EP1870640B1 - Warhead generating an explosively formed tubular projectile - Google Patents

Warhead generating an explosively formed tubular projectile Download PDF

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Publication number
EP1870640B1
EP1870640B1 EP07290750A EP07290750A EP1870640B1 EP 1870640 B1 EP1870640 B1 EP 1870640B1 EP 07290750 A EP07290750 A EP 07290750A EP 07290750 A EP07290750 A EP 07290750A EP 1870640 B1 EP1870640 B1 EP 1870640B1
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EP
European Patent Office
Prior art keywords
insert
coating
charge
warhead
explosive charge
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EP07290750A
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German (de)
French (fr)
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EP1870640A3 (en
EP1870640A2 (en
Inventor
Rémi Boulanger
Jean-Paul Duparc
Yann Menard
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Nexter Munitions SA
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Nexter Munitions SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/02—Shaped or hollow charges
    • F42B1/024—Shaped or hollow charges provided with embedded bodies of inert material

Definitions

  • the technical field of the invention is that of the warheads formed charge, and more particularly that of the core generating charges.
  • the formed charge warheads conventionally include a concave liner which is applied against an explosive charge associated with initiating means.
  • Core generating charges generally have a coating generally having the shape of a spherical cap. During the detonation of the explosive, this coating is set in motion by the incident pressure wave. It is deformed by turning "in glove finger", that is to say that it is transformed into a projectile (or nucleus) whose front part is constituted by the central zone of the coating and the rear part is a formed skirt by the periphery of the coating.
  • the FR2627580 describes such a charge.
  • the FR-2698163 describes a piercing projectile associating a bar and a shaped charge. It is indicated that the charge formed may be a core generating charge and the bar passes through the coating of the formed charge to generate a tubular core.
  • the bar has a feathered portion outside the casing, a middle part inside the load and a free front part. This patent does not provide for a positioning of the rear part of the bar inside the explosive charge and at a distance from the bottom of the casing of the load.
  • the WO 85/01572 describes a hybrid charge intended more particularly for a buried mine.
  • This charge comprises a cylindrical metal tube which is incorporated in the explosive charge and surrounded by an inert case. This load is intended to produce during operation a projectile constituted by the tube and a second projectile constituted by the disk or coating.
  • the detonation wave bypasses the shaper and causes axial compression of the tube which is projected at high speed ahead of the disc.
  • the FR-2771486 discloses a detector mount for a formed charge ammunition.
  • this munition there is provided an electrical connection to a high frequency element. This is to promote the kinetic distribution of gases to obtain a projectile rich in energy.
  • the US Patent 3948181 discloses a hollow charge incorporating incendiary material for penetrating a target behind the jet formed by the charge. It is not about conformation of a projectile.
  • the patent US-4841864 discloses a tubular core generating charge according to the preamble of the independent claim 1.
  • This load comprises a mandrel which is disposed on the outer face of the coating of the load and which ensures the shaping of the tubular core.
  • the vibrations received by the military head during its operational implementation will lead to a separation of the mandrel and the coating or to a simple misalignment leading to poor formation of the core.
  • a piercing projectile associating a bar and a shaped charge.
  • the load can alternatively be a load generating a tubular core.
  • this projectile has the main function of ensuring a perforation by a kinetic bar and the size of the ammunition is important.
  • the object of the invention is to propose a military head that does not have such disadvantages.
  • the head according to the invention thus has a reduced axial size while having a robust structure for operational integration in an ammunition.
  • the invention relates to a shaped warhead having a concave coating applied against an explosive charge, disposed in a casing having a bottom, and which is associated with priming means, head having at least one insert disposed in an axial manner with respect to the coating, which insert is intended to give a tubular profile to the core generated by the coating during the initiation of the explosive charge, characterized in that the insert passes completely through the coating and penetrates into the the interior of the explosive charge, the insert having a rear portion which is remote from the bottom of the envelope.
  • the rear part of the insert will be at a distance from the bottom of the casing greater than or equal to the diameter of the insert.
