This paper presents a control system for manual pulsed Gas Metal Arc Welding (GMAW). This system consists of a current controller, which makes it possible to shape the current during welding, and two important components, which are the key issues discussed in this paper. These components include an arc length controller and a metal transfer controller. The arc length controller is based on a no...

As improving fuel economy and performance through weight reduction in vehicles are recognized as important tasks, the defense industry is researching ways to reduce of armor plates for combat increase bulletproof durability. Most manufactured using weld joints. High-hardness (HHA) used make plates; however, its mechanical properties deteriorate because hydrogen embrittlement high-temperature so...

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....

Friction stir welding (FSW) is an emerging manufacturing technology for aerospace structures. It will see widespread use in the future as it offers ways of creating lighter structures at lower manufacturing cost than traditional methods (riveting, adhesive bonding). Since its invention in 1991, FSW has known fast improvements and many studies have demonstrated its capability for joining a wide ...

The present study shows the relationship between welding quality and optical-acoustic emissions from electric arcs, during welding runs, in the GMAW-S process. Bead on plate welding tests was carried out with pre-set parameters chosen from manufacturing standards. During the welding runs interferences were induced on the welding path using paint, grease or gas faults. In each welding run arc vo...

Abstract Residual stresses and strains, distortions, heat-affected zone (HAZ), grain size changes hardness variation during gas metal arc welding (GMAW), are fundamental aspects to study control processes. For this reason, numerical simulations of the processes represent more frequently used tool better analyse several characterizing joining process with aim reduce lead time production costs. I...

Abstract Invar, also known as FeNi36, is a material of great interest due to its unique properties, which makes it an excellent alternative for sectors such tooling in aeronautics and aerospace. Its manufacture by means wire arc additive manufacturing (WAAM) technology could extend use. This paper aims evaluate the comparison two most widespread WAAM technologies: plasma welding (PAW) gas metal...