DE1111066B - Twist-stabilized shaped charge projectile - Google Patents

Description

The invention relates to a twist-stabilized shaped charge projectile with a lining for the insert serving for the cavity and aims to show a new technically advantageous way, around the disruption of the armor-piercing formation found with twist-stabilized hollow charge projectiles To exclude the mass beam, in other words to eliminate the disturbances that their The cause of the centrifugal forces occurring during the rotation of the bullet, which in turn have the The cause of the observed considerable reduction in the penetration capacity are.

For this purpose it is already known to insert a shell between the projectile shell and the hollow charge carrier Bearing, for example a roller bearing, to be arranged in order to transfer the angular momentum in this way to prevent the bullet shell on the shaped charge carrier as far as possible.

It is also known that the ball bearings in such projectiles, especially for the moment of Launch, to relieve the fact that a non-metallic, made of thermoplastic material supporting mass is arranged that when the projectile is fired a hydraulic cushion forms the inertia effect of the shaped charge carrier on the projectile casing transferred without the risk of deformation and at the same time the lubrication of this To secure parts.

The aforementioned proposals initially have the disadvantage that the technical effort for the storage in view of the high mechanical stresses when shooting is quite considerable is. Furthermore, due to the considerable space required by the storage units, there is a sensitive Reduction of the space available in the projectile body for the active part, which consumes at least part of the gain in effectiveness. Eventually, difficulties arise with the Stabilization, since part of the projectile mass no longer contributes to the stabilization. This fact is particularly noticeable when normal from the same pipe Twist-stabilized projectiles have to be fired.

Compared to these known proposals, the invention is based on the knowledge that the aforementioned, disturbing tangential component can cancel out that the mass particles of the Insert a tangential component is imposed during the detonation of the projectile, which the Tangential Kompo-twist-stabilized shaped charge projectile caused by the twist

Applicant:

Rheinmetall GmbH,
Düsseldorf, Ulmenstr. 125

Dipl.-Math. Franz Schaadt and Hermann Renner,

Düsseldorf,
have been named as inventors

nent is the same or almost the same, but in the opposite direction.

This oppositely directed tangential component can basically be used within the scope of the invention produced in two ways, one by corresponding shaping of the insert itself and on the other hand by appropriate design or influencing of the mass particles of the Insert detonation front acting during the detonation of the projectile.

For the first case, the invention proposes that active surfaces be provided on the insert and the latter are designed so that the mass particles of the insert during the detonation of the projectile a Tangential component is imposed, that of the tangential component caused by the twist is the same or almost the same, but in the opposite direction.

The second type of solution is that the mass particles of the insert - for example one normal funnel-shaped insert - the oppositely directed tangential component is imposed by a special explosive body used in the explosive.

But you can also combine both measures without leaving the scope of the invention, the subject matter of the invention then being characterized by the common use of active surfaces on the insert and the explosive body in the explosives.

Further details of the invention will be explained with reference to the drawings, which illustrate exemplary embodiments of the subject matter of the invention as follows:

Fig. 1 shows a first embodiment of the shaped charge projectile in longitudinal section,

109 647/73

FIG. 2 shows a cross section in the direction of the arrows AB in FIG. 1,

3 shows a second embodiment, also in longitudinal section,

FIG. 4 shows a cross section in the direction of the arrows AB in FIG. 3,

5 shows a third embodiment in longitudinal section with an explosive molded body inserted into the explosive higher detonation speed,

6 shows a cross section along the line AB in FIG. 5,

FIG. 7 shows a further exemplary embodiment corresponding to FIG. 5, but with an additionally incorporated one lenticular explosives,

FIG. 8 shows a cross section along the line AB in FIG. 7,

9 shows a detail from FIGS. 5 and

10 shows a force diagram used to explain the invention.

In relation to the exemplary embodiments according to FIGS. 1 to 4, it should first be noted in general that in these two Cases the compensation component through a peculiar design and shape of the so-called Deposit is generated.

In the case shown, the bullet casing is denoted by 1, the detonator by 2 and the explosive charge by 3. The insert 4 a according to FIGS. 1 and 2 no longer consists of a conventional circular cone, but of a cone, the cross-section of which has four sectors in the manner of a climbing wheel, which you can imagine by pivoting each quarter-circle cone along a surface line by the angle α can. As a result of this pivoting, the mass jets directed towards the projectile axis during detonation when the circular cone is not rotating are deflected by this angle α from their direction to the projectile axis. From a physical point of view, this means that a tangential component T is imposed on the mass jets, which, with the appropriate size and direction, is capable of canceling the twist component D that occurs when a twist-stabilized projectile detonates.

