A Study on the Change of Wire Feeding Speed in GTA Welding (Ⅰ) - Changes in the Modes of Metal Transfer -

GTA welding (GTAW) is a representative technique employed for pipe root gap welding. Although this allows the control of current and wire feeding speed as independent variables, it difficult to determine these variables ensure appropriate quality. In task, parameters automated applications are due misalignment. Accordingly, study was conducted examine changes in modes metal transfer according speed. various processes GTAW, volume form yield certain advantages disadvantages, necessitating tuning procedures maintain desired Changes heat input ratio (HIR), which relates (HI) speed, were observed predict transfer. According expressed an index, regression equation formulated through said index.