EP0432362A1 - Warhead - Google Patents

Abstract

The invention relates to a warhead (10) having a casing (11,11',11") surrounding the explosive (12) and a projectile-forming insert (14,14',14"), the insert being arranged circumferentially on an intermediate ring (17,17',17") which is itself fastened to the casing (11,11',11"). …<??>In order, in the region of the insert/casing parting planes, to prevent the occurrence of indeterminate chipping effects which can cause an asymmetric formation of the rear of the projectile obtained as a result of the detonation deformation, it is proposed that the intermediate ring (17,17',17") and the insert (14,14',14") should have the same acoustic impedance. …<IMAGE>…

Description

The invention relates to a warhead as defined in the preamble of claim 1.

In the detonative forming of deposits, indefinable chipping effects are often observed at the edge of the insert, i.e. in the area of the separating surfaces insert / cover. These effects are particularly great if the insert and cover are not made of the same material. The chipping effects disrupt the symmetrical formation of the rear of the projectile resulting from the detonative shaping. The projectile mass is also reduced, thus reducing the kinetic energy of the projectile.

From DE 34 41 693 a warhead of the generic type is also known, in which intermediate rings are provided with which the thermal expansion between the shell and the explosive is to be compensated. Measures to avoid the above-mentioned chipping effects are not mentioned in this document.

The invention is therefore based on the object of further developing a warhead of the type mentioned at the outset in such a way that chipping effects from the insert in the region of the insert / casing separating surfaces are avoided.

This object is achieved by the features of the characterizing part of claim 1.

The subclaims represent particularly advantageous embodiments of the invention.

The invention is therefore based on the fact that the chipping effects are primarily due to the different acoustic impedances of the casing and insert or intermediate ring and insert. According to the invention, the chipping effects are prevented by an intermediate ring which encompasses the insert over the entire circumference and whose sound impedance corresponds to that of the insert.

Further details and advantages of the invention are described below on the basis of exemplary embodiments which are explained with the aid of figures.

Fig. 1

einen Längsschnitt durch einen erfindungsgemäßen Gefechtskopf mit projektilbildender Einlage;

Fig. 2

bis

Fig. 4

verschiedene Ausführungsbeispiele der Anordnung des Zwischenringes und

Fig. 5

ein Ausführungsbeispiel, bei dem der Zwischenring mit Hilfe einer Schraube an der Hülle befestigt ist.

Show it:

Fig. 1

a longitudinal section through a warhead according to the invention with projectile-forming insert;

Fig. 2

to

Fig. 4

different embodiments of the arrangement of the intermediate ring and

Fig. 5

an embodiment in which the intermediate ring is attached to the shell by means of a screw.

The warhead according to the invention is designated by 10 in FIG. It has a shell 11 which surrounds the explosive 12. The cover 11 is provided with a cover 13 at one end and with the projectile-forming insert 14 at the opposite end. About a transfer supply and booster charge 15, the explosive 12 of the warhead 10 is detonated in a known manner. The reference numeral 16 denotes the transition area insert / casing, in which an intermediate ring 17 is arranged.

FIG. 2 shows a more detailed illustration of the cutout 16. The intermediate ring 17 lies against the inner surface of the casing and is connected to the casing 11 by frictional connection.

Fig. 3 shows a corresponding embodiment in which the intermediate ring 17 'rests in a recess on the front edge of the casing and is connected to the casing 11' by force and / or positive engagement. The particular advantage of this arrangement is that the intermediate ring is secured against axial slipping when exposed to heat (e.g. when pouring the explosive).

Fig. 4 shows an L-shaped intermediate ring 17 ", which surrounds the front edge of the casing and partially abuts the inner casing surface. In this case too, the intermediate ring 17 ″ can be connected to the sheath 11 ″ by force and / or positive locking.

An embodiment of a detachable or non-detachable connection of the intermediate ring 17 'to the sheath 11' according to FIG. 3 is shown in FIG. 4. A screw 18 was used as the connecting means. However, other connecting means such as pins or rivets can also be used.

According to the invention, the intermediate rings 17, 17 ', 17''and the inserts 14, 14', 14 '' should have the same acoustic impedance as possible, since the higher the impedance jump, the greater the damage or the irregular spalling of the projectile tail the larger the reflection coefficient is.

The table below shows the reflection coefficients for some metal combinations (the upper value represents the reflection coefficient for transverse waves and the lower value for longitudinal waves).

It can be seen from the table that the combinations Fe - Cu, Fe - Ni and Ta - Mo have a very low, but Al - W and Al - Mo have an extremely high reflection behavior.

Material combinations in which the density of the ring ζ _{R is} greater than the density of the insert ζ _E are particularly advantageous. Because in these cases there is an increase in performance due to the greater insulation effect at the edge of the insert. The projectile therefore has a higher exit speed and thus a higher kinetic energy.

In a practical exemplary embodiment, in which a Ta insert and an Fe steel housing were used, the chipping effect on the projectile tail could be reduced to zero with the aid of the pressing in of Ta impedance matching rings. The thickness of the Ta impedance matching rings was varied between 1 and 3 mm.

Reference symbol list

• 10 warhead
• 11, 11 ', 11' 'case
• 12 explosives
• 13 lid
• 14, 14 ', 14' 'projectile-forming insert
• 15 Transfer and amplifier charging
• 16 Section of the transition area insert / cover
• 17, 17 ', 17' 'intermediate ring
• 18 connecting means (screw, pin, rivet)

Claims (5)

Warhead (10) with a shell (11, 11 ', 11'') surrounding the explosive (12) and a projectile-forming insert (14, 14', 14 ''), the insert (14, 14 ', 14'') ) is arranged circumferentially on an intermediate ring (17, 17 ', 17''), which in turn is fastened to the casing (11, 11', 11 ''), characterized in that the intermediate ring (17, 17 ', 17'') and the insert (14, 14', 14 '') have the same sound impedance. Warhead according to claim 1, characterized in that the density ζ _{R of} the intermediate ring (17, 17 ', 17'') is greater than the density ζ _{E of} the insert (14, 14', 14 ''). Warhead according to claim 1 or 2, characterized in that the intermediate ring (17) is connected to the casing (11) by frictional engagement against the inner casing surface. Warhead according to claim 1 or 2, characterized in that the intermediate ring (17) in a recess on the front edge of the casing is connected to the casing (11 ') by force and / or positive locking and is secured against axial slipping under the influence of heat. Warhead according to claim 1 or 2, characterized in that the intermediate ring (17 '') is connected in an L-shape to the front of the casing and is partially connected to the casing (11 '') by force and / or positive engagement.

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