  • the length of the insert which is located outside the load will preferably be greater than or equal to 0.5 times the size of the load.
  • the insert may be completely cylindrical.
  • the insert may comprise a conical rear portion.
  • only the tapered rear part of the insert can enter the explosive charge.
  • the head advantageously incorporates a rear containment block which has a cylindrical outer surface fitted to the inner housing of the casing and has a conical inner bore whose conicity is substantially the same as that of the rear part of the insert.
  • the insert may be made of steel.
  • a shaped charge warhead 1 has a concave coating 2 which is applied against an explosive charge 3 contained in an envelope 4.
  • the explosive charge 3 is associated with means of initiation which comprise a detonator 5, integral with a bottom 4a or rear part of the casing 4, and a detonation relay 6 which is interposed between the detonator 5 and the explosive charge 3.
  • This head 1 comprises an insert 7 which is arranged axially with respect to the coating 2.
  • the insert 7 has the same axis of symmetry 8 as the warhead 1. It is intended to form the coating during the initiation of the explosive charge so as to produce a tubular projectile.
  • the insert 7 passes completely through the coating 2 and penetrates inside the explosive charge 3.
  • a cylindrical bore 9 is made inside the load 3. This machining is performed after the casting and the solidification of the load 3.
  • the insert 7 is thus held both by the bore 9 and the coating 2.
  • the securing of the insert is ensured by gluing.
  • a material having a sufficient mechanical strength will be chosen to support the deformation of the coating 2 as well as the guiding and the formation of the latter.
  • the steel insert may be made with a coating made of nickel.
  • the insert comprises a rear portion 10 which is located at a distance D from the bottom 4a of the casing 4 (and also at a distance from the priming means 5, 6).
  • This distance D is preferably greater than the diameter (d) of the insert.
  • the distance D makes it possible to ensure that the insert does not disturb the initiation of the explosive charge 3 nor does it hinder the progression of the detonation wave inside the explosive charge 3.
  • the length L of the insert which is located outside the load will be chosen greater than or equal to half the caliber C of the load.
  • the caliber C considered here is the value of the outer diameter of the coating 2. We will thus have L ⁇ 0.5 C.
  • the insert 7 will have a diameter d which will be chosen according to the desired diameter for the internal bore of the tubular core. It will be noted that the greater this diameter d is, the more the tubular core obtained can realize a cut reactive protection without initiating it. Indeed, for a large bore diameter of the core, there is no recombination shock waves at the level of the explosive impacted reactive protection.
  • the insert 7 is completely cylindrical. It is of course possible to give the insert a different profile, for example slightly conical.
  • the figure 2 shows a military head 1 according to a second embodiment of the invention.
  • the insert 7 has a rear portion 11 which is conical and which is placed in a complementary conical housing 12 which is machined in the explosive charge 3.
  • the conical rear portion 11 of the insert enters the explosive charge 3, the cylindrical portion of the insert is guided by the axial bore of the coating 2.
  • the insert 7 is again glued to the explosive charge 3.
  • the rear tip of the cone 11 is at a distance D from the bottom 4a of the casing 4 (and also at a distance from the priming means 5, 6).
  • the military head 1 also incorporates a rear containment block 13 which has a cylindrical outer surface fitted to the inner housing of the casing 4 and which has a conical inner bore 14.
  • This containment block 13 is made for example of a light alloy (for example an aluminum alloy) or plastic. Block 13 guides the detonation wave in the explosive charge 3 during the initiation of the latter.
  • the taper of the bore 14 is substantially the same as that of the rear portion 11 of the insert 7.
  • the rear portion 11 of the insert acts as a shaper for the detonation wave. This embodiment therefore ensures both a good maintenance of the insert and a good initiation of the load.
  • tubular cores having a large internal diameter are particularly interesting because they can cut a reactive protection without initiating it.
  • a large diameter is obtained for the boring of the core by increasing the diameter of the insert, but there is then the problem of the bootability of the explosive charge of the warhead itself.
  • This embodiment of the invention therefore makes it possible to ensure the primability of the military head incorporating an insert of large diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Coating Apparatus (AREA)
  • Golf Clubs (AREA)
  • Paper (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Powder Metallurgy (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