Mathematically exact, the circular arcs K recognizable from FIG. 2 around the offset center M should be parts of a logarithmic spiral (or an involute), in which the angle α is the constant angle between the pole ray and the normal (perpendicular to the tangent) and where the pole of this spiral coincides with the axis of the projectile.

In the example according to FIGS. 3 and 4, the design is similar, only here the insert 4 b consists of a spiral cone that can be imagined by twisting the insert 4 α in FIGS. Otherwise, however, this spiral cone can also be manufactured from a sheet metal blank by winding.

In the case of FIGS. 5 and 6, a completely normal circular cone is used as the insert. The compensation component provided according to the invention is produced here by an explosive body 5 inserted into the explosive 3. The latter consists, for example, of an explosive with a higher detonation speed than the remaining explosive component 3. Its side facing the insert shows (see also FIG. 9) a ship propeller-like boundary surface 9 over, for example, four segments S (FIG. 6). Due to this design, the path 1 (Fig. 5) of the detonation front changes in this body 5, which consists, for example, of faster detonating explosives, both depending on the distance from the projectile axis and periodically on the centering angle depending on the number of - for example four - segments.

As a result, the detonation front 10 (FIG. 9) after passing through the explosive body 5 shows a geometrically similar shape to this. One denotes

ίο in the usual way the normal to a front as the beam direction 11 (Fig. 9), so it can be seen that this is deflected after passing through the explosive body 5 from its original direction by the angle β. As a result of this angle β , the impulse on the mass of the insert no longer takes place in the direction of the bullet axis, but at the angle α to this direction in a plane that is perpendicular to the bullet axis (see FIG. 10). From a physical point of view, the mass jets also have a tangential component T here (FIG. 10). which makes it possible, in the manner already described above, with the appropriate size and direction, to cancel out the tangential component resulting from the twist.

In the embodiment according to FIGS. 7 and 8, an explosive body designated 6 is additionally used, which, due to its lens-shaped design and its, for example, higher detonation speed than with the explosive component 3, if its shape is appropriately matched to its detonation speed, causes the distances a- ä ', b-b', cc ' and d are traversed by the detonation front at the same time, so that the detonation front reaches points A, B, C and D , which lie in a plane 8, at the same time. As a result, the lens-shaped explosive body 6 transforms the detonation front 7, which starts in the shape of a spherical cap, into the flat detonation front 8. As a result of this measure, the amount of explosive acting on the insert 4 of the hollow charge is considerably increased and the penetration effect is thus increased. The compensation component is again generated here by an explosive body in the sense of the example according to FIGS. 5 and 6.

Claims (10)

PATENT CLAIMS: 1. Twist-stabilized hollow charge projectile with an insert serving as a lining for the cavity, characterized in that active surfaces (K) are provided on the insert and the latter are designed in such a way that a tangential component (T) is imposed on the mass particles of the insert during the detonation of the projectile, which is the same or almost the same as the tangential component (£>) caused by the twist, but directed in the opposite direction. 2. Twist-stabilized shaped charge projectile, characterized in that the mass particles of the insert (4) - for example a normal funnel-shaped insert - the oppositely directed tangential component (T) is imposed by a special explosive body (5) used in the explosive (3). 3. Spin-stabilized shaped charge projectile according to claims 1 and / or 2, characterized through the joint use of active surfaces (K) on the insert (4) and the explosive body (5) in the explosive (3). 4. Hollow charge projectile according to claims 1 to 3, characterized in that the insert is designed as a step cone (4 a) with an approximately climbing wheel-like cross-section. 5. shaped charge projectile according to claim 4, characterized in that the lateral surfaces of the individual segments of the step cone (4 a) are determined by circular arcs, the center of which is offset from the center of the associated circular cone. 6. shaped charge projectile according to claim 4, characterized in that the lateral surfaces of the individual segments of the step cone (4 a) bounded by sections of a logarithmic spiral whose pole falls in the axis of the bullet. 7. shaped charge projectile according to claims 1 to 3, characterized in that the insert (4 b) has a spiral stepped shape. 8. shaped charge projectile according to claim 7, characterized in that the insert (4 b) is made from a sheet metal blank by winding. 9. shaped charge projectile according to claims 2 and 3, characterized in that the im Explosives (3) used special explosive bodies (5) an approximately ship propeller-like design and its detonation speed is different from that of the rest of the explosive (3) is. 10. shaped charge projectile according to claim 9, characterized in that below the particular Explosive body (5) is a further explosive body with a lens-shaped cross-section (6) is arranged, the detonation speed of which differs from that of the rest of the explosive (3) is different. Considered publications:
French patent specification No. 1 054 322,
078 509;
British Patent No. 683,484. For this purpose 2 sheets of drawings © 109 647/73 7.61