A Study of Heat Input Distribution on the Surface during Torch Weaving in Gas Metal Arc Welding

Abstract

In weaving welding where a V groove exists, the heat input distribution is an important factor that determines the defectiveness of the bead shape, undercut and over-lap. In this study, the amount of heat input, which is determined by the welding current, voltage, speed and weaving conditions is calculated through mathematical development and numerical methods. Furthermore, the heat input distribution as a two-dimensional heat source was observed when applied to each groove. Therefore, a heat input control algorithm is suggested to prevent the defects generated from undercut or over-lap, which was verified through an analysis of the heat input distribution.

Universal submerged arc welding (USAW): high weaving amplitudes as a new possibilities to SAW process

“…When aiming for wider weld beads in other consumable electrode processes, such as the GMAW, the transverse oscillation of the electrode, a technique known as weaving, is commonly used. The use of the weaving technique in the GMAW process is widely employed in lling chamfers, as discussed by Kim and Rhee [7], since it promotes greater width, reducing the number of passes required for lling. There are also situations, especially in narrow gap welding, where torch oscillation (weaving) is employed to increase penetration into the groove sidewalls, as studied by Wang et al [8].…”