The military head (1) charged with a concave coating (2) applied against an explosive charge (3) disposed in an envelope (4) having a bottom, comprises an initiation unit, a cylindrical steel insert (7) disposed axially with respect to the coating, a rear containment block having a cylindrical external surface adjusted with an internal housing of the envelope, and an internal conical bore. The insert is intended to give a tubular profile to a core generated by the coating during the initiation of the explosive charge. The military head (1) charged with a concave coating (2) applied against an explosive charge (3) disposed in an envelope (4) having a bottom, comprises an initiation unit, a cylindrical steel insert (7) disposed axially with respect to the coating, a rear containment block having a cylindrical external surface adjusted with an internal housing of the envelope, and an internal conical bore. The insert is intended to give a tubular profile to a core generated by the coating during the initiation of the explosive charge, and completely extends the coating and penetrates inside the explosive charge. The insert comprises a conical rear portion located at a distance from the bottom of the envelope, where the distance is greater than or equal to a diameter of the insert. A conicity of the internal conical bore is same as the conical rear portion of the insert. A length of the insert is located outside of the charge, where the length is >=0.5 times a size of the charge. The conical rear portion of the insert penetrates inside the explosive charge.

Description

Le domaine technique de l'invention est celui des têtes militaires à charge formée, et plus particulièrement celui des charges génératrices de noyau.The technical field of the invention is that of the warheads formed charge, and more particularly that of the core generating charges.

Les têtes militaires à charge formée comportent d'une façon classique un revêtement concave qui est appliqué contre un chargement explosif associé à des moyens d'amorçage.The formed charge warheads conventionally include a concave liner which is applied against an explosive charge associated with initiating means.

Les charges génératrices de noyau ont généralement un revêtement ayant globalement la forme d'une calotte sphérique. Lors de la détonation de l'explosif, ce revêtement est mis en mouvement par l'onde de pression incidente. Il se déforme en se retournant "en doigt de gant", c'est à dire qu'il se transforme en un projectile (ou noyau) dont la partie avant est constituée par la zone centrale du revêtement et la partie arrière est une jupe formée par la périphérie du revêtement. Le brevet FR2627580 décrit une telle charge.Core generating charges generally have a coating generally having the shape of a spherical cap. During the detonation of the explosive, this coating is set in motion by the incident pressure wave. It is deformed by turning "in glove finger", that is to say that it is transformed into a projectile (or nucleus) whose front part is constituted by the central zone of the coating and the rear part is a formed skirt by the periphery of the coating. The FR2627580 describes such a charge.

Dans certaines applications balistiques on cherche à réaliser des noyaux ayant une forme tubulaire.In some ballistic applications, it is sought to produce cores having a tubular shape.

En effet de tels noyaux permettent d'obtenir des capacités de perforation particulièrement intéressantes contre les surprotections réactives des engins blindés.Indeed, such cores make it possible to obtain particularly advantageous perforation capacities against the reactive overprotection of armored vehicles.

En effet ils réalisent sur ces dernières une découpe cylindrique qui n'initie pas la protection réactive, ce qui permet de limiter les effets collatéraux.Indeed they realize on the latter a cylindrical cut which does not initiate the reactive protection, which allows to limit the collateral effects.

Il est alors particulièrement intéressant d'associer dans une tête tandem une telle charge à noyau tubulaire avec une charge creuse pour obtenir des performances de perforation importantes sur des blindages surprotégés.It is then particularly advantageous to associate in a tandem head such a tubular core load with a hollow charge to obtain high perforation performance on overprotected armor.

Le brevet FR-2698163 décrit un projectile de perforation associant un barreau et une charge formée. On indique que la charge formée peut être un charge génératrice de noyau et le barreau traverse le revêtement de la charge formée pour engendrer un noyau tubulaire. Le barreau présente une partie empennée à l'extérieur de l'enveloppe, une partie médiane à l'intérieur du chargement et une partie avant libre. Ce brevet ne prévoit pas un positionnement de la partie arrière du barreau à l'intérieur du chargement explosif et à distance du fond de l'enveloppe de la charge.The FR-2698163 describes a piercing projectile associating a bar and a shaped charge. It is indicated that the charge formed may be a core generating charge and the bar passes through the coating of the formed charge to generate a tubular core. The bar has a feathered portion outside the casing, a middle part inside the load and a free front part. This patent does not provide for a positioning of the rear part of the bar inside the explosive charge and at a distance from the bottom of the casing of the load.

