CIRCUMFERENTIAL GAS SHIELDED ARC AUTOMATIC WELDING METHOD FOR HORIZONTAL FIXED TUBULAR MEMBER AND TILTING DEVICE FOR WELDING TORCH

摘要

PURPOSE: To stabilize the welding quality by changing a welding torch angle so that the optimum welding torch angle is attained at the respective positional locations to perform welding at the time of circumferential all position welding of a horizontal fixed tubular member. ;CONSTITUTION: When the fixed tubular member whose welding position is changed every moment is welded from the interior side by the gas shielded arc welding process, the welding torch angle is set at the optimum welding torch angle 2 at the respective positional locations While the torch angle 2 also being changed to the optimum angle in accordance with the positional location to change every moment, welding is performed. In addition, a welding torch 1 is tilted with an arc generated point of the welding wire tip fed via the welding torch 1 as a center of rotation. Consequently, circumferential all position welding of the horizontal fixed tubular member can be performed efficiently with a high quality weld zone maintained.;COPYRIGHT: (C)1993,JPO&Japio