PL246916B1 - Symmetrical fragmentation projectile body - Google Patents

Abstract

The subject of the application is a body of a symmetrically fragmented projectile made of a uniform material, preferably of a cast material, the inner surface of the wall (2) in the longitudinal cross-section having the shape of a line broken by segments (3), in the cross-section having the shape of a polygon (6), containing a space (4) for an explosive, in the frontal part containing a socket (1) for a fuse, in the rear part in relation to the direction of flight containing a mounting hole (5) for the stabilizer shaft behind the wings.

Description

Description of the invention

The subject of the invention is a projectile body with symmetrical fragmentation.

The invention belongs to the discipline of mechanical engineering.

The invention solves the technical problem of body fragmentation.

One of the basic parameters that determines the effectiveness and efficiency of a mortar or artillery shell is the uniform fragmentation of the shell body as a result of the pressure wave of the detonating explosive.

The basic way to solve this problem is to make the projectile body with the appropriate shape and wall thickness.

The American patent description US11454480 describes a method of manufacturing a projectile body in which micro-holes are made to ensure appropriate fragmentation of the projectile.

From the American patent description US9683822 a composite projectile body is known consisting of a thin outer and inner surface connected to each other, the center of which can be filled with fragments of various geometry and size.

From the American patent description US8522685 a body of a projectile is known that allows to generate fragments of different sizes. The body consists of a basic, thick part and two cylindrical inserts of small thickness and rectangular cut-outs. The longer side of the rectangular cut-outs in one insert is parallel to the axis of the projectile, and in the case of the second insert - perpendicular to the axis of the projectile. The complex structure resulting from the superposition of two inserts with holes allows to generate fragments of different geometry.

From the American patent description US 7451704 a projectile is known which consists of, among others, a projectile body and additional elements placed on the tip of the body. These elements consist of an additional layer generating fragments and a layer of explosive material. Additional elements provide greater uniformity in the distribution of the density of fragments generated by the projectile, especially near its axis.

The purpose of the invention is a projectile body that ensures its uniform fragmentation as a result of the action of the pressure wave of the detonating explosive.

The projectile body according to the invention preferably has an inner surface which is a polygonal cross-section.

The stimulation of the explosive material filling the shell causes the propagation of a detonation wave. At a certain point, the front of the detonation wave reaches the shell and turns into a shock wave, which is reflected from the outer surface of the shell, changing into a relief wave. At the same time, the increase in pressure inside the shell caused by the detonating material causes the shell to expand. The expansion of the shell combined with the interference of the relief waves propagating in the shell causes the body to fragment along lines related to the internal cross-section of the shell in the shape of a broken line.

The essence of the invention is a body of a symmetrically fragmented projectile made of a uniform material, preferably of a cast, the inner surface of the wall in the longitudinal section has the shape of a line broken by segments, in the cross-section it has the shape of a polygon, contains a space for an explosive, in the frontal part it contains a socket for a fuse, in the rear part in relation to the direction of flight it contains a mounting hole for the stabilizer shaft behind the wings.

It is advantageous when the connection of the internal surfaces of the body is rounded.

The invention is presented in the drawings, where Fig. 1 shows a view of the body in a longitudinal section showing a detail in the form of grooves defining polygons in the inner part of the body, and Fig. 2 shows a view of the body in a cross-section.

The invention in a preferred embodiment has been implemented as a projectile body made of a casting with a wall thickness (2) from 3 mm in the central part to 20 mm in the front and rear parts, with an internal surface in cross-section in the shape of a broken line (3) in cross-section in the shape of a polygon (6). The lines with broken lines (3) form grooves defining polygons in the internal part of the body. The projectile is defragmented along these lines at the moment of explosion. The body has a long-range shape with an elongated top part containing a space (4) filled with TNT, with a socket (1) for a fuse in the front part, at the end of the body with a mounting hole (5) for the stabilizer shaft behind the wings.

Claims (2)

1. A body of a symmetrical fragmentation projectile, characterized in that it is made of a uniform material, preferably of a cast, the inner surface of the wall (2) in the longitudinal section has grooves in the shape of a line broken by segments (3), in the cross-section has the shape of a polygon (6), contains a space (4) for an explosive material in the frontal part, contains a socket (1) for a fuse in the rear part relative to the direction of flight, contains a mounting hole (5) for the stabilizer shaft behind the wings. 2. The projectile body according to claim 1, characterized in that the connection of the internal surfaces of the body is rounded.