Results 141 to 150 of about 3,416 (196)

Droplet Observer for Pulsed Gas Metal Arc Welding

2018 European Control Conference (ECC), 2018
In this paper an observer for detecting droplet detachment/no-detachment for a pulsed gas metal arc welding (GMAW) is developed. The observer is based on simple calculations made on the measured welding apparatus voltage. Two phenomena are used in the observer, one is the shape of the voltage in a limited time interval and the other is detection of a ...
Kirsten Mølgaard Nielsen, Tom Søndergaard Pedersen, Steffan K. Ovedahl   +2 more
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Metal transfer measurements in gas metal arc welding

Journal of Physics D: Applied Physics, 2001
The present work reports results obtained using combined laser shadowing and cross correlation techniques to investigate the metal transfer process. Experimental results of the droplet size and velocity of 0.9 mm and 1.2 mm wires from the globular region to the spray transfer region are presented.
Q Lin, X Li, S W Simpson
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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).
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Advancements in pulse gas metal arc welding

Journal of Materials Processing Technology, 2005
Environmental concerns have driven manufactures to look for alternative materials like aluminium that are lighter in weight and possess good thermal and electrical conductivity. However, fabrication of alternative materials presents a considerable challenge for fabrication in volume production.
Posinasetti, Praveen, Yarlagadda, Prasad, Kang, Mun-Jin   +2 more
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Advanced gas metal arc welding processes

The International Journal of Advanced Manufacturing Technology, 2012
There is an increased requirement in the automotive, food and medical equipment industries to weld heat-sensitive materials, such as thin sheets, coated thin plates, stainless steel, aluminium and mixed joints. Nevertheless, relevant innovations in arc welding are not widely known and seldom used to their maximum potential. In the area of gas metal arc
Martikainen Jukka, Kah Paul, Suoranta Raimo   +2 more
openaire   +1 more source

Multifractal analysis for gas metal arc welding

The International Journal of Advanced Manufacturing Technology, 2017
The gas metal arc welding (GMAW) is a complicated chaotic dynamic process and its arc electrical signals have the characteristics of both chaos and fractals. The multifractal can accurately depict the geometric characteristics and local scale behaviors of time series signals.
Yong Huang, Kehong Wang, Jimi Fang, Xiaoxiao Zhou   +3 more
openaire   +1 more source

Metal gas reactions in gas-shielded arc welding

Welding International, 1988
Abstract Mixed gas-shielded arc welding is becoming more and more popular. The influences of the gas components on arc and material transfer are known to a considerable extent. There is as yet no general quantitative description of the chemical behaviour of the gases dependent on the composition of the gas shield in arc welding.
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Metal transfer instability in gas metal arc welding

Science and Technology of Welding and Joining, 2009
This work presents a simplified model of metal transfer in gas metal arc welding. The model incorporates key features of metal transfer including the change in droplet diameters as welding moves from the globular into the spray metal transfer region, and the increase in welding voltage that is observed to occur as the pendant droplet grows.
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Feedback linearization based arc length control for gas metal arc welding

Proceedings of the 2005, American Control Conference, 2005., 2005
In this paper a feedback linearization based arc length controller for gas metal arc welding (GMAW) is described. A nonlinear model describing the dynamic arc length is transformed into a system where nonlinearities can be cancelled by a nonlinear state feedback control part, and thus, leaving only a linear system to be controlled by linear state ...
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Arc parameters and metal transfer in gas metal arc welding

1993
Vita. ; Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering ; Includes bibliographical references. ; by Pär Göran Jönsson. ; Sc.D.
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