FR2617955A1 - Explosive projectile with a prefragmented casing of increased effectiveness, and method of production - Google Patents

Explosive projectile with a prefragmented casing of increased effectiveness, and method of production Download PDF

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Publication number
FR2617955A1
FR2617955A1 FR8709691A FR8709691A FR2617955A1 FR 2617955 A1 FR2617955 A1 FR 2617955A1 FR 8709691 A FR8709691 A FR 8709691A FR 8709691 A FR8709691 A FR 8709691A FR 2617955 A1 FR2617955 A1 FR 2617955A1
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France
Prior art keywords
explosive
sheath
rings
explosive projectile
projectile according
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Granted
Application number
FR8709691A
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French (fr)
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FR2617955B1 (en
Inventor
Alain Rochelet
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ALSETEX
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ALSETEX
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Priority to FR8709691A priority Critical patent/FR2617955B1/en
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Publication of FR2617955B1 publication Critical patent/FR2617955B1/en
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Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0838—Primers or igniters for the initiation or the explosive charge in a warhead
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • F42B12/28—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction the projectile wall being built from annular elements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

The invention relates to an explosive projectile with a prefragmented casing of increased effectiveness and its method of production. This projectile includes a thin metal sheath 3, in very close adherent contact with the internal face of the prefragmented rings 1 constituting the casing of the projectile. The fuse relay 5 of the explosive charge 4 intended to give rise to the detonation of this load is located in the axis and approximately midway along the explosive charge.

Description

Projectile explosif à enveloppe préfragmentée
d'efficacité accrue et procédé de réalisation.Explosive projectile with pre-fragmented envelope
increased efficiency and method of production.

La présente invention concerne les projectiles explosifs à enveloppe préfragmentée et en particulier un projectile explosif à enveloppe du type comprenant des anneaux métalliques préfragmentés, dtefficacité accrue. The present invention relates to explosive projectiles with a pre-fragmented casing and in particular an explosive projectile with a casing of the type comprising pre-fragmented metal rings, with increased efficiency.

On connaît les projectiles explosifs à enveloppes à anneaux métalliques superposés préfragmentés sur leur périphérie. Cependant, on constate que le confinement de la charge explosive de ces projectiles explosifs est rarement suffisant et qu'il provoque l'affaiblissement et même parfois l'arrêt de la détonation propre à faire exploser ledit projectile. Explosive projectiles with envelopes with superimposed metal rings pre-fragmented on their periphery are known. However, it can be seen that confining the explosive charge of these explosive projectiles is rarely sufficient and that it weakens and even sometimes stops the detonation capable of detonating said projectile.

L'invention vise à remédier à cet inconvénient en améliorant le confinement de la charge explosive de ces projectiles, pour éviter notamment ces arrêts de détonation. The invention aims to remedy this drawback by improving the confinement of the explosive charge of these projectiles, in particular to avoid these detonation stops.

L'invention vise également à améliorer la répartition des éclats lors de l'explosion en ouvrant au maximum la gerbe d'éclats de telle sorte que la probabilité d'atteinte d'une cible donnée placée aléatoirement autour du point d'éclatement soit plus grande. The invention also aims to improve the distribution of the fragments during the explosion by opening the sheaf of fragments as much as possible so that the probability of hitting a given target placed randomly around the burst point is greater. .

L'invention a en effet pour objet un projectile explosif à enveloppe du type comprenant des anneaux métalliques superposés préfragmentés, caractérisé en ce qu'unie vue d'augmenter l'efficacité de son explosion, il comprend
- une gaine métallique de faible épaisseur, en contact adhérent très serré avec la face interne des anneaux et
- un relais d'amorcage de la charge explosive destiné à provoquer la détonation de cette charge, situé dans l'axe de l'enveloppe proche de la mi-longueur, à l'intérieur de la charge explosive principale.The subject of the invention is in fact an explosive projectile with a casing of the type comprising superimposed pre-fragmented metal rings, characterized in that, seen to increase the efficiency of its explosion, it comprises
- a thin metal sheath, in very close adherent contact with the internal face of the rings and
- an explosive charge initiation relay intended to cause the detonation of this charge, located in the axis of the envelope close to mid-length, inside the main explosive charge.