Le brevet WO 85/01572 décrit une charge hybride destinée plus particulièrement à une mine enfouie. Cette charge comporte un tube cylindrique métallique qui est incorporé dans la charge explosive et entouré d'un étui inerte. Cette charge est prévue pour produire lors du fonctionnement un projectile constitué par le tube et un second projectile constitué par le disque ou revêtement. L'onde de détonation contourne le conformateur et provoque une compression axiale du tube qui se trouve projeté à haute vitesse en avant du disque.The WO 85/01572 describes a hybrid charge intended more particularly for a buried mine. This charge comprises a cylindrical metal tube which is incorporated in the explosive charge and surrounded by an inert case. This load is intended to produce during operation a projectile constituted by the tube and a second projectile constituted by the disk or coating. The detonation wave bypasses the shaper and causes axial compression of the tube which is projected at high speed ahead of the disc.

Le brevet FR-2771486 décrit un montage de détecteur pour une munition à charge formée. Dans cette munition, on prévoit un raccordement électrique à un élément haute fréquence. Il s'agit de favoriser la distribution cinétique des gaz pour obtenir un projectile riche en énergie.The FR-2771486 discloses a detector mount for a formed charge ammunition. In this munition, there is provided an electrical connection to a high frequency element. This is to promote the kinetic distribution of gases to obtain a projectile rich in energy.

Le brevet US-3948181 décrit une charge creuse incorporant un matériau incendiaire destiné à pénétrer une cible en arrière du jet formé par la charge. Il ne s'agit pas de conformation d'un projectile.The US Patent 3948181 discloses a hollow charge incorporating incendiary material for penetrating a target behind the jet formed by the charge. It is not about conformation of a projectile.

Le brevet US-4841864 décrit une charge génératrice de noyau tubulaire selon le préambule de la revendication indépendante 1. Cette charge comporte un mandrin qui est disposé sur la face externe du revêtement de la charge et qui assure la mise en forme du noyau tubulaire.The patent US-4841864 discloses a tubular core generating charge according to the preamble of the independent claim 1. This load comprises a mandrel which is disposed on the outer face of the coating of the load and which ensures the shaping of the tubular core.

La charge décrite par ce brevet présente des inconvénients. En effet le mandrin mis en oeuvre est particulièrement long et sa fixation sur le revêtement est délicate. Cette charge est donc peu adaptée à une intégration effective dans un projectile opérationnel et elle constitue plutôt un dispositif d'essai ou de laboratoire.The charge described by this patent has drawbacks. Indeed the mandrel used is particularly long and its attachment to the coating is delicate. This load is therefore not suited to effective integration into an operational projectile and is rather a test device or laboratory.

Les vibrations reçues par la tête militaire lors de sa mise en oeuvre opérationnelle conduiront à une désolidarisation du mandrin et du revêtement ou encore à un simple désaxage conduisant à une mauvaise formation du noyau. On connaît aussi par FR2698163 un projectile de perforation associant un barreau et une charge formée. La charge peut suivant une variante être une charge engendrant un noyau tubulaire. Cependant ce projectile a pour fonction principale d'assurer une perforation par un barreau cinétique et l'encombrement de la munition est donc important.The vibrations received by the military head during its operational implementation will lead to a separation of the mandrel and the coating or to a simple misalignment leading to poor formation of the core. We also know by FR2698163 a piercing projectile associating a bar and a shaped charge. The load can alternatively be a load generating a tubular core. However, this projectile has the main function of ensuring a perforation by a kinetic bar and the size of the ammunition is important.

On connaît enfin par WO85/01572 une charge explosive hybride associant un tube cylindrique et un revêtement en forme de disque. Cependant, cette charge ne permet pas d'assurer la formation d'un noyau tubulaire puisqu'elle projette le tube cylindrique en avant du revêtement.We finally know by WO85 / 01572 a hybrid explosive charge associating a cylindrical tube and a disc-shaped coating. However, this load does not allow to ensure the formation of a tubular core since it projects the cylindrical tube in front of the coating.

L'invention a pour objet de proposer une tête militaire ne présentant pas de tels inconvénients.The object of the invention is to propose a military head that does not have such disadvantages.

La tête selon l'invention a ainsi un encombrement axial réduit tout en ayant une structure robuste permettant une intégration opérationnelle dans une munition.The head according to the invention thus has a reduced axial size while having a robust structure for operational integration in an ammunition.

