FIELD: machine building.
SUBSTANCE: invention refers to fixture elements and to their fabrication. Here is disclosed the threaded nut made out of metal material. The nut has a threaded orifice and internal groove enveloping its longitudinal axis. Also, on one of end surfaces of the threaded nut there is made a circular flange bent to axis so, that it limits a receiving slot located directly on this surface together with a section of this end surface, enveloping the threaded orifice as a bearing surface. The circular flange is deformed in a cross section and forms a shaped flange. An end section of the shaped flange adjacent to the receiving slot has a beading and is made with a cross section wider, than the adjacent cross section of the shaped flange. The end section has thread set off relative to the rest of internal thread of the threaded orifice. The procedure for fabrication of the said threaded nut consists in forming a circular flange with a circular free upper edge on end surface of a work piece of the nut corresponding to horizontal projection of the threaded nut, and in bending the flange with a pressure tool directed along axis to longitudinal axis of the nut work piece. At treatment with pressure the circular flange is expanded in the end section on its upper edge; there is made internal thread in an axial hollow channel in the end section of the bent shaped flange of the nut work piece. Upon making internal thread, the edge of the shaped flange is set off in the direction of internal thread. The tool for processing circular flange with pressure at fabrication of the threaded nut is distinguished like follows: a directing channel of a case for a pressure puncheon is ended at a part receiving section formed with the circular edge of end surface of the tool. The pressure puncheon is installed in the directing channel and travels in axial direction. The case on the pressure puncheon can be advanced to the circular flange of the part.
EFFECT: raised efficiency of nut fabrication.
23 cl, 15 dwg
