Results 261 to 270 of about 18,928 (306)

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

A Method of Feature Extraction of Position Detection and Weld Gap for GMAW Seam Tracking System of Fillet Weld With Variable Gaps

IEEE Sensors Journal, 2021
Seam-tracking technology based on vision sensing is the key technology to realize robot intelligent welding. Because of changes in the weld gap, the diversity of workpiece material and surface conditions, and the interference of welding noises, it is ...
Jiapeng Gao, Yuxiang Hong, B. Hong, Xiangwen Li, Aiting Jia, Yuanyuan Qu   +5 more
semanticscholar   +1 more source

Monitoring of weld defects of visual sensing assisted GMAW process with galvanized steel

, 2021
Due to the existence of high-temperature and high-pressure zinc vapor in the gas metal arc welding (GMAW) process of galvanized steel, it is difficult to achieve accurate and real-time detection of weld defects, which brings great challenges to robotic ...
G. Ma, Haitao Yuan, Lesheng Yu, Yinshui He   +3 more
semanticscholar   +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

Droplet measurement in laser enhanced GMAW

Proceedings of 2011 International Conference on Modelling, Identification and Control, 2011
In the laser enhanced gas metal arc welding (GMAW) process developed recently, droplets of melted metal can be detached from the wire under relatively low currents with the assistance of an auxiliary force provided by a laser. The stability and the arc and the quality of the resultant welds are improved.
null Yan Shao, null Zhenzhou Wang, null YuMing Zhang   +2 more
openaire   +1 more source

Microstructural characterization of 5083 aluminum alloy thick plates welded with GMAW and twin wire GMAW processes

The International Journal of Advanced Manufacturing Technology, 2017
Thick plates of 5083 aluminum alloy are welded with GMAW and GMAW-TW processes; the influence of weld pool convection on porosity formation, microstructure, and mechanical property of the welding joints is investigated. The results showed that due to the appearance of outward flow and “push-pull” patterns, and intense mixing and stirring effects in ...
Lijin Huang, Xueming Hua, Dongsheng Wu, Zhao Jiang, Fang Li, Huan Wang, Shaojing Shi   +6 more
openaire   +1 more source