Abstract A three-dimensional numerical model based on the volume-of-fluid (VOF) method is typically preferred for studying high-current gas metal arc welding (GMAW) transfer mechanism and then controlling it. It informed that rotating spray extremely complicated, some researchers have focused simplified models without considering energy conservation to make analysis manageable unstable process....

This paper introduces an intelligent system for monitoring and recognition of process disturbances during short-circuiting gas–metal arc welding. It is based on the measured and statistically processed data of welding electrical parameters. A 12-dimensional array of process features is designed to describe various welding conditions and is employed as input vector of the intelligent system. Thr...

In this paper a monitoring system that simplifies the finding of optimal welding parameters, the analysis and the optimisation of pulsed gas metal arc welding is described. The system allows the visual online observation of all states of the process, including the droplet transfer, without an additional lighting unit. Additionally, the measurement of electrical welding parameters during image r...

In this study, the effect of various welding parameters on the weldability of Mild Steel specimens having dimensions 50mm× 40mm× 6 mm welded by metal arc welding were investigated. The welding current, arc voltage, welding speed, heat input rate are chosen as welding parameters. The depth of penetrations were measured for each specimen after the welding operation on closed butt joint and the ef...

Plates of 3–5 mm in thickness were extracted from an AZ91D ingot and then butt joints of the plates were produced using tungsten inert gas (TIG) welding method. The TIG arc was also used to deposit welding beads on some of the thin plates. No cracking was found in the butt joints. However, hot cracking was always observed to propagate from the heat affected zone (HAZ) under the welding bead int...

Quenched and tempered (Q & T) steels have numerous applications, particularly in the defence industry with welding as main fabrication route. Since imparts stresses due to thermal gradients development during welding, plus fact that Q T fabricated structures are expected function a complex loading environment, it is critically important relax before exposing parts service conditions. The pr...

Este trabalho investigou os benefícios gerados pelo curto-circuito controlado (CCC) do processo de soldagem Regulated Metal Deposition (RMD) em relação ao Pulsed Gas Arc Welding (GMAW-P) quanto à aplicação revestimentos anticorrosivos sobre aços baixo-carbono. O estudo foi feito através um comparativo entre processos, para tal, foram mantidos valores velocidade arame, insumos e se trabalhou com...

Triple-wire gas indirect arc welding (TW-GIA) is a new technology with the advantages of low heat input and high deposition rate. However, humping bead restricts improvement efficiency. In this article, high-speed cameras infrared thermal imaging system were used to characterize formation mechanism TW-GIA bead. The physical model was established discuss force weld poor. And influence process pa...