应用激光, 2017, 37 (6): 847, 网络出版: 2018-01-10   

激光深熔焊接过程中等离子体的检测与分析

Detection and Analysis of Plasma during Laser Deep Penetration Welding
作者单位
1 无锡市计量测试院 江苏 无锡 214101
2 北京工业大学激光工程研究院 北京 100124
摘要
采用高速摄像仪和多通道光谱仪对CO2激光深熔焊接过程中的光致等离子体进行了实时观测和分析, 在局域热力学平衡(LTE)条件下, 利用多谱线斜线法计算了等离子体的温度, 并定量的研究了稳定的激光深熔焊接过程中等离子体的时间特性, 并分析了等离子体的振荡特性与焊接稳定性的关系及其对焊缝成形的影响。研究表明, 在稳定的激光深熔焊接过程中, 光致等离子体成一定频率振荡, 上下起伏的振荡频率和尺寸大小波动的频率大致相符, 其频率基本和焊缝表面鱼鳞纹条纹的生成频率一致。而在激光深熔焊接过程的不稳定阶段, 对应的焊缝表面鱼鳞纹的生成频率和等离子体的振荡频率差异很大。
Abstract
The laser induced plasma during CO2 laser deep penetration welding have been studied through the real-time observation and analysis with high-speed camera and multichannel spectrometer. Under the condition of local thermodynamic equilibrium(LTE), the temperature of the plasma have been calculated using the method of multispectral diagonal lines, and then the plasma time characteristic have been quantitative studied in the stable deep penetration laser welding process. Furthermore, the relationship between plasma oscillation characteristics and welding stability and its influence on the weld formation have been researched. The results show that plasma oscillates with a certain frequency in a stable welding process. Meanwhile, the up and down frequency of plasma is consistent with its size fluctuation approximately, and the frequency of plasma is also basically in agreement with the surface stripe change of weld. In the unsteady laser deep penetration welding process, the frequency of formation of stripe and the oscillation frequency of the plasma on the surface of the corresponding weld are very different.

张盛海, 杨武雄. 激光深熔焊接过程中等离子体的检测与分析[J]. 应用激光, 2017, 37(6): 847. Zhang Shenghai, Yang Wuxiong. Detection and Analysis of Plasma during Laser Deep Penetration Welding[J]. APPLIED LASER, 2017, 37(6): 847.

本文已被 1 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!