| 摘要 |
PURPOSE:To stably weld a sheet metal by a thin width bead at a high speed by forming an extremely thin addition wire to a hot wire through an elastic body. CONSTITUTION:A wire 7 is allowed to pass through the center of a ceramic tube 17, so that the wire 7 can be brought into contact stably with the tip of a contact tip 14 and can be subjected to electric conduction by a plate spring 16. During a wire extension L to a base metal molten pool 20, it is guided to the vicinity of an arc 4 as near as possible by using the ceramic tube 17. According to this constitution, the wire electric conduction and a position of the tip are stabilized. Supply of the wire is performed in a sequence for starting an arc after it is detected that the wire 7 comes into contact with the base metal 3. |
