Ammunition and explosives – Blasting – Detonation wave modifying
Patent
1989-03-03
1990-12-25
Nelson, Peter A.
Ammunition and explosives
Blasting
Detonation wave modifying
102310, 102476, 102501, F42B 102
Patent
active
049794434
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a liner for a warhead of the type having a liner for the production of a projectile by explosive reshaping of the liner.
U.S. Pat. No. 4,356,770 discloses a warhead including a liner in the form of a spherical segment. Explosive reshaping forms from this spherical segment an essentially rod-shaped projectile which, however, due to its aerodynamically unfavorable shape, exhibits unstable flight behavior, a high loss in velocity and consequently an unsatisfactory final ballistic performance. The great drop in velocity is caused essentially by the hemispherical shape of the projectile tip.
The unpublished German patent application No.bP 3,529,405.1 already discloses a liner for a warhead in which modification of the center of the liner permits the realization of an ogival projectile tip. However, difficulties have resulted in practice if the liner is used with a very violent explosive because the use of the above-mentioned application results in a shaped charge projectile tip which may burst open if a very violent explosive is employed.
German Patent No. 1,195,641 discloses liners for the production of projectiles by explosive reshaping in which the progressive weakening of the wall thickness of the liner produces slender projectiles which travel at a high velocity. The primary drawback of these projectiles is that the projectile tip, primarily if a violent explosive is employed, is relatively blunt because the wall thickness in the center of the liner must not fall below a given value which is a function of the explosive.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a liner for a warhead which permits the production of a projectile by explosive reshaping, with the projectile presenting a better final ballistic performance even in conjunction with violent explosives. In particular, a pointed projectile tip is to be produced so that an increase in target velocity results.
This is accomplished by the provision of a liner with a greater identation disposed on a central region of the liner on the side of the explosive.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in greater detail with reference to embodiments thereof and with the aid of drawing figures.
It is shown in:
FIG. 1, a longitudinal sectional view of a conventional warhead equipped with a liner and a projectile produced from the liner by explosive reshaping;
FIG. 2, a spherical segment shaped liner and a projectile produced from the liner;
FIG. 3, a further embodiment of a liner according to the invention together with the projectile produced from the liner by explosive reshaping; and
FIG. 4, a further liner according to the invention and its conical central region.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 shows a warhead 10 having an essentially hollow cylindrical configuration in whose housing 11 an explosive charge 13 is disposed so as to be activated by a fuze 12. Explosive charge 13 is delimited on one side by a cap-shaped liner 14 from which a projectile can be formed by explosive reshaping.
In the conventional warhead 10, liner 14 has the shape of a spherical segment. After ignition of explosive charge 13, explosive reshaping produces from such an insert a projectile as shown schematically at 15 in FIG. 1. Such projectiles exhibit a great drop in velocity during flight which is th result of the aerodynamically unfavorable configuration of the tip of projectile 15. As shown in FIG. 1, the projectile 15 produced from liner 14 has a tip in the shape of a hemisphere.
FIG. 2 shows a liner 20 having an outer diameter D and a height F along a central axis 23 of the liner 20 which, except for a central region 22, essentially corresponds to liner 14 (FIG. 1). The central region 22 has a diameter d centered about 20, and the liner has a greater convex curvature in a direction toward the side of the liner 20 adjacent the explosive 13 (FIG. 1) than the curvature of a surrounding liner portion 21 outside the region 22. It has
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Bocker Jurgen
Niemeyer Torsten
Rittel Rolf
Tripptrap Peter
Nelson Peter A.
Rheinmetall GmbH
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