Investigations on temperature distribution during revolutionary and zigzag movement of arc in magnetically impelled arc butt welding of tubes

Abstract

The arc in MIAB welding process follow two paths of motion, one along the circumference and other comprising the zigzag motion when commuting between outer diameter and inner diameter. The moving arc dissipates necessary heat such that the butt ends reach solidification followed by forging. In this study, a pivotal attempt is made to investigate the temperature distribution during the movement of arc along and across the faying surfaces using finite element method.

Simulation Study of Critical Aspects of MIAB Welding for Analysis of Potential Factors Governing the Performance of Weld Formation

“…The force grows larger (red) far away from the centre of the beamline and smaller (blue) where two oppositely polarized quadrupoles join. This variation in the force experienced by the beam of charged particles is relatable to the reasons that may cause the non-uniform rotation speed of the arc and the magnetic arc blow effect in MIAB welding [15]. A beam of electrons with a waist located at z = 0 (Fig.…”

“…This is due to localized melting and nearby softening in the heat-affected zone (HAZ). This type of welding has been tested in the automotive sector in some European nations to fabricate butt welds on tubular sections of thickness ranging between 0.7 and 6 mm [1]. Compared to other solid-state welding procedures, this weld takes lesser time to create the weld.…”

Welding of Low Carbon Steel Tubes Using Magnetically Impelled Arc Butt Welding: Experimental Investigation and Characterization

“…Stage III-arc rotation and heating-pre-programmed arc current and time are applied based on prior trials and technical reports. Interaction of the welding current and the magnetic field causes the arc to rotate along the periphery and in zigzag movement [5] on the faying surfaces. The heating effect of the rotating arc causes the weld region temperature to rise to the material's solidus temperature.…”

“…The melted material forms a bridge in the gap between the weld tubes that may cause unstable arc rotation. Instability in the arc velocity [1][2][3]5,10] and may lead to the quenching of the arc. The two tubes are then forged together along with excess arc current for fusing the butt surfaces before arc quenching occurs.…”

“…From the 1980s, MIAB welding was employed in the automobile industry for hollow tube components such as pneumatic springs, brake rods, shock absorbers, and even for safety-critical applications like boiler heat exchangers, economizer coils, etc. [1][2][3]5]. MIAB welding has the advantages of being a solid-state process, shorter weld cycle, lesser input energy requirement, no rotation of any component and lesser loss of material.…”