Intermediate, tool and method for producing a deformation bullet with defined terminal ballistics

Abstract

The present invention relates to a bullet, in particular a deformation bullet, such as a hollow-point bullet, for example for police and/or authority ammunition, in particular with a caliber in the range of 4.6 mm to 20 mm, comprising a bullet body with a nose wall delimiting a central cavity which is open towards the surroundings, wherein the nose wall is notched and/or the cavity is produced by cold forming in such a way that on impact of the bullet on a target the nose wall is deformed so that it is widened by less than 90°, in particular less than 60°, in particular less than 45° or less than 30°, in relation to the longitudinal axis of the bullet.

1 . Bullet, in particular a deformation bullet, such as a hollow-point bullet, for example for police and/or authority ammunition, in particular with a caliber in the range of 4.6 mm to 20 mm, comprising a bullet body with a nose wall delimiting a central cavity which is open towards the surroundings, wherein the nose wall is notched and/or the cavity is produced by cold forming in such a way that on impact of the bullet on a target, the nose wall is deformed so that it is widened by less than 90°, in particular less than 60°, in particular less than 45° or less than 30°, in relation to the longitudinal axis of the bullet. 
     
     
         2 . Bullet, in particular according to  claim 1 , in particular a deformation bullet, such as a hollow-point bullet, for example for police and/or authority ammunition, in particular with a caliber in the range of 4.6 mm to 20 mm, which consists of a bullet body produced in one piece with a nose wall delimiting a central cavity which is open towards the surroundings, the inner wall surface of which facing the cavity has at least two notches oriented in the longitudinal direction of the bullet, wherein the cavity is produced by cold forming. 
     
     
         3 . Bullet, in particular according to  claim 1 , in particular a deformation bullet, such as a hollow-point bullet, for example for police and/or authority ammunition, in particular with a caliber in the range of 4.6 mm to 20 mm, which consists of a bullet body made from one piece of iron material with a nose wall delimiting a central cavity which is open towards the surroundings, the inner wall surface of which facing the cavity has at least two notches oriented in the longitudinal direction of the bullet. 
     
     
         4 . Bullet, in particular according to  claim 1 , in particular a deformation bullet, such as a hollow-point bullet, for example for police and/or authority ammunition, in particular with a caliber in the range of 4.6 mm to 20 mm, comprising a bullet body with a nose wall delimiting a central cavity which is open towards the surroundings, the inner wall surface of which facing the cavity has at least two micro-notches oriented in the longitudinal direction of the bullet with a notch depth of less than 0.3 mm, in particular less than 0.2 mm or less than 0.1 mm. 
     
     
         5 . Bullet according to  claim 1 , wherein the notches extend by less than 25%, in particular less than 20% or less than 15%, of a total longitudinal extension of the bullet and/or by less than 50%, in particular less than 40%, less than 30% or less than 25%, of a total longitudinal extension of the cavity from the open end of the cavity in the direction of a cavity base, wherein in particular a length of the notches is in a range of 0.5 mm to 3 mm. 
     
     
         6 . Bullet according to  claim 1 , wherein the inner wall surface has 2 to 10, in particular 3 to 8, notches which are distributed uniformly, in particular in the circumferential direction. 
     
     
         7 . Bullet according to  claim 1 , which is produced without a heat treatment process, in particular annealing, and/or wherein the cavity is produced by means of backwards extrusion and/or wherein the notches are produced by cold forming, in particular in a process step with the cavity. 
     
     
         8 . Intermediate for producing a bullet formed in particular according to  claim 1 , consisting of a metal body cold-formed from a metal blank and having a hollow cylinder delimiting a central cavity which is open towards the surroundings, the hollow cylinder inner surface facing the cavity being notched in such a way, that during cold forming of the hollow cylinder to form a, in particular ogive shaped, bullet nose of the bullet, a dimension of the notch is reduced in such a way that the notch is only visible under reflected light microscopy and/or that a notch depth of less than 0.3 mm, in particular less than 0.2 mm or less than 0.1 mm, results. 
     
     
         9 . Intermediate, in particular according to  claim 8 , for producing a bullet formed in particular, comprising a iron material body produced by cold forming from an iron material blank and having a hollow cylinder delimiting a central cavity which is open towards the surroundings, the hollow cylinder inner surface facing the cavity having at least two notches oriented in the longitudinal direction of the intermediate. 
     
     
         10 . Intermediate according to  claim 8 , wherein the notches extend by less than 25%, in particular less than 20% or less than 15%, of a total longitudinal extension of the intermediate and/or by less than 50%, in particular less than 40%, less than 30% or less than 25%, of a total longitudinal extension of the cavity from the open end of the cavity in the direction of a cavity base, wherein in particular a length of the notches is in the range of 0.5 mm to 3 mm. 
     
     
         11 . Intermediate according to  claim 8 , wherein a depth and/or a width of the notches varies from the open end of the cavity towards the cavity base, wherein in particular the depth and/or the width decreases preferably continuously from the open end of the cavity towards the cavity base. 
     