Ainsi, l'invention a pour objet une tête militaire à charge formée comportant un revêtement concave appliqué contre un chargement explosif, disposé dans une enveloppe comportant un fond, et qui est associé à des moyens d'amorçage, tête comportant au moins un insert disposé d'une façon axiale par rapport au revêtement, insert qui est destiné à donner un profil tubulaire au noyau engendré par le revêtement lors de l'initiation du chargement explosif, tête caractérisé en ce que l'insert traverse complètement le revêtement et pénètre à l'intérieur du chargement explosif, l'insert comportant une partie arrière qui se situe à distance du fond de l'enveloppe.Thus, the invention relates to a shaped warhead having a concave coating applied against an explosive charge, disposed in a casing having a bottom, and which is associated with priming means, head having at least one insert disposed in an axial manner with respect to the coating, which insert is intended to give a tubular profile to the core generated by the coating during the initiation of the explosive charge, characterized in that the insert passes completely through the coating and penetrates into the the interior of the explosive charge, the insert having a rear portion which is remote from the bottom of the envelope.

Avantageusement, la partie arrière de l'insert se trouvera à une distance du fond de l'enveloppe supérieure ou égale au diamètre de l'insert.Advantageously, the rear part of the insert will be at a distance from the bottom of the casing greater than or equal to the diameter of the insert.

La longueur de l'insert qui est située à l'extérieur de la charge sera de préférence supérieure ou égale à 0,5 fois le calibre de la charge.The length of the insert which is located outside the load will preferably be greater than or equal to 0.5 times the size of the load.

Selon un premier mode de réalisation, l'insert pourra être complètement cylindrique.According to a first embodiment, the insert may be completely cylindrical.

Selon un second mode de réalisation, l'insert pourra comporter une partie arrière conique.According to a second embodiment, the insert may comprise a conical rear portion.

Selon une autre caractéristique, seule la partie arrière conique de l'insert pourra pénétrer dans le chargement explosif.According to another characteristic, only the tapered rear part of the insert can enter the explosive charge.

La tête incorpore avantageusement un bloc de confinement arrière qui comporte une surface externe cylindrique ajustée au logement interne de l'enveloppe et présente un alésage interne conique dont la conicité est sensiblement la même que celle de la partie arrière de l'insert.The head advantageously incorporates a rear containment block which has a cylindrical outer surface fitted to the inner housing of the casing and has a conical inner bore whose conicity is substantially the same as that of the rear part of the insert.

L'insert pourra être réalisé en acier.The insert may be made of steel.

D'autres avantages de l'invention apparaîtront à la lecture de la description qui va suivre de modes particuliers de réalisation, description faite en référence aux dessins annexés et dans lesquels :

  • la figure 1 montre en coupe longitudinale une tête militaire selon un premier mode de réalisation de l'invention,
  • la figure 2 montre en coupe longitudinale une tête militaire selon un deuxième mode de réalisation de l'invention.
Other advantages of the invention will appear on reading the following description of particular embodiments, a description given with reference to the appended drawings and in which:
  • the figure 1 shows in longitudinal section a military head according to a first embodiment of the invention,
  • the figure 2 shows in longitudinal section a military head according to a second embodiment of the invention.

En se reportant à la figure 1, une tête militaire 1 à charge formée comporte un revêtement concave 2 qui est appliqué contre un chargement explosif 3 contenu dans une enveloppe 4.Referring to the figure 1 a shaped charge warhead 1 has a concave coating 2 which is applied against an explosive charge 3 contained in an envelope 4.

Le chargement explosif 3 est associé à des moyens d'amorçage qui comportent un détonateur 5, solidaire d'un fond 4a ou partie arrière de l'enveloppe 4, et un relais de détonation 6 qui est interposé entre le détonateur 5 et le chargement explosif 3.The explosive charge 3 is associated with means of initiation which comprise a detonator 5, integral with a bottom 4a or rear part of the casing 4, and a detonation relay 6 which is interposed between the detonator 5 and the explosive charge 3.

