| 摘要 |
PURPOSE:To reduce penetration into a base metal and to prevent consumption of the tip of an electrode in TIG welding by forming the tip of the electrode to a smooth curved face and combining electromagnetic stirring. CONSTITUTION:The tip of a tungsten electrode 11 is formed to a spherical or roudish smooth curved face. A coil 13, etc. is wound on a torch nozzle 12 that encloses the electrode 11 and connected to a power source device 14. When current is applied between the electrode 11 and the base metal 16, an arc A is generated, and a wire 15 is molten to form a molten metal 17. When a magnetic field is generated by applying magnetizing current to the coil 13 at this time, the arc A and molten metal 17 rotate. Consequently, the arc becomes soft and penetration into the base metal 16 becomes shallow. Further, consumption of the electrode 11 is decreased, and consumption becomes uniform spherically. |
