DE1220306B - Rotationally symmetrical shaped charge with detonation wave guidance through inert material inlay in the explosive - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

Number:
File number:
Registration date:
Display day:

C06c

German KL: 78 e - 5

1220 306
B79693VIb / 78e
December 11, 1964
June 30, 1966

■., The invention relates to a rotationally symmetrical Shaped charge with an inert material inlay in the explosive between the cavity unit and the in the charge axis at the rear end of the fuse, with the rotation axes of the fuse, The explosive charge, inert material insert, cavity and cavity lining coincide. ί The geometric relationships of the concentric spatial areas of a hollow explosive charge, which the shape and the course of the wall thickness of a lining or the shape of the explosive charge or Define their envelope have already been examined in detail. Against this is the spread of the Detonation wave and the associated sweeping of the lining by the Little attention has been paid to pressure wave so far.

iThe principle of directing detonation waves is basically known. The following methods are available: either at several points at the same time to initiate a charge (German Auslegeschrift 1142 537) or from a point Wave due to inhomogeneities in different types To make directions progress at different speeds. The installation of inert parts where the speed of propagation of the shock wave without detonative decay to trigger it again a detonation wave is only a special case of the inhomogeneity principle (German Auslegeschriften 1019 948, 1070 536, 1148 926).

The difficulties of using one or the other method, however, are that the Shaped charge effect to a considerable extent due to a rotational asymmetry when sweeping over the Lining can be affected by the pressure wave, and it is in the case of such an imbalance can not lead to a perfect spine formation, but this is the prerequisite for a good penetration performance.

Simultaneous initiation at several points also has no useful and reproducible results Results because it is not possible to be "simultaneously" in the nanosecond range.

Even with the known constructions of explosive devices with one-point initiation and deflection of the spherical detonation wave around a lens (e.g. German Auslegeschrift 1019 948) the result is bad, which can be seen as an explanation for the fact that so far such constructions have found no practical application in weapons technology. ,.,

Rotationally symmetrical shaped charge with
Detonation wave guidance through
Inert material inlay in the explosive

Applicant:

Bölkow limited liability company,

Ottobrunn near Munich;

Dipl.-Ing. Franz Rudolf Thomanek,

Sandizell 38 1/4 (Kr. Schrobenhausen, Obb.)

Named as inventor:

Dipl.-Ing. Franz Rudolf Thomanek,

Sandizell (Kr. Schrobenhausen, Obb.)

If you look at a spherical detonation wave that brushes a lining, for example act the inevitable deviations from the spherical shape that are practically realizable Detonation waves occur in the same order of magnitude on the lining.

This becomes different if one lets a converging detonation wave hit the lining. In this case, the impurities or deviations of the detonation wave from the spherical shape Reinforced by about an order of magnitude so that the intersection curve from the liner body and impacting detonation wave deviates significantly from the desired circular shape.

The object of the invention is to intensify the effect of a hollow explosive charge of the type mentioned at the beginning by generating a converging detonation wave and to avoid the disadvantages of detonation wave steering occurring in this context by suitable measures.
According to the invention, this object is achieved in that the inert material insert, which consists of silicone rubber or a substance with the same explosive effectiveness, essentially has the shape of a hemispherical zone with rounded edges, with its smaller end face facing the cavity and less than half a caliber diameter away from its apex The thickness of the hemispherical zone is at least 25% of the caliber diameter and the rounding leading from the undeformed hemispherical surface to the smaller end surface has a radius which is only slightly smaller than the thickness. ^ ₁ In, the figure is a according to the invention designed

609 587/138

formed hollow explosive charge shown in longitudinal section. In this figure, 1 denotes the lining and 2 denotes the explosive charge. In the upper part of the explosive charge 2, according to the invention, a rotationally symmetrical part 3 of inert material enclosed on all sides by the charge is arranged at a distance from the end face 2a. Part 3, the z. B. can consist of silicone rubber or another material of the same explosive effectiveness, essentially has the shape of a hemispherical zone with rounded edges 3 α and 3 b. With its smaller end face 3c it faces the cavity and has a distance from it which is smaller than half the caliber diameter d ^ _ai . The thickness or height h of the hemisphere zone is at least 25% of the caliber diameter, while the c of the undeformed hemispherical surface to the smaller end face 3 via conductive rounding 3 b a radius r having, which is only slightly smaller than the thickness h.

The initiation of the explosive charge 2 takes place at the end face 2a in a punctiform, central and trouble-free manner by means of an igniter 4 which comprises a detonator 5 and a detonator 6.

Another feature of the invention is that the tolerance for deviations in the location of the Axes of rotation of the igniter 4, charge 2, inert part 3 and cavity plus lining 1 less than 0.3 mm and that according to a further embodiment, the tolerance for deviations in the Density of the explosive charge in any plane transverse to the longitudinal axis is less than 0.003.

In the case of explosive charges, which consist of compound explosives, it is also used as a solution the task required that the difference in the detonation speed of each Charges is less than 2%.

see the apex of the cavity and the detonator arranged in the charge axis at the rear end, the axes of rotation of the detonator, explosive charge, inert material insert, cavity and cavity lining coinciding, characterized in that the inert material insert consisting of silicone rubber or a substance with the same explosive effectiveness essentially has the shape of a hemispherical zone (3) with rounded edges (3 a, 3 b) , the smaller end face (3 c) facing the cavity and less than half a caliber diameter (d _{Ka {} ) away from its apex, the thickness of the hemispherical zone ( K) is at least 25% of the caliber diameter (ßnai) , and the rounding (3 b) leading from the undeformed hemispherical surface to the smaller end surface (3 c) has a radius which is only slightly smaller than the thickness (K) .

2. Rotationally symmetrical shaped charge according to claim 1, characterized in that the Tolerance for deviations in the position of the axes of rotation from the detonator (4), charge (2), Inert part (3) and cavity together with lining (1) is less than 0.3 mm.

3. Rotationally symmetrical shaped charge according to claims 1 and 2, characterized in that that the tolerance for deviations in the density of the explosive charge (2) in any. The plane transverse to the longitudinal axis is less than 0.003.

4. Rotationally symmetrical shaped charge according to claims 1 to 3, characterized in that that when combined explosive charges are used, the difference in the detonation speed of the individual charges is less than 2%.

Claims (1)

Patent claims: 1. Rotationally symmetrical shaped charge with an inert material insert in the explosive between-In Considered publications: German patents No. 1019 948, 1070 536, 1142537, 1148 926. 1 sheet of drawings 609 587/138 6.66 '© Bundesdruckerei Berlin