Method for producing a nut, screw tap for the performance of the method, and a nut produce according to this method

Abstract

A nut having a clamping area and a drive area with a bore passing therethrough, the bore having a cylindrical internal threaded section that extends at least partially across the drive area and a conical internal threaded section that extends at least partially across the clamping area. The clamping area is embodied as a core with an outer circumference limited by a conical or tapered lateral area, the tip of which faces away from the drive area.

1 - 16 . (canceled)  
   
   
       17 . A nut comprising a clamping area, a drive area that is connected to the clamping area in one piece, and a support area that is arranged on a side of the drive area opposite the clamping area, said nut having a bore with a cylindrical internal threaded section that extends at least partially across the drive area, and a conical internal threaded section that extends at least partially across the clamping area, said clamping area being embodied as a core with an exterior circumference limited by a conical or tapered lateral area, a tip of said tapered lateral area facing away from the support area, and said clamping area having several axially positioned recesses distributed across said circumference which axially extend at least up to the drive area.  
   
   
       18 . The nut according to  claim 17 , wherein a radial exterior of said drive area has deformations at regular intervals on which a tool can be placed for turning out of the nut on a bolt.  
   
   
       19 . The nut according to  claim 17 , wherein said cylindrical internal threaded section and said conical internal threaded section of said bore are produced in one step by screwing in a screw tap into a cylindrical bore, said screw tap having in axial direction, viewed from its front side, a centering cutting section having teeth in the drive area which extend in longitudinal direction for production of the cylindrical internal threaded section, and a subsequently joining cutting section having teeth in the clamping area that extend at a first angle laterally to the longitudinal direction for the production of the conical internal threaded sections, and a centering cutting section having teeth that extend at a second angle laterally to the longitudinal direction, said screw tap being screwed into the bore up to a predetermined position to produce said threaded sections therein corresponding to said teeth.  
   
   
       20 . A nut comprising a clamping area and a drive area with a bore passing therethrough, said bore having a cylindrical internal threaded section that extends at least partially across the drive area and a conical internal threaded section that extends at least partially across the clamping area, said clamping area being embodied as a core with an outer circumference limited by a conical or tapered lateral area, a tip of said tapered lateral area facing away from the drive area.  
   
   
       21 . The nut according to  claim 20 , wherein said clamping area and said drive area are connected in one piece.  
   
   
       22 . The nut according to  claim 20 , wherein said clamping area includes several axially positioned recesses distributed across said circumference which axially extend at least up to the drive area.  
   
   
       23 . The nut according to  claim 20 , wherein said nut further includes a support area arranged on a side of the drive area opposite the clamping area.  
   
   
       24 . The nut according to  claim 20 , wherein a radial exterior of said drive area has deformations at regular intervals on which a tool can be placed for turning out of the nut on a bolt.  
   
   
       25 . The nut according to  claim 20 , wherein said cylindrical internal threaded section and said conical internal threaded section of said bore are produced in one step by screwing in a screw tap into a cylindrical bore, said screw tap having in axial direction, viewed from its front side, a centering cutting section having teeth in the drive area which extend in longitudinal direction for production of the cylindrical internal threaded section, and a subsequently joining cutting section having teeth in the clamping area that extend at a first angle laterally to the longitudinal direction for the production of the conical internal threaded sections, and a centering cutting section having teeth that extend at a second angle laterally to the longitudinal direction, said screw tap being screwed into the bore up to a predetermined position to produce said threaded sections therein corresponding to said teeth.