| 摘要 |
PURPOSE:To automate fully an arc welding device by providing an oscillating mechanism which moves back and forth a welding torch across the weld line perpendicularly to the weld line to said welding device and controlling the oscillating amplitude by the arc voltage the stage of welding. CONSTITUTION:Objects 1 to be welded are butted to each other and a welding torch 6 is moved by a carriage 2 along the weld line 11 of the groove 12, thereof and automatic TIG welding is performed. An oscillating mechanism which moves back and forth the torch 6 across a weld line 11 in the horizontal and perpendicular direction with the weld line 11 is provided between a stanchion 5 and a stem 13. An arc voltage and a set value are compared in the stage of welding and the point of the time when both values coincide is determined as the distance at which an electrode 7 and the side walls of the objects 1 are substantially approached. An arc 15 is thereupon stopped for short time. Welding is thus accomplished with the oscillation controlled automatically to the correct amplitude. |