Le positionnement du relais d'amorçage de la charge principale dans l'axe, et à mi-longueur environ de la charge enfermée permet de répartir l'onde de détonation en amont et en aval du comprimé d'amorcage et contribue à ouvrir leangle de la gerbe d'éclats à lexplosion.  The positioning of the priming relay of the main charge in the axis, and at about half the length of the enclosed charge allows to distribute the detonation wave upstream and downstream of the priming tablet and contributes to open the angle of the sheaf of explosions.

Le plaquage de la gaine sur la face interne des anneaux est réalisé de préférence par compression isostatique, hydraulique ou pneumatique, réalisée à l'intérieur de cette gaine. The plating of the sheath on the internal face of the rings is preferably carried out by isostatic, hydraulic or pneumatic compression, carried out inside this sheath.

Pour améliorer la vitesse des éclats, on peut revêtir lgensemble des anneaux d'une seconde gaine, de préférence métallique, plaquée très fermement sur la périphérie externe des anneaux. Cette seconde gaine peut encore être la membrane en revêtement externe de l'enveloppe du projectile explosif. To improve the speed of the flakes, one can coat all the rings with a second sheath, preferably metallic, pressed very firmly on the outer periphery of the rings. This second sheath can also be the membrane with an external coating of the envelope of the explosive projectile.

Le plaquage de cette gaine sur les anneaux est réalisé de préférence par compression hydraulique iso statique circonférentielle.  The plating of this sheath on the rings is preferably carried out by circumferential iso static hydraulic compression.

Un exemple de réalisation d'un projectile explosif selon I'invention est décrit ci-dessous, à titre non limitatif et en référence au dessin annexé, sur lequel:
- La figure unique est une vue en coupe partielle d'une enveloppe de projectile explosif selon l'invention.An exemplary embodiment of an explosive projectile according to the invention is described below, without implied limitation and with reference to the appended drawing, in which:
- The single figure is a partial sectional view of an explosive projectile envelope according to the invention.

Comme représenté sur cette figure, l'enveloppe du projectile explosif selon l'invention comprend un ensemble d'anneaux métalliques préfragmentés 1, à savoir dentelés à leur périphérie avec point faible de rupture entre chaque dent. Ces anneaux sont superposés coaxialement er forment la structure principale de l'enveloppe. As shown in this figure, the envelope of the explosive projectile according to the invention comprises a set of pre-fragmented metal rings 1, namely serrated at their periphery with weak point of rupture between each tooth. These rings are superposed coaxially and form the main structure of the envelope.

Une membrane métallique externe 2, de faible épaisseur et de résistance définie,revêt extérieurement lesdits anneaux 1. Cette membrane est plaquée très fermement à la surface de circonférence externe des anneaux, par exemple,par compression hydraulique isosta tique circonférentielle. An external metallic membrane 2, of small thickness and of defined resistance, externally coats said rings 1. This membrane is pressed very firmly to the surface of the outer circumference of the rings, for example, by isostatic circumferential hydraulic compression.

Une gaine interne métallique 3 de faible épaisseur revêt ltalésage interne de l'ensemble des anneaux 1. A thin metal internal sheath 3 covers the internal bore of all of the rings 1.

Le contact intime de la gaine 3 sur cet alésage est réalisé par expansion de la gaine au moyen d'une compression isostatique, hydraulique ou pneumatique à l'intérieur de cette gaine.The intimate contact of the sheath 3 on this bore is produced by expansion of the sheath by means of isostatic, hydraulic or pneumatic compression inside this sheath.

La membrane externe 2 et la gaine interne 3 contribuent conjointement à la parfaite cohésion des anneaux 1, l'un par rapport à l'autre, et apportent à l'enveloppe ainsi formée une certaine rigidité, propice à la propagation de la détonation. The outer membrane 2 and the inner sheath 3 jointly contribute to the perfect cohesion of the rings 1, one with respect to the other, and provide the envelope thus formed with a certain rigidity, conducive to the propagation of the detonation.

