Results 141 to 150 of about 970 (168)

Pendant droplet oscillation during GMAW

Science and Technology of Welding and Joining, 2006
This paper deals with pendant droplet oscillation in pulsed current gas metal arc welding (GMAW). Using a constant current power source, bead on plate welds were made on mild steel plates. The frequency of the pendant droplet oscillation was monitored visually (using a high speed video camera) and electronically (by analysis of the voltage signals ...
B. Y. B. Yudodibroto, M. J. M. Hermans, Y. Hirata, G. den Ouden, I. M. Richardson   +4 more
openaire   +1 more source

Dynamic modeling of GMAW process

Proceedings 1999 IEEE International Conference on Robotics and Automation (Cat. No.99CH36288C), 2003
A model has been developed correlating the anode temperature profile with the dynamic melting rate in gas metal arc welding. Components of this model are identified as the electrode melting rate, temperature-dependent resistivity of electrode and arc voltage.
Bingul, ZAFER, Cook, George E.
openaire   +3 more sources

Arc initiation in aluminium GMAW

Welding International, 2010
The use of pulsed current for MIG welding of aluminium, despite being one of the most recommended technologies, due to its better results, presents difficulties at the start of the process, principally in regard to arc initiation. With the aim of developing a more suitable process of arc initiation, two new techniques were studied: the first based on ...
Túlio Fernandes dos Santos, Jair Carlos Dutra   +1 more
openaire   +1 more source

ANODE CARBON ENRICHMENT IN GMAW

High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes), 2010
The shielding gas used in the welding process has a strong influence on the metal transfer characteristics. When the gas is chemically active the physicochemical properties of the electrodes can be strongly altered which can increase or decrease arc stability.
F. Valensi, N. Pellerin, Stephane Pellerin, M. Collumeau, A. Boutaghane, F. Briand   +5 more
openaire   +1 more source

A simplified voltage model in GMAW

Welding in the World, 2020
The relation between the voltage and the arc length in gas metal arc welding (GMAW) is an important characteristic. It determines the power transfer to a large extent, and its knowledge allows the control of the process. However, the voltage depends on a complex distribution of the electric conductivity along the current path and does not depend on the
G. Zhang, G. Goett, D. Uhrlandt, Ph. Lozano, R. Sharma   +4 more
openaire   +1 more source

Stand off's indirect estimation in GMAW

Journal of Materials Processing Technology, 2004
Abstract This work was aimed at developing a methodology for the estimation of the contact tip-to-workpiece distance (stand off) in the gas metal arc welding (GMAW) process. The proposed methodology was based on the measurement of the electrical resistance between the contact tip and the workpiece during the short circuits in the dip transfer mode of
S.C. Absi Alfaro, G.C. Carvalho, S.A. de Melo Júnior   +2 more
openaire   +1 more source

Droplet Tracking in Double-Electrode GMAW

Advanced Materials Research, 2011
Controlled metal transfer in gas metal arc welding (GMAW) and its modifications including the double-electrode GMAW implies controllable heat and mass inputs and better assured weld quality. To understand, analyze, and control the metal transfer process, the droplet should be monitored in real time.
Zhen Zhou Wang, Yang Yu, Shu Jun Chen, Yu Ming Zhang   +3 more
openaire   +1 more source

HAZ softening behavior of strain-hardened Al-6.7Mg alloy welded by GMAW and pulsed GMAW processes

The International Journal of Advanced Manufacturing Technology, 2017
Gas metal arc welding (GMAW) process was used to weld plates of strain-hardened Al-6.7Mg alloy. It was observed that HAZ softening issue occurred extensively for the current material using the GMAW process. So, as a solution, pulsed current was employed and the plates were welded by pulsed GMAW (PGMAW) process. The effects of peak current (93, 120, 140,
Amir Hadadzadeh, Majid Mahmoudi Ghaznavi, Amir Hossein Kokabi   +2 more
openaire   +1 more source

Understanding fume formation by GMAW

The control of exposure to welding fume is necessary to meet health and safety obligations. The work reported here is a continuation of a successful Cooperative Research Centre project, that has revealed how two different mechanisms are responsible for generation of fume in Gas Metal Arc Welding (GMAW).
Deam, R., Bosworth, M., McAllister, T., Norrish, J., Brooks, Geoffrey, Zhou, S., Haldar, J., Lowke, J., Farmer, A., Simpson, S.   +9 more
openaire   +1 more source

Multiple-Wire Welding GMAW and SAW

2019
This chapter presents the developments in multiple-wire welding from the technology and research perspectives. The multiple-wire welding uses more than one electrode, in which the electrodes travel simultaneously with the same or different feed rates through a joint contact tube.
Syed Quadir Moinuddin, Abhay Sharma
openaire   +1 more source