RESEARCH ON THE CORRELATION BETWEEN THE STATUS OF THREE-DIMENSIONAL WELD POOL SURFACE AND WELD PENETRATION IN TIG WELDING

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	RESEARCH ON THE CORRELATION BETWEEN THE STATUS OF THREE-DIMENSIONAL WELD POOL SURFACE AND WELD PENETRATION IN TIG WELDING
	Zhang Gang; Shi Yu; Li Chunkai; Huang Jiankang; Fan Ding
刊名	ACTA METALLURGICA SINICA
	2014-08-11
卷号	50 期号:8 页码:995-1002
关键词	TIG welding laser vision weld pool free surface weld joint penetration control
ISSN号	0412-1961
英文摘要	Measurement of the weld pool surface is a difficult but urgent task in the welding community. It plays an important role in developing the next generation intelligent welding machines, in particular, controlling the weld joint penetration in automatic welding. In this work, the images of front-side free surface and back-side width of the weld pool are synchronously captured with two CCD cameras in tungsten inert gas (TIG) are welding process based on laser vision, and the three dimensional weld pool surface is reconstructed using designed algorithm. Then, the correlation between the weld pool surface under different weld joint penetration and its back-side width is analyzed qualitatively. The variation of reflected laser dots shape is reversely simulated under different depths of weld pool surface, which represents the different weld joint penetration, after established the standard model of weld pool, incident, reflected ray and imaging plan's mathematical model. It is found that the change of weld pool surface obtained by this method has an intimate immanent correlation with the weld joint penetration. When the weld joint penetration changes from partial penetration to complete joint penetration, the weld pool surface's shape changes from convexity to concave, and its depth is increasing with the increased back-side width. The row curvature of reflected laser dots is diminishing. When the penetration achieves excessive penetration, the depth of the weld pool surface is more rapidly increased, and the row curvature is also increased. The gathered laser dots is drawn back again at parallel direction. The simulated results associate with the measurement very well. The variations of reflected laser dots shape can represent the degree of weld joint penetration. This research lays a good foundation for the control of weld joint penetration using the characteristics of weld pool surface.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000340866800013
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155512]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Zhang Gang,Shi Yu,Li Chunkai,et al. RESEARCH ON THE CORRELATION BETWEEN THE STATUS OF THREE-DIMENSIONAL WELD POOL SURFACE AND WELD PENETRATION IN TIG WELDING[J]. ACTA METALLURGICA SINICA,2014,50(8):995-1002.
APA	Zhang Gang,Shi Yu,Li Chunkai,Huang Jiankang,&Fan Ding.(2014).RESEARCH ON THE CORRELATION BETWEEN THE STATUS OF THREE-DIMENSIONAL WELD POOL SURFACE AND WELD PENETRATION IN TIG WELDING.ACTA METALLURGICA SINICA,50(8),995-1002.
MLA	Zhang Gang,et al."RESEARCH ON THE CORRELATION BETWEEN THE STATUS OF THREE-DIMENSIONAL WELD POOL SURFACE AND WELD PENETRATION IN TIG WELDING".ACTA METALLURGICA SINICA 50.8(2014):995-1002.