Dans la charge 4 est ménagé le relais 5 d'amorçage de la détonation, lequel est relié au détonateur 6 par un canal 7. Le relais 5 dtamorçage de la charge explosive est situé sensiblement au milieu de la charge explosive 4. In charge 4 is provided the relay 5 for initiating the detonation, which is connected to the detonator 6 by a channel 7. The relay 5 for initiating the explosive charge is located substantially in the middle of the explosive charge 4.

A l'initiation du détonateur 6, l'onde de détonation est transmise à travers le canal 7 au relais 5 d'amorçage, puis à la charge explosive 4 vers l'amont et ltaval de cette dernière. L'onde de détonation est ainsi quasi isotrope et l'angle dtouerture de la gerbe d'éclats résultante en conséquence est élargi.At the initiation of the detonator 6, the detonation wave is transmitted through the channel 7 to the ignition relay 5, then to the explosive charge 4 upstream and downstream of the latter. The detonation wave is thus almost isotropic and the angle of opening of the resulting burst of shrapnel is consequently widened.

La présente invention apporte ainsi un projectile explosif très vulnérant, sur et de grande efficacité.  The present invention thus provides a highly offensive, high-explosive explosive projectile.

Claims (7)

REVENDICATIONS 1.- Projectile explosif à enveloppe du type comprenant des anneaux métalliques (1) superposés préfragmentés sur leur périphérie, caractérisé en ce qulen vue d'augmenter l'efficacité de son explosion, il comprend: 1.- Explosive projectile with envelope of the type comprising metal rings (1) superimposed prefragmented on their periphery, characterized in that in order to increase the efficiency of its explosion, it comprises: - une gaine métallique (3) de faible épaisseur, en contact adhérent très serré avec la face interne des anneaux (1) et - a thin metal sheath (3), in very close adhesive contact with the internal face of the rings (1) and r un relais (5) d'amorçage de la charge explosive destiné à provoquer la détonation de cette charge, situé dans l'axe et à environ mi-longueur de la charge explosive (4) enfermée. r a relay (5) for initiating the explosive charge intended to cause the detonation of this charge, located in the axis and approximately half-length of the enclosed explosive charge (4). 2.- Projectile explosif selon la revendication 1, caractérisé en ce que le relais d'amorçage (5) est relié par un canal (7) à un détonateur (6), situé ?' une extrémité de la charge explosive (4) ou de l'enveloppe. 2. Explosive projectile according to claim 1, characterized in that the ignition relay (5) is connected by a channel (7) to a detonator (6), located? ' one end of the explosive charge (4) or of the casing. 3.- Projectile explosif selon ltune des revendications 1 et 2, caractérisé en ce que ltensemble des anneaux (1) est revêtu d'une seconde gaine (2), de faible épaisseur et de résistance définie, cette'gaine étant plaquée très fermement sur la périphérie des anneaux (1). 3. Explosive projectile according to claims 1 and 2, characterized in that the set of rings (1) is coated with a second sheath (2), of small thickness and of defined resistance, this sheath being pressed very firmly on the periphery of the rings (1). 4.- Procédé de réalisation d'un projectile explosif selon l'une des revendications 1 et 2, caractérisé en ce qu'il consiste à plaquer la gaine (3) sur la face interne des anneaux (1), ce plaquage étant réalisé par compression isostatique créée à l'intérieur de la gaine. 4.- A method of producing an explosive projectile according to one of claims 1 and 2, characterized in that it consists in pressing the sheath (3) on the internal face of the rings (1), this plating being produced by isostatic compression created inside the sheath. 5.- Procédé de réalisation d'un projectile explosif selon la revendication 4, caractérisé en ce que ladite compression est, par exemple, hydraulique ou pneumatique. 5.- A method of producing an explosive projectile according to claim 4, characterized in that said compression is, for example, hydraulic or pneumatic. 6.- Procédé de réalisation d'un projectile explosif selon l'une des revendications précédentes, caractérise en ce qu'il consiste à plaquer la seconde gaine (2) sur la périphérie externe des anneaux, ce plaquage étant réalisé par compression isostatique circonférentielle sur ladite gaine. 6.- Method for producing an explosive projectile according to one of the preceding claims, characterized in that it consists in pressing the second sheath (2) on the external periphery of the rings, this pressing being carried out by circumferential isostatic compression on said sheath. 7.- Procédé de réalisation d'un projectile explosif selon la revendication 6, caractérisé en ce que ladite compression est par exemple hydraulique.  7.- A method of producing an explosive projectile according to claim 6, characterized in that said compression is for example hydraulic.
FR8709691A 1987-07-08 1987-07-08 EXPLOSIVE PROJECTILE WITH PREFRAGMENTED ENVELOPE OF INCREASED EFFICIENCY AND METHOD FOR THE PRODUCTION THEREOF Expired - Fee Related FR2617955B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8709691A FR2617955B1 (en) 1987-07-08 1987-07-08 EXPLOSIVE PROJECTILE WITH PREFRAGMENTED ENVELOPE OF INCREASED EFFICIENCY AND METHOD FOR THE PRODUCTION THEREOF

