Evaluation Method of Shielded Metal Arc Welding Skills Using Surface Shape Analysis

抄録

It takes a large amount of experience and time to acquire welding skills, especially since documenting such skills is difficult. There is a correlation between the body movements of a welder and the welding quality; this link should be proved for transferring welding skills from skilled welder to inexperienced welders. We have experimented with shielded metal arc welding at an actual business establishment to measure a welder's body motions. This was achieved by focusing on the welder's head and arm movements as well as the welder's angles of axial rotations. In this study, a non-contact, three-dimensional shape-measuring device was used to measure and analyze the surface shapes of welded materials, particularly the shapes of beads, for the purpose of associ ating welding quality with body motions as a basic study for future research. Individual welding skill was considered when determining the level of quality, and the quality level was based on the differences in the surface shapes of the welded materials and how they correlated with the welders' varying years of experience. Therefore, this study proposes analyzing the surface profiles of completed shielded metal arc welds by various workers to obtain a discriminant that distinguishes their degrees of experience.