AUTOMATIC WELDING DEVICE FOR PIPE

摘要

PURPOSE: A pipe automatic welding device is provided to increase a welding arc width in a welding about a narrow-gap, and to improve a welding speed. CONSTITUTION: An automatic welding device comprises a robot main body and a welding torch (100). The robot main body moves along a circumference of a pipe. The welding torch is installed at the robot main body. The welding torch comprises a torch body (110) installed at the robot main body, a rotation body (140) installed rotatably around a vertical axis, a rotation body drive unit (150) for rotating the rotation body, an electrode (120) fixed to the rotation body, and a nozzle unit covering the electrode in a form of having a width which is thinner than a width of a narrow-gap welding unit.