Real-time Measurement of Weld Pool Oscillation Frequency in GTAW-P Process

doi:10.1016/j.jmapro.2017.08.011

	Real-time Measurement of Weld Pool Oscillation Frequency in GTAW-P Process
	Li, Chunkai 1,2; Shi, Yu 1; Du, Leiming 2; Gu, Yufen 1; Zhu, Ming 1
刊名	JOURNAL OF MANUFACTURING PROCESSES
	2017-10
卷号	29 页码:419-426
关键词	photoelectric conversion GTAW-P Real-time measurement Laser vision
ISSN号	1526-6125
DOI	10.1016/j.jmapro.2017.08.011
英文摘要	Real-time measurement and controlling the degree of weld penetration is a key issue in developing intelligent welding machines. To a certain extent, these welding machines can perform in a manner similar to that of a skilled human welder. The oscillation frequency of weld pool is closely related to weld penetration. However, traditional methods, such as arc voltage and arc light, lack the fundamentals to measure the oscillation frequency accurately. To solve this problem, a real-time sensing system based on photoelectric conversion is proposed for pulsed gas tungsten arc welding process. This sensing system consists of an illumination laser and a photoelectric conversion chamber. The illumination laser with five-line pattern is projected onto the whole possible pool surface and its reflection is captured by the photoelectric conversion chamber. By observing and analyzing the variation of voltage from the photoelectric conversion chamber, we found that the voltage variation is strongly related to the weld pool oscillation. Several experiments with different penetration for stationary and traveling weld pool were conducted, and the oscillation frequency was extracted. Experimental results show that the weld pool oscillation frequency can be measured in real time using this method. In comparison with the image laser-vision method proposed in our previous work, the laser-photoelectric-conversion method has the advantages of high sampling rate, high processing speed, device simplicity, and ability to completely meet the requirement of real-time measurement in actual welding process. The oscillation frequency of partial penetration is considerably higher than the oscillation frequency of full penetration and that an abrupt transition occurs. This abrupt transition in oscillation frequency can be used for monitoring and in-process control of the weld penetration. (C) 2017 Published by Elsevier Ltd on behalf of The Society of Manufacturing Engineers.
资助项目	National Natural Science Foundation of China[51765037] ; Plan for Basic Research Creative Group of Gansu Province[17JR5RA107] ; Hong Liu Outstanding Talent Training Plan of Lanzhou University of Technology of China[J201201]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000413386000038
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33070]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Shi, Yu
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Minist Educ, Key Lab Nonferrous Met Alloys & Proc, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Chunkai,Shi, Yu,Du, Leiming,et al. Real-time Measurement of Weld Pool Oscillation Frequency in GTAW-P Process[J]. JOURNAL OF MANUFACTURING PROCESSES,2017,29:419-426.
APA	Li, Chunkai,Shi, Yu,Du, Leiming,Gu, Yufen,&Zhu, Ming.(2017).Real-time Measurement of Weld Pool Oscillation Frequency in GTAW-P Process.JOURNAL OF MANUFACTURING PROCESSES,29,419-426.
MLA	Li, Chunkai,et al."Real-time Measurement of Weld Pool Oscillation Frequency in GTAW-P Process".JOURNAL OF MANUFACTURING PROCESSES 29(2017):419-426.