Correlation analysis of penetration based on keyhole and plasma plume in laser welding

被引：55
作者：
Zhang, Yi [1 ,2 ]
Li, Fazhi [1 ,2 ]
Liang, Zhichao [1 ,2 ]
Ying, Yeyong [1 ]
Lin, Qida [1 ,2 ]
Wei, Haiying [1 ,2 ]
机构：
[1] Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Key Lab Intelligent Laser Mfg Hunan Prov, Changsha 410082, Hunan, Peoples R China
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2018年 / 256卷
基金：
中国国家自然科学基金;
关键词：
Laser welding; Correlation analysis; Frequency domain; Keyhole area; Plasma plume centroid; BEHAVIOR; DEPTH;
D O I：
10.1016/j.jmatprotec.2018.01.032
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The variation characteristics of the keyhole and the plasma plume are monitored by using high speed camera. The time and frequency domain characteristics of keyhole area (KA) and centroid high plasma plume (CHPP) are analyzed. A covariance mapping technique is applied for the frequency correlation. The KA and the CHPP have different variation in the time domain and similar variation in the frequency domain. The dominate frequency is located in a low-frequency component (0-4000 Hz) under the different penetration modes. The mean spectrum barycenter of partial penetration mode is higher than that of the full penetration mode. There is a high positive correlation in low-frequency component. The frequency of KA between 1500 and 2600 Hz in the partial penetration mode and the frequency below 2000 Hz in the full penetration mode have a high positive correlation with that of the CHPP. The results of the study provided a basis for the on-line inspection of laser welding of tailor rolled material (TRM).
引用
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页码：1 / 12
页数：12
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