Patent EA-004118-B1 (EA)
Title: Small-calibre deformation projectile and a method for the production of the same
Inventor: BAUMGARTNER HANS
IPC: F42B12/34
Filed: 2001-05-14
Abstract: 1. Small calibre deformation projectile comprising a copper/zinc alloy, consisting of an outer hollow-cylindrical base member with a rear base and an ogive-shaped or conical front region and an at least partly cylindrical sleeve core inserted in and projecting beyond the base member, wherein in the target the base member mushrooms, characterised in that the sleeve core (2) is slidably inserted with its cylindrical part in the base member (1 ) and in that, at least on impact of the projectile (1) on the target or in the target, the sleeve core (2) is displaced axially into the annular space (3a), into a rear position, and with its rear end face (2') comes into contact with the base member. 2. Small calibre deformation projectile according to claim 1, characterised in that the base member (1) and the sleeve core (2) consist of the identical copper/zinc alloy. 3. Small calibre deformation projectile according to claim 1 or 2, characterised in that an internal annular groove (3c) is provided towards the front in the base member (1). 4. Small calibre deformation projectile according to claim 1 or 2, characterised in that an external annular groove is provided in the sleeve core (2). 5. Small calibre deformation projectile according to claim 1 or 2, characterised in that the blind hole-like bore (3b) or the cylindrical part of the sleeve core (2) have a conicity. 6. A method for the manufacture of a small calibre deformation projectile from a copper/zinc alloy consisting of an outer hollow-cylindrical base member with a rear base and an ogive-shaped or conical front region and an at least partly cylindrical sleeve core inserted in and projecting beyond the base member, wherein the sleeve core closes off, with a nonpositive fit in the base member, a hollow space and is fixedly held in a front position and wherein in the target the base member mushrooms, characterised in that the base member and sleeve core are manufactured solely by deep drawing and moulding processes and in that the cylindrical sleeve core is pressed into the hollow cylinder of the base member with a force fit, such that at least between the base and the sleeve core a hollow space is formed, which space extends across the entire inner diameter of the base member. 7. A method for manufacture of a base member according to claim 6, characterised in that circular discs are punched from flat material, the circular discs being shaped in deep drawing processes to a hollow cylindrical base member and after a subsequent calibration being squeezed to the predetermined length of the base member. 8. A method for manufacture of a sleeve core according to claim 6, characterised in that circular discs are punched from flat material, the circular discs being shaped in deep drawing processes to a hollow cylindrical body and after a subsequent calibration being squeezed to the predetermined length of the sleeve core. 9. A method according to at least one of claims 7 and 8, characterised in that the flat material is strip stock and is fed from a roller to a stamping press or stamping and drawing press. 10. A method according to claim 6, characterised in that a sleeve core is inserted in a base member and in that both parts are pressed together by a shaping die at their end faces with a positive fit and with no transitions.