Results 181 to 190 of about 3,390 (206)

Gas Tungsten Arc Welding

2019
Gas tungsten arc welding (GTAW) utilises an intense electric arc formed between a non-consumable tungsten electrode and the workpiece to generate controlled melting within the weld joint. Essentially, the arc can be used as if it was an extraordinarily hot flame. The use of a tungsten electrode and inert gas mixtures makes the process very clean. It is
openaire   +1 more source

Cross touching behavior in arcing-wire gas tungsten arc welding

Journal of Materials Processing Technology, 2018
Abstract Continuous cross touching metal transfer in arcing-wire gas tungsten arc welding using a constant-current power supply is proposed. With increasing wire feed rate, the metal transfer behavior changed from critical touching to completely touching to over touching.
Jun Wang, Muqin Li, Zhen Ma, Chunying Tian, Jian Zhang, Minghui Zhuang   +5 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

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

Gas-Shielded Tungsten-Arc Welding

1976
Gas-shielded tungsten-arc welding (called ‘T.I.G.’, ‘tungsteninert-gas’, or ‘Άrgon-arc’) is a fusion process that uses a virtually non-consumable electrode in a completely inert gas shield. The metal tungsten has the highest melting point of all metals, at 3410 °C.
openaire   +1 more source

Arc Welding Processes: Gas Tungsten Arc Welding: Electrode, Polarity and Pulse Variant

2021
This chapter describes different types of tungsten electrodes used in GTA welding process besides selection of polarity and methods of initiating welding arc. Further, the basic principle of pulse gas tungsten arc welding process has also been presented.
openaire   +1 more source

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 ...
Shiqi Zhang, Shengsun Hu, Zhijiang Wang
openaire   +1 more source

Arc Physics of Gas-Tungsten Arc Welding

1993
Abstract The gas-tungsten arc welding (GTAW) process is performed using a welding arc between a nonconsumable tungsten-base electrode and the workpieces to be joined. The arc discharge requires a flow of electrons from the cathode through the arc column to the anode.
openaire   +1 more source

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

A theoretical model for gas metal arc welding and gas tungsten arc welding. I.

Journal of Applied Physics, 1998
A recently developed theory for predicting arc and electrode properties in gas metal arc welding (GMAW) has been generalized to include arc–electrode interfaces, variation of surface tension pressure with temperature, Marangoni forces and handling of weld pool development in stationary gas tungsten arc welding (GTAW).
openaire   +1 more source