The present invention relates to a torch structure of a TIG welding apparatus, and more particularly, to a torch structure having a rectangular shape in cross section, A gas filter fixed within the gas nozzle and adapted to supply a protective gas in the form of laminar flow; The extension body located above the gas nozzle, the extension body having a rectangular cross section and being adjustable in length according to the depth of the narrowing; A utility connection provided on the extension body and connecting the power unit to the extension body; An electrode rod passing through the gas nozzle, the extension body, and the utility connection portion and extending outwardly of the gas nozzle in a round bar shape to generate an arc in the member; And a wire nozzle disposed on one side surface of the elongated body and rotatably fitted to the electrode rod, the wire nozzle supplying a welding metal during welding between the electrode rod and the member. The torch structure of the narrow-angle TIG welding apparatus according to the present invention is effective in that the shape of the torch structure can be easily inserted into the narrowed-down portion with a thin thickness and a long length so that the narrowed portion can be efficiently welded. In addition, the detachment or attachment of at least one of the extension bodies has the effect of promptly coping with the change in the length of the narrowing.
展开▼
