RU2497066C1 - Hitting element of cassette fragmentation round - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: hitting element of cassette fragmentation round comprises case, explosive charge, initiation system and metal shell to form hitting element therefrom. Said shell is made of zirconium. Shall sizes are selected proceeding from the following relationship: 0.1<H/D≤0.5, where H is zirconium shell flexure along the axis, D is diameter.

EFFECT: higher efficiency of behind-obstacle hitting effects.

6 dwg

Description

The invention relates to the field of military equipment, in particular to cluster munitions designed to destroy armored targets and create a fragmentation field in the after-space.

The main task in the field of cluster munitions is to create a compact effective striking element with technological suitability for manufacture.

Known combat element type KOB ADP77-1 cluster fragmentation ammunition [patents: RU 2277692, IPC F42B 12/66, publ. 06/10/2006, author: Vlasova M.A., Gladtsinov A.V., Dubrovsky V.A. and etc.; RU 2262060, IPC F42B 1/02, publ. 10.10.2005, author: Abramov M.V., Vlasova M.A., Kalyuzhny G.V. et al.], comprising a casing, explosive charge (BB), fuse, cumulative multi-thickness lining made of copper. Cluster munition is designed to destroy armored vehicles, and the resulting cumulative jet pierces the armor through and through, forming a small area of destruction due to the insignificant scattering angle of the armor fragments.

The disadvantages of the known combat element cluster fragmentation munitions are:

- the main damaging fragmentation effect is provided outside the internal volumes of armored vehicles due to the expansion of fragments of the munition shell into the space surrounding this equipment;

- low efficiency in the event of defeat of lightly armored vehicles, since a high-speed cumulative jet capable of penetrating up to 180 mm of homogeneous armor can confidently penetrate both sides (the most fortified part of lightly armored vehicles), without much entering into the internal volume of any significant striking objects, in addition to the cumulative jet itself, which has a relatively small diameter (up to 10 mm) in the ammunition dimensions under consideration and the accompanying fragments attracted by it, flying under a small angles from the direction of the jet.

Known for another cluster munition, consisting of a set of compact cylindrical throwing blocks, sequentially located along the axis of the munition [patent RU 2230284, IPC F42B 12/62, publ. 06/10/2004, ed. Odintsov V.A. and etc.]. Each throwing unit is a combat element, including a body, explosive charge, an initiation system and a metal cladding, designed to form from it a striking element of the type “impact core”. The body of the striking element can be made with predetermined crushing or with the inclusion in the composition of the body of the finished striking elements. The case can be made of high-fragmentation silicon or high-carbon steels, as well as light alloys or reinforced plastic. The design of this striking element is selected as a prototype.

The disadvantage of the prototype is the low efficiency of the striking element in the case of contact detonation of the combat element, since in this case the condition necessary for the confident formation of the striking element is not fulfilled, which, in turn, reduces the level of armor penetration, not to mention the effective back-fire action. According to our many years of experience in developing striking core-type striking elements, for its final formation, a distance of the order of 5-6 calibers is required, while copper or steel striking elements are capable of piercing armor with a thickness of not more than 0.5-0.7 calibers (with the dimensions of the prototype, the size of penetration corresponding to the dimensions of BER ADP77-1 is 20–25 mm).

The problem to which the invention is directed is to ensure the destruction of lightly armored vehicles (up to 70 mm), including from distances of less than two calibers, followed by the effective anti-fragmentation incendiary action of cluster munitions while maintaining compact dimensions and the main damaging fragmentation effect.

The technical result is to increase the effectiveness of the back-end action of the ammunition by performing the lining of another material and selecting the magnitude of its deflection.

The specified technical result is achieved due to the fact that the combat element of the cluster fragmentation ammunition, which includes the body, the explosive charge, the initiation system and the metal cladding, designed to form a striking element from it, also contains new features: the cladding is made of zirconium, in the following aspect ratio: 0.1 <N / D≤0.5, where H is the deflection of the cladding along the axis, D is the diameter of the cladding from which the striking element is formed.

