PROCEDURE FOR MANUFACTURING A NUT, TERRACE FOR PERFORMING THE PROCEDURE AND NUT MANUFACTURED ACCORDING TO THIS PROCEDURE.

摘要

Procedure for manufacturing a nut that has an actuation zone (2) and a clamping zone (3) that are manufactured forming one piece with another, so that the nut has a bore (B) that crosses the zone (3) clamping and the actuation zone (2), with a section (7) threaded at least partially cylindrical in the actuation zone (2) and a threaded section (8) at least partially conical in the clamping zone (3), characterized in that the borehole (B) that crosses the clamping zone (3) and the actuation zone (2) is manufactured as a cylindrical borehole (B), and because in this cylindrical borehole (B) a tap (15) is inserted by turning it up to a predetermined position, which, in the axial direction, seen from its front side, presents next to each other a centering cutting section (17), a cutting section (19) coupled thereto to manufacture the threaded section (8) internal conical area (3) of clamping, and a section (21) cutting e which is coupled to it to manufacture the internal cylindrical threaded section (7) in the actuation zone (2), so that the cutting section (21) for manufacturing the cylindrical internal threaded section (7) in the zone (2) of actuation has teeth (22) that run in the longitudinal direction (L), the cutting section (19) for manufacturing the conical internal threaded section (8) of the fastening area (3) presents teeth (26) that run in a manner inclined a first angle (1) with respect to the longitudinal direction (L), and the centering cutting section (17) has teeth (30) that run a second angle (2) inclined with respect to the longitudinal direction (L), so that in a first working stage the tap (15) is introduced into the hole (B) by turning it to a predetermined position, so that the teeth (22) of the cutting section (21) to manufacture the section (7) internal cylindrical thread in the zone (2) of action and the teeth (26) d e the cutting section (19) for manufacturing the conical internal threaded section (8) of the clamping zone (3) is projected in the actuation zone (2) or in the clamping zone (3), and so that the tap (15) is turned back out of the hole (B) of the nut in a subsequent working stage.