139 TIGアーク・YAGレーザハイブリッド溶接によるアークの安定化(溶接・接合のプロセスと評価)

Abstract

TIG welding process is often used to join thin metal plates because of the stability of arc compared with the other arc welding processes. However, the tungsten electrode tip of the TIG welding torch considerably consumes during the welding due to the high temperature of the arc and the oxidation by surrounding air. As a result, the shape of the electrode tip changes and the arc becomes unstable. Accordingly, in order to realize stable welding, administration of the tungsten electrode tip is important. Since the arc is essentially unstable, sometimes it becomes unstable by some other factors. On the contrary, the laser beam has extraordinary stability and directivity because of the nature of the light beam. Therefore, stabilization and control of the unstable TIG arc by the laser beam is tried. In this study, the feasibility of stabilization and control of welding arc by laser beam is studied using hybrid welding process combining TIG arc and YAG laser with relatively low power.