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Microprocessor control of arc starting for gas tungsten arc welding (GTAW)
IEEE Proceedings on Southeastcon, 2002The development of a microprocessor-based controller which uses an adaptive touch-starting algorithm to ignite an arc on a gas tungsten arc welding system (GTAW) is described. By controlling the torch position and the welding current the arc is started without any use of high voltage.
J.B. Bjorgvinsson +3 more
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Adaptive modeling of the weld pool geometry in gas tungsten arc welding
2013 10th IEEE INTERNATIONAL CONFERENCE ON NETWORKING, SENSING AND CONTROL (ICNSC), 2013Skilled welders can observe the weld pool and control the welding process accordingly. This implies that an advanced control system could be developed to control the welding process by emulating the estimation and decision making process of the human welder.
YuKang Liu, YuMing Zhang
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Experimental determination of weld pool geometry in gas tungsten arc welding
Science and Technology of Welding and Joining, 2001Based on the analysis of the gas tungsten arc welding (GTAW) arc spectrum, a composite light filter is designed. This filter and a normal charge coupled device camera form a vision sensor, which observes the GTAW weld pool from the topside of the workpiece.
Chuansong Wu, J. Gao
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Weld penetration control in gas tungsten arc welding (GTAW) process
IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013In this paper a predictive control system is developed to control the weld penetration in GTAW process. An innovative 3D vision based sensing system is used to measure the weld pool characteristic parameters in real-time. Weld penetration specified by the back-side bead width as output feedback is calculated by a neuro-fuzzy model using weld pool ...
YuMing Zhang, YuKang Liu
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Nonaxisymmetric Convection in Stationary Gas Tungsten Arc Weld Pools
Journal of Heat Transfer, 1997Observations of surface flow patterns of steel and aluminum GTAW pools have been made using a pulsed laser visualization system. The weld pool convection is found to be three-dimensional, with the azimuthal circulation depending on the location of the clamp with respect to the torch.
Joshi, Y +3 more
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A NEURAL NETWORK FOR WELD PENETRATION CONTROL IN GAS TUNGSTEN ARC WELDING
Acta Metallurgica Sinica (English Letters), 2006Realizing of weld penetration control in gas tungsten arc welding requires establishment of a model describing the relationship between the front-side geometrical parameters of weld pool and the back-side weld width with sufficient accuracy. A neural network model is developed to attain this aim. Welding experiments are conducted to obtain the training
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