体的形态,并利用体视显微镜观测焊缝的熔深和熔宽。研究了TIG电弧对高功率光纤激光焊接羽辉影响的基本规律,并分析了产生这种影响的主要机制。结果表明,高功率光纤激光-TIG复合焊接熔深比单光纤激光焊接显著提高约20%,且基本不受电流大小的影响,焊接熔宽随电弧电流的增加逐渐增大;在一定热源间距范围,复合焊接熔深和熔宽对其变化不敏感。电弧对羽辉的作用机制主要表现为高温的电弧能够气化羽辉中的微粒,从而显著削弱羽辉对激光的影响。
Abstract
Laser-induced plume affects the process of high-power fiber laser welding. The effect of Tungsten Inert gas (TIG) arc on the plume characteristics and the welding results are investigated. An IPG YLS-6000 fiber laser and a Fronius MagicWave3000job digital welding machine are used in the experiment. The profile of the plume and the arc plasma are recorded by a high-speed camera. Furthermore, the weld depth and weld width are measured by a microscope. The fundamental law of TIG arc on plume induced in high power fiber laser welding is studied, and the main mechanism of this effect is analyzed. The results show that, the weld depth of hybrid welding significantly increases by about 20% compared with pure fiber laser welding, and almost isn′t affected by arc current. The weld width gradually improves as arc current increases. The weld depth and weld width are insensitive to the distance between laser and arc within limits. The main effect of TIG arc on plume is the gasification of the particles in plume by high temperature TIG, so the influence of plume on laser beam significantly weakened.
李飞, 邹江林, 孔晓芳, 吴世凯, 肖荣诗. 高功率光纤激光-TIG复合焊接实验研究[J]. 中国激光, 2014, 41(5): 0503004. Li Fei, Zou Jianglin, Kong Xiaofang, Wu Shikai, Xiao Rongshi. Experimental Research on High Power Fiber Laser-TIG Hybrid Welding[J]. Chinese Journal of Lasers, 2014, 41(5): 0503004.