WIG-SWITZERLAND WITH UNITED DOSE FOR POINT PURPOSES AND ELECTRODENCY DOSE USED therein

摘要

The present invention allows even a beginner to easily adapt the technique and perform appropriate spot welding, achieves improved practicability, improved welding quality, improved productivity and the like.The present invention consists of a burner housing 2 for passing through a protective gas, a tungsten electrode plate 5 inserted into the burner housing 2 and connected to a cathode,a narrowed nozzle 6 to support the distal end of the tungsten electrode rod 5 concentrically and to limit a gas passage 6e between the tungsten electrode rod 5 and the narrowed nozzle 6,for the flow of a protective gas G and the release of the protective gas G from the narrowed nozzle 6 at a speed higher than the release of the protective gas G from the distal end of the combustion house 2, and a cylindrical electrode nozzle 7 with conductivity arranged concentrically with the tungsten electrode tab 5,at an external circumference of the narrowed nozzle 6, connected to an anode via a mass cable 18, and with a rejuvenated shape at the distal end area, the rejuvenated distal end area being located further outside than the distal end area of the tungsten electrode rod 5,Gas outlets 7c and 7d of the protective gas G are provided on the electrode nozzle 7.