Cette tête 1 comporte un insert 7 qui est disposé d'une façon axiale par rapport au revêtement 2. L'insert 7 a même axe de symétrie 8 que la tête militaire 1. Il est destiné à former le revêtement lors de l'initiation du chargement explosif de façon à réaliser un projectile tubulaire.This head 1 comprises an insert 7 which is arranged axially with respect to the coating 2. The insert 7 has the same axis of symmetry 8 as the warhead 1. It is intended to form the coating during the initiation of the explosive charge so as to produce a tubular projectile.

Selon une caractéristique importante de l'invention, l'insert 7 traverse complètement le revêtement 2 et il pénètre à l'intérieur du chargement explosif 3.According to an important characteristic of the invention, the insert 7 passes completely through the coating 2 and penetrates inside the explosive charge 3.

Pour recevoir l'insert 7, on réalise un alésage cylindrique 9 à l'intérieur du chargement 3. Cet usinage est réalisé après la coulée et la solidification du chargement 3.To receive the insert 7, a cylindrical bore 9 is made inside the load 3. This machining is performed after the casting and the solidification of the load 3.

L'insert 7 se trouve ainsi maintenu à la fois par l'alésage 9 et par le revêtement 2. La solidarisation de l'insert est assurée par collage.The insert 7 is thus held both by the bore 9 and the coating 2. The securing of the insert is ensured by gluing.

On pourrait également prévoir un fond 4a démontable et réaliser une coulée du chargement explosif 3, par l'arrière de la charge, directement sur le revêtement portant l'insert.One could also provide a removable bottom 4a and perform a casting of the explosive charge 3, from the rear of the load, directly on the coating carrying the insert.

Concernant le matériau de l'insert, on choisira un matériau ayant une résistance mécanique suffisante pour supporter la mise en déformation du revêtement 2 ainsi que le guidage et la formation de ce dernier.As regards the material of the insert, a material having a sufficient mechanical strength will be chosen to support the deformation of the coating 2 as well as the guiding and the formation of the latter.

On pourra par exemple réaliser l'insert en acier avec un revêtement réalisé en nickel.For example, the steel insert may be made with a coating made of nickel.

Suivant une autre caractéristique de l'invention l'insert comporte une partie arrière 10 qui se situe à distance D du fond 4a de l'enveloppe 4 (et également à distance des moyens d'amorçage 5,6).According to another characteristic of the invention the insert comprises a rear portion 10 which is located at a distance D from the bottom 4a of the casing 4 (and also at a distance from the priming means 5, 6).

Cette distance D est de préférence supérieure au diamètre (d) de l'insert.This distance D is preferably greater than the diameter (d) of the insert.

La distance D permet d'assurer que l'insert ne perturbe pas l'initiation du chargement explosif 3 et ne gêne pas non plus la progression de l'onde de détonation à l'intérieur du chargement explosif 3.The distance D makes it possible to ensure that the insert does not disturb the initiation of the explosive charge 3 nor does it hinder the progression of the detonation wave inside the explosive charge 3.

Afin d'assurer une bonne formation du noyau tubulaire, la longueur L de l'insert qui est située à l'extérieur de la charge sera choisie supérieure ou égale à la moitié du calibre C de la charge. Le calibre C considéré est ici la valeur du diamètre externe du revêtement 2. On aura donc L ≥ 0,5 C.In order to ensure a good formation of the tubular core, the length L of the insert which is located outside the load will be chosen greater than or equal to half the caliber C of the load. The caliber C considered here is the value of the outer diameter of the coating 2. We will thus have L ≥ 0.5 C.

L'insert 7 aura un diamètre d qui sera choisi en fonction du diamètre souhaité pour l'alésage interne du noyau tubulaire. On notera que plus ce diamètre d est important, plus le noyau tubulaire obtenu peut réaliser une découpe d'une protection réactive sans l'initier. En effet, pour un diamètre d'alésage du noyau important, il n'y a pas de recombinaison des ondes de choc au niveau de l'explosif d'une protection réactive impactée.The insert 7 will have a diameter d which will be chosen according to the desired diameter for the internal bore of the tubular core. It will be noted that the greater this diameter d is, the more the tubular core obtained can realize a cut reactive protection without initiating it. Indeed, for a large bore diameter of the core, there is no recombination shock waves at the level of the explosive impacted reactive protection.

