Development of numerical model in ring mash welding

Abstract When metals are joined by welding, the strength and other qualities of the products vary greatly depending on the welding conditions. In this paper, authors focus on ring mash welding used for powertrain components that transmit engine drive. This welding is required to be strong enough to withstand large loads. However, it is difficult to find appropriate welding conditions because there are many welding parameters, such as the welding current, applied force and shapes to be welded. Moreover, since the welding point is inside the base metal, it is difficult to understand the phenomena and the deformation process during welding. Therefore, it takes much time to determine welding conditions through repeated experiments and to develop and improve the welding process. Since the numerical analysis of welding phenomena is supported by theoretical analysis and plays an important role in quality assurance of welded products, the authors tried to make the numerical model using the fundamental experimental results. In this study, the visualization of the phenomena and the relationship between the welding current and the applied force made clear using the numerical simulation. The effect of welding conditions on the welding results when they are varied.