TIG or micro plasma welding process of (hollow) stainless steel tubes with an internal dimension less than or equal to 4 mm, and whose walls have a maximum thickness of 1 mm, in order not to alter the internal shape of the tube or bridge fusion.

摘要

TIG or micro plasma welding process of hollow stainless steel tubes with an internal dimension less than or equal to 4 mm, and whose walls have a maximum thickness of 1 mm, in order not to alter the internal shape of the tube at the melting point , characterized by: - A pre-machining of the parts to be welded with a tolerance of 1 / 100th of a mm at the adjoining parts (a) on which the welding takes place, - The introduction of a tungsten rod (b), whose particularity is to accumulate heat without expanding thanks to a much higher melting point than stainless steel, thus preserving the shape and dimensions of the internal section of the tube, - TIG welding or micro plasma by fusion in full penetration of the elements reported according to an intensity varying from 43 to 5 amps in the case of TIG welding, and 3 to 5 amps in the case of micro plasma welding. Figure for the abstract Fig. 1