Suivant ce premier mode de réalisation de l'invention, l'insert 7 est complètement cylindrique. Il est bien entendu possible de donner à l'insert un profil différent, par exemple légèrement conique.According to this first embodiment of the invention, the insert 7 is completely cylindrical. It is of course possible to give the insert a different profile, for example slightly conical.

La figure 2 montre une tête militaire 1 selon un deuxième mode de réalisation de l'invention.The figure 2 shows a military head 1 according to a second embodiment of the invention.

Ce mode diffère du précédent en ce que l'insert 7 comporte une partie arrière 11 qui est conique et qui se place dans un logement 12 conique complémentaire qui est usiné dans le chargement explosif 3. Ici, seule la partie arrière conique 11 de l'insert pénètre dans le chargement explosif 3, la partie cylindrique de l'insert est guidée par l'alésage axial du revêtement 2.This mode differs from the previous one in that the insert 7 has a rear portion 11 which is conical and which is placed in a complementary conical housing 12 which is machined in the explosive charge 3. Here, only the conical rear portion 11 of the insert enters the explosive charge 3, the cylindrical portion of the insert is guided by the axial bore of the coating 2.

L'insert 7 est là encore collé au chargement explosif 3.The insert 7 is again glued to the explosive charge 3.

La pointe arrière du cône 11 se situe à une distance D du fond 4a de l'enveloppe 4 (et également à distance des moyens d'amorçage 5, 6).The rear tip of the cone 11 is at a distance D from the bottom 4a of the casing 4 (and also at a distance from the priming means 5, 6).

La tête militaire 1 incorpore également un bloc de confinement arrière 13 qui comporte une surface externe cylindrique ajustée au logement interne de l'enveloppe 4 et qui présente un alésage interne conique 14.The military head 1 also incorporates a rear containment block 13 which has a cylindrical outer surface fitted to the inner housing of the casing 4 and which has a conical inner bore 14.

Ce bloc de confinement 13 est réalisé par exemple en un alliage léger (par exemple un alliage d'aluminium) ou bien en matière plastique. Le bloc 13 permet de guider l'onde de détonation dans le chargement explosif 3 lors de l'initiation de ce dernier.This containment block 13 is made for example of a light alloy (for example an aluminum alloy) or plastic. Block 13 guides the detonation wave in the explosive charge 3 during the initiation of the latter.

Par ailleurs, la conicité de l'alésage 14 est sensiblement la même que celle de la partie arrière 11 de l'insert 7.Moreover, the taper of the bore 14 is substantially the same as that of the rear portion 11 of the insert 7.

Dans ce mode de réalisation, la partie arrière 11 de l'insert joue le rôle de conformateur pour l'onde de détonation. Ce mode de réalisation permet donc d'assurer à la fois un bon maintien de l'insert et une bonne initiation de la charge.In this embodiment, the rear portion 11 of the insert acts as a shaper for the detonation wave. This embodiment therefore ensures both a good maintenance of the insert and a good initiation of the load.

Il devient ainsi possible de former d'une façon fiable et reproductible des noyaux tubulaires stables ayant un diamètre interne important et une longueur relativement réduite.It thus becomes possible to form reliably and reproducibly stable tubular cores having a large internal diameter and a relatively short length.

Comme cela a été précisé précédemment, les noyaux tubulaires ayant un diamètre interne important sont particulièrement intéressants car ils peuvent découper une protection réactive sans l'initier.As has been mentioned above, the tubular cores having a large internal diameter are particularly interesting because they can cut a reactive protection without initiating it.

On obtient un diamètre important pour l'alésage du noyau en augmentant le diamètre de l'insert, mais il se pose alors le problème de l'amorçabilité du chargement explosif de la tête militaire elle-même.A large diameter is obtained for the boring of the core by increasing the diameter of the insert, but there is then the problem of the bootability of the explosive charge of the warhead itself.

Ce mode de réalisation de l'invention permet donc d'assurer l'amorçabilité de la tête militaire incorporant un insert de diamètre important.This embodiment of the invention therefore makes it possible to ensure the primability of the military head incorporating an insert of large diameter.

