Numerical and experimental investigations of weld pool geometry in GTA welding of pure aluminum

2014 ◽  
Vol 21 (1) ◽  
pp. 20-26 ◽  
Author(s):  
A. H. Faraji ◽  
A. Bahmani ◽  
M. Goodarzi ◽  
S. H. Seyedein ◽  
M. O. Shabani
Keyword(s):  
Weld Pool ◽  
Pure Aluminum ◽  
Gta Welding ◽  
Experimental Investigations ◽  
Weld Pool Geometry

Experimental study and numerical modeling of arc and weld pool in stationary GTA welding of pure aluminum

2014 ◽  
Vol 71 (9-12) ◽  
pp. 2059-2071 ◽  
Author(s):  
Amir Hossein Faraji ◽  
Massoud Goodarzi ◽  
Seyed Hossein Seyedein ◽  
Mohammad Hasan Zamani
Keyword(s):  
Experimental Study ◽  
Numerical Modeling ◽  
Weld Pool ◽  
Pure Aluminum ◽  
Gta Welding

Sensing and Control of Weld Pool Geometry for Automated GTA Welding

1995 ◽  
Vol 117 (2) ◽  
pp. 210-222 ◽  
Author(s):  
R. Kovacevic ◽  
Y. M. Zhang ◽  
S. Ruan
Keyword(s):  
Real Time ◽  
Weld Pool ◽  
Gta Welding ◽  
Image Features ◽  
Nitrogen Laser ◽  
Pool Surface ◽  
Weld Pool Geometry ◽  
Difficult Procedure ◽  
Robust Adaptive ◽  
And Control

Weld pool geometry is a crucial factor in determining welding quality, especially in the case of sheet welding. Its feedback control should be a fundamental requirement for automated welding. However, the real-time precise measurement of pool geometry is a difficult procedure. It has been shown that vision sensing is a promising approach for monitoring the weld pool geometry. Quality images that can be processed in real-time to detect the pool geometry are acquired by using a high shutter speed camera assisted with nitrogen laser as an illumination source. However, during practical welding, impurities or oxides existing on the pool surface complicate image processing. The image features are analyzed and utilized for effectively processing the image. It is shown that the proposed algorithm can always detect the pool boundary with sufficient accuracy in less than 100 ms. Based on this measuring technique, a robust adaptive system has been developed to control the pool area. Experiments show that the proposed control system can overcome the influence caused by various disturbances.

The oscillation of stationary weld pool surface in the GTA welding

2018 ◽  
Vol 256 ◽  
pp. 57-68 ◽  
Author(s):  
J.K. Huang ◽  
M.H. Yang ◽  
J.S. Chen ◽  
F.Q. Yang ◽  
Y.M. Zhang ◽  
...  
Keyword(s):  
Weld Pool ◽  
Gta Welding ◽  
Pool Surface ◽  
Weld Pool Surface
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