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Prediction of weld porosity (pit) in gas metal arc welds
The International Journal of Advanced Manufacturing Technology, 2019Recently, in the automobile industry, the use of zinc-plated high-strength steels has been increasing to lighten vehicles and improve safety. In this scenario, gas metal arc welding (GMAW) processes are applied to automobile bodies and chassis parts. However, porosity defects occur in the welds because of the zinc vapor formed in the zinc coating layer
Seungmin Shin, Min Seok Kim, Sehun Rhee
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On-line control of robotized Gas Metal Arc Welding
CIRP Annals, 2001Abstract On-line control of welding and soldering is a strategic issue for the complete automation of robotized plants. The proposed control system aims to detect the most critical defects in industrial applications. It is based on the analysis of images coming from two cameras installed on the welding torch: the arc and the pool observation allow ...
LANZETTA, MICHELE +2 more
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Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2001
The high-speed rotating arc process forms a flat bead surface and decreased penetration depth. It can be effectively applied to automatic seam tracking, because the sensitivity of this type of arc sensor is greater than that of the conventional torch weaving method.
G-H Kim, S-J Na
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The high-speed rotating arc process forms a flat bead surface and decreased penetration depth. It can be effectively applied to automatic seam tracking, because the sensitivity of this type of arc sensor is greater than that of the conventional torch weaving method.
G-H Kim, S-J Na
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Tandem Gas Metal Arc Welding for Low Distortion Butt Welds
Advanced Materials Research, 2011The feasibility of using Tandem Gas Metal Arc Welding (T-GMAW) to produce full penetration butt welds in 5mm ship panel steel plates has been assessed and compared to the current Submerged Arc Welding (SAW) process. Experiments conducted show that the T-GMAW process is feasible and demonstrated a significant improvement over the SAW process in several ...
Larkin, Nathan P +5 more
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Identifying weld pool dynamics for gas metal arc fillet welds
Science and Technology of Welding and Joining, 1999Arc welding processes are conventionally modelled under static (steady state) conditions to provide a relationship between the controllable process parameter values and the characteristic weld geometry parameters that result. While this is appropriate for open loop control of the process, should closed loop (feedback) control of the process be ...
H.W. Kerr +2 more
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Simulation of rotational arc sensing in gas metal arc welding
Science and Technology of Welding and Joining, 1999A mathematical model for the behaviour and interaction of power source, electrode extension, welding arc, and welding joint geometry is applied to simulation of seam tracking signals from high speed rotating electrodes in gas metal arc welding of carbon steel.
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Effects of Welding Current in Gas Metal Arc Welding [PDF]
9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2006 Tai-Lung Tsai, Junling Hu
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Introduction to Gas Metal Arc Welding Process
2017The operational characteristics of gas metal arc welding (GMAW) process influencing the behavior of weld with respect to its geometry, microstructure and defects has been described. It is presented in reference to the behavior of metal transfer, thermal characteristics of the process and thermal description of the weld.
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Gas metal arc-narrow gap welding
1984Narrow gap welding techniques have been developed to diminish welding work and to meet the requirements of high fracture toughness in heavy plate structures. Welding in narrow grooves has been found sensitive to weld defects. It requires strict procedural tolerances which calls for new thinking in the workshop.
Koivula, Jouko, Gröger, Peter
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