Il est ainsi possible de mettre en place un insert ayant un diamètre d deux fois plus important que celui de l'insert du mode de réalisation selon la figure 1. On pourra mettre en oeuvre un insert ayant un diamètre pratiquement égal à 0,5 fois le calibre C de la charge.It is thus possible to set up an insert having a diameter d that is twice as large as that of the insert of the embodiment according to the figure 1 . It will be possible to implement an insert having a diameter substantially equal to 0.5 times the caliber C of the load.

Claims (8)

  1. Shaped charge warhead (1) incorporating a concave liner (2) pressed against an explosive load (3), arranged in a casing (4) incorporating a bottom (4a), associated with priming means (5, 6), such warhead comprising at least one insert (7) arranged axially with respect to the liner (2), such insert being intended to give a tubular profile to the slug generated by the liner (2) during the initiation of the explosive load, warhead wherein the insert (7) passes right through the liner (2) and penetrates inside the explosive load (3), the insert incorporating a rear part (10, 11) located at a distance from the bottom (4a) of the casing.
  2. Warhead according to Claim 1, wherein the rear part of the insert (7) is at a distance (D) from the bottom of the casing (4) that is greater than or equal to the diameter of the insert.
  3. Warhead according to one of Claims 1 or 2, wherein the length of the insert (7) located to the exterior of the charge (1) is greater than or equal to 0.5 times the calibre (C) of the charge.
  4. Warhead according to one of Claims 1 to 3, wherein the insert is completely cylindrical.
  5. Warhead according to one of Claims 1 to 3, wherein the insert (7) incorporates a conical rear part (11)
  6. Warhead according to Claim 5, wherein only the conical rear part (11) of the insert (7) penetrates into the explosive load (3).
  7. Warhead according to one of Claims 5 or 6, wherein it also incorporates a rear confinement unit (13) that incorporates a cylindrical external surface to fit the internal housing of the casing (4) and has a conical internal borehole (14) tapered substantially to match the tapering of the rear part (11) of the insert (7).
  8. Warhead according to one of Claims 1 to 7, wherein the insert (7) is made of steel.
EP07290750A 2006-06-22 2007-06-18 Warhead generating an explosively formed tubular projectile Active EP1870640B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0605739A FR2902869B1 (en) 2006-06-22 2006-06-22 MILITARY HEAD GENERATING A TUBULAR CORE.

Publications (3)

Publication Number Publication Date
EP1870640A2 EP1870640A2 (en) 2007-12-26
EP1870640A3 EP1870640A3 (en) 2008-08-27
EP1870640B1 true EP1870640B1 (en) 2011-02-23

Family

ID=37672433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07290750A Active EP1870640B1 (en) 2006-06-22 2007-06-18 Warhead generating an explosively formed tubular projectile

Country Status (5)

Country Link
EP (1) EP1870640B1 (en)
AT (1) ATE499582T1 (en)
DE (1) DE602007012615D1 (en)
ES (1) ES2361685T3 (en)
FR (1) FR2902869B1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948181A (en) * 1973-05-14 1976-04-06 Chamberlain Manufacturing Corporation Shaped charge
CH654104A5 (en) * 1983-10-04 1986-01-31 Brind Anstalt Ind HYBRID EXPLOSIVE ASSEMBLY.
DE3345529C1 (en) * 1983-12-16 1999-09-02 Diehl Stiftung & Co Target-searching ammunition with a sensor transducer arranged in front of its battle charge insert
US4841864A (en) 1988-02-09 1989-06-27 The United States Of America As Represented By The Secretary Of The Army Controlled explosively formed penetrator
FR2627580B1 (en) 1988-02-18 1993-02-19 France Etat Armement PROCESS FOR OBTAINING A CORE COMPRISING STABILIZING FINS AND APPLIED MILITARY LOAD
FR2698163B1 (en) * 1992-09-15 1995-02-24 Giat Ind Sa Perforation projectile and ammunition equipped with such a projectile.
US5753850A (en) * 1996-07-01 1998-05-19 Western Atlas International, Inc. Shaped charge for creating large perforations

Also Published As

Publication number Publication date
ATE499582T1 (en) 2011-03-15
FR2902869A1 (en) 2007-12-28
ES2361685T3 (en) 2011-06-21
FR2902869B1 (en) 2010-09-10
DE602007012615D1 (en) 2011-04-07
EP1870640A3 (en) 2008-08-27
EP1870640A2 (en) 2007-12-26

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