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Application Number Priority Date Filing Date Title
FR8709691A FR2617955B1 (en) 1987-07-08 1987-07-08 EXPLOSIVE PROJECTILE WITH PREFRAGMENTED ENVELOPE OF INCREASED EFFICIENCY AND METHOD FOR THE PRODUCTION THEREOF

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FR2617955A1 true FR2617955A1 (en) 1989-01-13
FR2617955B1 FR2617955B1 (en) 1993-11-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0918206A3 (en) * 1997-11-21 1999-12-15 Diehl Stiftung & Co. Fragmentation casing for ammunition
WO2018108308A1 (en) * 2016-12-16 2018-06-21 Diehl Defence Gmbh & Co. Kg Munition module, warhead, and munition

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458576A (en) * 1943-10-04 1949-01-11 Nicholas L Etten Fragmentation bomb
DE2231698A1 (en) * 1971-07-08 1973-01-18 Oerlikon Buehrle Ag FLOOR WITH SPHERICAL PROJECTILES, PROCESS FOR THE PRODUCTION THEREOF AND DEVICE FOR CARRYING OUT THE PROCESS
US3977327A (en) * 1973-06-25 1976-08-31 United States Of America As Represented By The Secretary Of The Army Controlled fragmentation warhead
FR2312009A1 (en) * 1975-05-23 1976-12-17 Thomson Brandt Fragmentation explosive charge casing - has sidewalls formed by coil of notched wire and internal shell
FR2536850A1 (en) * 1982-11-26 1984-06-01 Luchaire Sa Detonation of explosive charge esp. in anti-personnel mine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458576A (en) * 1943-10-04 1949-01-11 Nicholas L Etten Fragmentation bomb
DE2231698A1 (en) * 1971-07-08 1973-01-18 Oerlikon Buehrle Ag FLOOR WITH SPHERICAL PROJECTILES, PROCESS FOR THE PRODUCTION THEREOF AND DEVICE FOR CARRYING OUT THE PROCESS
US3977327A (en) * 1973-06-25 1976-08-31 United States Of America As Represented By The Secretary Of The Army Controlled fragmentation warhead
FR2312009A1 (en) * 1975-05-23 1976-12-17 Thomson Brandt Fragmentation explosive charge casing - has sidewalls formed by coil of notched wire and internal shell
FR2536850A1 (en) * 1982-11-26 1984-06-01 Luchaire Sa Detonation of explosive charge esp. in anti-personnel mine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0918206A3 (en) * 1997-11-21 1999-12-15 Diehl Stiftung & Co. Fragmentation casing for ammunition
WO2018108308A1 (en) * 2016-12-16 2018-06-21 Diehl Defence Gmbh & Co. Kg Munition module, warhead, and munition
US10845176B2 (en) 2016-12-16 2020-11-24 Diehl Defence Gmbh & Co. Kg Munition module, warhead and munition

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Publication number Publication date
FR2617955B1 (en) 1993-11-26

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