     
         12 . The intermediate according to  claim 8 , wherein the notches have a depth of less than 1 mm, in particular in a range of 0.1 mm to 0.7 mm, and/or a width of less than 1.5 mm, in particular in a range of 0.1 mm to 1 mm. 
     
     
         13 . Intermediate according to  claim 8 , wherein the notches each have two V-shaped tapering notch flanks, which are oriented in particular at an angle in the range of 30° to 80°, preferably at an angle of about 60°, to one another. 
     
     
         14 . Intermediate according to  claim 8 , wherein the hollow cylinder inner surface has 2 to 10, in particular 3 to 8, notches, which are distributed uniformly, in particular in the circumferential direction. 
     
     
         15 . Intermediate according to  claim 8 , wherein the notches are produced by cold forming, in particular in a process step with the cavity. 
     
     
         16 . Press mandrel for pressing a metal blank inserted in a cylindrical die in order to produce an intermediate and/or bullet formed in particular according to  claim 1 , comprising an in particular cylindrical press head with at least two press ribs extending in the longitudinal direction of the press mandrel, the depth of which transversely to the longitudinal direction is less than 1 mm, in particular in the range of 0.1 mm to 0.7 mm. 
     
     
         17 . Press mandrel, in particular according to  claim 16 , for pressing a metal blank inserted in a cylindrical die in order to produce an intermediate formed in particular and/or a bullet, comprising a cylindrical press head with at least two press ribs extending in the longitudinal direction of the press mandrel and protruding radially from a cylinder jacket surface of the press head. 
     
     
         18 . Press mandrel, in particular according to  claim 16 , for pressing a metal blank inserted in a cylindrical die along a pressing direction in order to produce an intermediate, comprising a press head with at least two press ribs extending in the longitudinal direction of the press mandrel and protruding transversely to the longitudinal direction from an outer jacket surface of the press head, the depth of which varies transversely to the longitudinal direction in the longitudinal direction in particular decreases against the pressing direction. 
     
     
         19 . Press mandrel according to  claim 18  wherein the depth of the press ribs decreases against the pressing direction at an angle of 6° to 15°, in particular from 6° to 10°, and/or decreases over at least 80% of a longitudinal extension, in particular over at least 90% and/or less than the total longitudinal extension, of the press ribs against the pressing direction. 
     
     
         20 . Press mandrel, in particular according to  claim 16 , for pressing a metal blank inserted in a cylindrical die in order to produce an intermediate, comprising a press head with at least two press ribs extending in the longitudinal direction of the press mandrel and protruding transversely to the longitudinal direction from an outer jacket surface of the press head and which have two V-shaped press flanks whose transition is rounded, wherein in particular a radius at the transition is at least 0.01 mm and/or at most 0.2 mm. 
     
     
         21 . Press mandrel according to  claim 20 , wherein the press flanks are oriented at an angle in the range of 30° to 80°, preferably at an angle of about 60°, to one another. 
     
     
         22 . Press mandrel, in particular according to  claim 16 , for pressing a metal blank inserted in a cylindrical die in order to produce an intermediate, comprising in particular cylindrical press head with at least two press ribs extending in the longitudinal direction of the press mandrel, wherein in particular flat face side of the press head is inclined with respect to the longitudinal direction, wherein in particular a forming angle of the in particular flat face side of the press head is in the range of 105° to 135° with respect to the longitudinal direction. 
     
     
         23 . Press mandrel according to  claim 22 , wherein a transition between the face side and the press ribs is rounded, wherein in particular a radius at the transition lies in a range of 1 mm to 2 mm and/or wherein the face side has a central planar region and the press head is rounded at a transition between the central region and the inclined face side, wherein in particular a radius at the transition lies in a range of 1 mm to 2 mm. 
     
     
         24 . Press mandrel according to  claim 16 , wherein the press head comprises 2 to 10, in particular 3 to 8, press ribs, which are distributed uniformly, in particular in the circumferential direction. 
     
     
         25 . Press mandrel according to  claim 16 , wherein the press head comprises friction-reduced regions between the press ribs, wherein in particular the friction-reduced regions comprise a low surface roughness, a lubrication and/or a coating. 
     
     
         26 . Press mandrel according to  claim 16 , wherein the press head is made of a hard material, such as a hard metal, in particular with a hardness of more than 550 HV. 
     
     
         27 . Method for producing an intermediate formed in particular according to  claim 8  and/or a bullet, in which a metal blank is inserted into a cylindrical die and, in order to produce the intermediate of the bullet, the metal blank is cold-formed by means of a mandrel formed in particular according to  claim 16  in such a way that a hollow cylinder delimiting a central cavity which is open to the surroundings is formed, the hollow cylinder inner surface facing the cavity having at least two notches oriented in the longitudinal direction of the intermediate, wherein the cavity has a constant cross-section along its longitudinal extension, wherein in particular the hollow cylinder is cold-formed to form a, in particular ogive shaped, bullet nose. 
     
     
         28 . Method according to  claim 27 , wherein the notches are introduced by cold forming in a process step with the cavity. 
     
     
         29 . A fired, deformed bullet resulting from firing a bullet formed according to  claim 1  and impact of the bullet on a target, in particular a standard target.