中国激光, 2016, 43 (12): 1202005, 网络出版: 2016-12-09
不同焊接模式下的A304不锈钢YAG激光焊等离子体的电信号特征
Electrical Signal Characteristics of Plasma in YAG Laser Welding of A304 Stainless Steels Under Different Modes
激光技术 激光焊接 激光等离子体 电信号 焊接模式 laser technique laser welding laser induced plasma electrical signal welding mode
摘要
提出一种无源电检测装置,对A304不锈钢YAG激光焊接过程中的等离子体电信号进行检测,并利用高速摄像机对等离子体的形态进行观察。结果表明,不同焊接模式下的等离子体电信号具有不同的时域特征。对不同焊接模式下的等离子体电信号特征进行理论与试验分析,发现等离子体电信号受等离子体效应和鞘层效应的共同影响;小孔的形成与否是造成不同焊接模式下等离子体电信号特征不同的决定性因素。
Abstract
A novel passively electrical device is proposed to detect the electrical signals of plasma in YAG laser welding of A304 stainless steels and a high-speed camera is used to observe the plasma shapes. The results indicate that the time-domain characteristics of signals are different in different welding modes. The theoretical and experimental analyses of the signal characteristics under different welding modes indicate that the plasma electrical signal is influenced by the combination of the plasma effect and sheath effect; the determinant factor resulting in different electrical signal characteristics under different welding modes is whether the keyholes are formed or not.
赵圣斌, 杨立军, 刘桐, 杨瑞霞, 潘家敬, 邱文聪. 不同焊接模式下的A304不锈钢YAG激光焊等离子体的电信号特征[J]. 中国激光, 2016, 43(12): 1202005. Zhao Shengbin, Yang Lijun, Liu Tong, Yang Ruixia, Pan Jiajing, Qiu Wencong. Electrical Signal Characteristics of Plasma in YAG Laser Welding of A304 Stainless Steels Under Different Modes[J]. Chinese Journal of Lasers, 2016, 43(12): 1202005.