The use of zirconium as a facing material allows to increase the fragmentation of the damaging element when interacting with an obstacle due to the greater fragility (lower characteristics of the elastic-plastic properties) of the material used compared to, for example, copper and steel, as well as to provide an additional incendiary effect (due to a sufficient amount overwhelming entropy), due to its incendiary properties, which allow the formation of a spectrum of burning fragments with increased in comparison with the usual spectrum of fragments, a "lethal" action.

The execution of the lining with a ratio of 0.1 <N / D≤0.5 allows you to provide the conditions for the formation of the striking element with high speed and maximum use of the mass of the lining, which helps to increase the diameter of the hole due to the increase in the zone of formation and expansion of fragments.

Thus, formed from a zirconium shell in compact dimensions, taking into account the above ratio, a compact damaging element allows you to:

1. Punch, according to the calculations, steel armor of medium hardness in the thickness range up to 70 mm;

2. Increase the angle of dispersion of the armored fragments due to the larger size of the affected area;

3. To form a spectrum of burning fragments in the after-space.

Consider the implementation of the proposed device depicted in figure 1, where 1 is the housing, 2 is the explosive charge, 3 is the initiation system, 4 is the cumulative lining. Figure 2 and 3 presents the possible calculated radiographs of the damaging elements, the lining of which satisfies the characteristics described in the formula. Figure 4 shows the experimental video frame of the expansion of fragments both in front of and behind the obstacle. Figure 5 shows a photograph of a broken armored barrier 40 mm thick. Figure 6 presents a view of the back shield, struck by secondary fragments and located at a distance of 1 m behind the target. Marker marks end-to-end peripheral holes. Obviously, in the case of non-penetration of the barrier shield (in our case, playing the role of not only an indicator of the field of damage with barrier fragments, but also a simulator of the second side of the affected equipment), at least twice as many fragments interacting with the additional obstacle will be additionally sent to the internal volume.

The striking element of the cluster munition is a body made of steel material GOST 1050-80 20, the explosive charge is made of OMA TU 84-760-78, the initiation system made of plastic explosives PT-83 AOTU 472, cumulative lining for the formation of impact core ”and made of zirconium in the dimensions of BOB ADP77-1. The diameter of the lining is 40 mm, the deflection is 20 mm, which satisfies the condition 0.1 <N / D≤0.5.

The device operates as follows

A detonation pulse is supplied to the explosive charge 2 located in the housing 1 through the initiation system 3, where a symmetrical blast wave is generated, with the help of which a “shock core” is formed by “turning” the zirconium cumulative lining 4 and its subsequent compression in the radial direction with obtaining a compact striking element.

It was experimentally shown that it is possible to develop a projectile-forming charge in the dimensions of BER ADP77-1, which forms a zirconium “impact core” and is capable of confidently penetrating at least 40 mm of medium-hard armor steel from a distance of about 65 mm, forming about 800-1000 fragments / m ² and creating a spectrum of burning fragments flying at a speed of up to 2.65 km / s in the after-space (in a volume of at least 10-12 m ³ ). In this case, the central angle of fragmentation of the fragments is at least ~ 55 °, the diameter of the hole is 15 mm or more, and the ignition of fragments is ~ 100%.

Thus, the reality exceeded the estimated forecasts. In the experiment, the characteristics of the backward action of the fragments, significantly exceeding the expected ones, were obtained. The proposed device provides the penetration of lightly armored vehicles, followed by a cross-fragmentation incendiary effect.

Claims (1)

The combat element of a cluster fragmentation munition, including a housing, explosive charge, an initiation system and a metal cladding, designed to form an attacking element from it, characterized in that the cladding is made of zirconium, and its dimensions are selected from the following ratio: 0.1 <H / D≤0.5, where N is the deflection of the zirconium cladding along the axis, D is the diameter of the cladding.

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