On-line monitor of hydrogen porosity based on arc spectral information in Al–Mg alloy pulsed gas tungsten arc welding
On-line monitor of hydrogen porosity based on arc spectral information in Al–Mg alloy pulsed gas tungsten arc welding
复制标题
DOI：
10.1016/j.optlastec.2015.01.010
复制
发表时间：
2015-07
影响因子：
5
通讯作者：
Huanwei Yu;Yanling Xu;J. Song;Jianzhong Pu;Xing-min Zhao;Guoping Yao
中科院分区：
文献类型：
--
作者：
Huanwei Yu;Yanling Xu;J. Song;Jianzhong Pu;Xing-min Zhao;Guoping Yao
提出了一种基于电弧光谱信息的铝镁合金脉冲钨极氩弧焊氢气孔在线监测方法。为此目的，分析电弧气氛中的氢和氩成分的光谱线时，孔隙发生，并在这些线所涉及的连续光谱的干扰被消除。提取了656.28nm的H I线与641.63nm的Ar I线强度比的峰值分量作为特征信号，以避免脉冲干扰和非氢干扰。通过对不同焊接条件下提取的特征信号进行统计分析，建立了焊缝气孔检测的预测模型，并成功地识别了天然气孔的最可能位置和人工气孔的准确位置。
An on-line approach based on arc spectral information was proposed to monitor the hydrogen porosity in Al–Mg alloy pulsed gas tungsten arc welding. For this purpose, spectral lines of the hydrogen and argon components of the arc atmosphere were analyzed when porosities occurred, and that interference of the continuous spectra involved in these lines was eliminated. The peak component of the intensity ratio of the H I line at 656.28 nm to the Ar I line at 641.63 nm was extracted as the characteristic signal to avoid the pulse interference and the non-hydrogen disturbances. Based on the statistical analysis of the extracted characteristic signal under different welding conditions, a predicting model for weld porosity detection was established and successfully used to identify the most probable position of the native porosity as well as the exact position of the artificial porosity.