Results 131 to 140 of about 1,769 (179)

Weld penetration sensing in pulsed gas tungsten arc welding based on arc voltage

Journal of Materials Processing Technology, 2016
Abstract An alternative to the conventional weld penetration sensing methods in pulsed gas tungsten arc welding is proposed for implementation at manufacturing sites. The fluctuation amplitude of arc voltage in the peak duration (ΔUk) reflects the weld penetration status in a single-weld spot; a fully penetrated weld spot is obtained in the step-by ...
Shengsun Hu, Zhijiang Wang
exaly   +2 more sources

Adaptive voltage control of gas tungsten arc welding

International Journal of Modelling, Identification and Control, 2006
An adaptive control based on fuzzy logic has been implemented for Gas Tungsten Arc Welding (GTAW). This adaptive controller eliminates the problems frequently experienced with traditional Automatic Voltage Control (AVC) systems, which do not adequately perform for all operational conditions because of the non-linear relationship between the arc voltage,
Reginald Crawford, George E. Cook, Alvin M. Strauss, Daniel A. Hartman   +3 more
openaire   +1 more source

Adaptive modeling of the weld pool geometry in gas tungsten arc welding

2013 10th IEEE INTERNATIONAL CONFERENCE ON NETWORKING, SENSING AND CONTROL (ICNSC), 2013
Skilled 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
openaire   +1 more source

Weld penetration control in gas tungsten arc welding (GTAW) process

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
In 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 ...
YuKang Liu, YuMing Zhang
openaire   +1 more source

Determination of gas tungsten arc welding efficiencies

Experimental Thermal and Fluid Science, 1994
A combined experimental/computational technique for the estimation of gas tungsten arc welding (GTAW) efficiencies under quasi-steady conditions is presented. The instantaneous measurements of the weld pool length ahead of and behind the electrode are obtained from digitized free surface images, using a pulsed laser vision system.
Pradip Dutta, Yogendra Joshi, C. Franche
openaire   +1 more source

Modeling of Transport Phenomena in Gas Tungsten Arc Welding Arc

Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D, 2012
This paper developed a mathematical model to simulate the transport phenomena in the arc plasma of a gas tungsten arc welding (GTAW) process. The arc model simulated the electromagnetic field in three regions — cathode, arc plasma, and anode; and heat transfer and fluid flow in the arc region.
X. Yang, J. Hu, J. Pallis
openaire   +1 more source

Numerical simulation of the arc pressure in gas tungsten arc welding

Journal of Materials Processing Technology, 1996
Abstract A two-dimensional axisymmetric numerical model has been developed to describe the heat transfer and fluid flow in the gas tungsten welding arc. The electrode-tip geometry is considered in the model and the cathode and arc column regions are included in the solution of the current continuity equation.
H.G. Fan, Y.W. Shi
openaire   +1 more source

Gas-Tungsten Arc Welding

1993
Abstract The melting temperature necessary to weld materials in the gas-tungsten arc welding (GTAW) process is obtained by maintaining an arc between a tungsten alloy electrode and a workpiece. This article discusses the advantages and limitations and applications of the GTAW process.
openaire   +1 more source

Welding structures in gas tungsten arc-welded Zircaloy-4

Metallography, 1982
Abstract Microstructures were obtained by the gas tungsten arc welding of tubes to end caps in Zircaloy-4 fuel elements and analyzed metallographically. This article characterizes the structures and the relationships between the operative variables and structural elements and properties.
Teresa Estela Perez, María Eugenia Saggese   +1 more
openaire   +1 more source

Neurofuzzy control of weld penetration in gas tungsten arc welding

Science and Technology of Welding and Joining, 2003
AbstractIn the present paper, a method using the surface geometrical parameters of the weld pool to control the weld penetration is developed. Because detection of the weld penetration is problematic and the back side maximum weld width can reflect weld penetration to some extent, a model describing the relationship between the weld pool surface ...
J. Gao, C. Wu
openaire   +1 more source