EP0857938B1 - Charge génératrice de noyau comportant des moyens de liaison du revêtement et de l'enveloppe - Google Patents
Charge génératrice de noyau comportant des moyens de liaison du revêtement et de l'enveloppe Download PDFInfo
- Publication number
- EP0857938B1 EP0857938B1 EP98400084A EP98400084A EP0857938B1 EP 0857938 B1 EP0857938 B1 EP 0857938B1 EP 98400084 A EP98400084 A EP 98400084A EP 98400084 A EP98400084 A EP 98400084A EP 0857938 B1 EP0857938 B1 EP 0857938B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- charge
- rear plate
- casing
- cylindrical surface
- attachment means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- 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
- F42B1/028—Shaped or hollow charges characterised by the form of the liner
-
- 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
- F42B1/036—Manufacturing processes therefor
Definitions
- the technical field of the invention is that of fillers nucleus generators.
- These charges generally include a charge explosive placed in an envelope and a coating having overall the shape of a spherical cap.
- the coating When the explosive detonates, the coating is set in motion by the incident pressure wave. It is deforms by turning "in a glove", that is to say that it turns into a projectile (or nucleus) whose front part is formed by the axial area of the covering and the rear part is a skirt formed by the periphery of the coating.
- Patent FR2627580 describes such a charge.
- Patent US4922825 which serves as the basis for the preamble of the main claim, also describes a charge core generator whose coating consists of two overlapping plates.
- the coating material is a ductile material or a material for which the formation of nucleus is disturbed by the presence of local constraints on the coating.
- the core generating charges are subject, during the storage phases, thermal constraints which cause dilations with different amplitudes for the explosive charge and for the metal shell.
- the coating of the filler according to the invention is thus fixed in a simple and rigid way without resulting disruption of nucleus formation.
- the fixing means according to the invention allow also to control the formation of peripheral fins on the rear part of the core, which improves stability aerodynamics of this one.
- the subject of the invention is a charge formed nucleus generator with explosive charge placed in an envelope and to which is applied a coating intended to be set in motion by the detonation explosive, the coating comprising at least two plates, a back plate which is in contact with the explosive charge and at least one front tackle charge characterized in that the back plate is made integral of the envelope by connecting means arranged between a cylindrical peripheral surface of the back plate and a inner cylindrical surface of the casing, the front plate being made integral with the back plate by gluing.
- each connecting means will include a initiation of rupture and / or will delimit a zone of rupture on the back plate. Such a provision will facilitate the separation of the coating and the load envelope during nucleus formation.
- the charge will preferably comprise at least three means regularly distributed angularly around the load axis.
- each means of connection consists of a screw arranged radially by relative to the axis of the load, screw passing through the envelope load and one end of which enters a fitted accommodation on the outer cylindrical surface of the back plate.
- each means of connection consists of a ball placed in a bore radial of the envelope and which cooperates with an imprint arranged on the external cylindrical surface of the plate back.
- each means of connection is constituted by a cylindrical pin, or a piano wire, the axis of which is both perpendicular to the load axis and tangent to the cylindrical surface outer of the back plate, pin which cooperates with a first impression made on the cylindrical surface back plate external and with a second imprint produced on the internal cylindrical surface of the envelope.
- each means of connection consists of an elastic clip placed in a housing fitted on the periphery of the back plate, clip having a deformable spout which is intended to penetrate into a groove arranged on the internal cylindrical surface of the envelope so as to ensure the axial joining of the first plate and load envelope.
- the back plate will preferably be made in aluminum or aluminum alloy.
- a charge generating core 1 comprises in known manner a cylindrical envelope 2 inside which is placed an explosive charge 3 to which a metal coating 4.
- the explosive charge is intended to be initiated by ignition means of known type and not shown here.
- the coating 4 here comprises at least two plates, one back plate 5 and a front plate 7.
- the back plate 5 is in contact with the load explosive 3 and it is made integral with the envelope 2 by connecting means.
- the front plate 7 is made integral with the plate back by gluing.
- the connecting means are constituted here by four screws 6 regularly distributed angularly and which are housed in radial threads 9 arranged on the casing 2.
- Each screw has a conical end 6a which enters a additional conical housing 8 arranged on a surface cylindrical device of the back plate 5.
- the plates rear 5 and front 7 of the coating are deformed by the shock wave which is communicated by the explosive.
- the conical housings 8 weaken the rear plate which breaks at the level of the connection means.
- the connecting means 6 coatings do not disturb the formation of the nucleus generated by the front plate 7, no obstacle being placed in front of the covering.
- the back plate 5 also prevents the formation of gas leaks at the periphery of the front plate when its setting in speed. It then becomes possible to define a coating whose front plate has a very peripheral zone thin without gas leakage problems or coating attachment problems.
- the back plate 5 finally immobilizes the explosive charge 3 in relation to enclosure 2.
- the front plate 7 is only subject to its own inertial forces which are balanced by bonding the front plate to the plate back.
- metal back plate 5 for example in a light alloy such as an aluminum alloy.
- This backplate does not significantly participate in the target's perforation and the disturbances it receives at the level of its skirt, as a result of the presence of means of connection, do not affect the effectiveness of the charge.
- the front plate 7 is intended to generate the core which has a perforating efficiency, it will be achieved for example by iron or tantalum.
- connection means regularly distributed angularly to generate three fins on the core.
- Figure 2 thus shows an embodiment in which the connecting means consist of balls 10 in steel which are placed during the assembly of the load in radial bores 11 arranged on the envelope.
- the balls 10 cooperate with spherical impressions 12 carried by the external cylindrical surface of the plate rear 5, which is thus weakened by the presence of fingerprints.
- the balls thus constitute interposed obstacles between the back plate 5 of the covering and the casing 2 of load.
- Each ball is held axially in its bore by a threaded plug 13.
- Figures 3a and 3b show a third mode of embodiment in which the connecting means are constituted by three cylindrical pins 14 (or three sections of piano string).
- each pin is both perpendicular to the axis 15 of the load (in projection) and tangent to the external cylindrical surface of the back plate 5.
- Each pin 14 cooperates with a first imprint 17 arranged on the external cylindrical surface of the plate rear 5 (and which weakens it locally) and with a second impression 18 made on the cylindrical surface inner envelope 2.
- FIG. 4a shows a fourth embodiment in which the connecting means are constituted by three clips elastic bands 19, made for example of spring steel.
- Each clip has a spout 19a and a heel 19b which are connected by a flexible portion 19c.
- the spout 19a is intended to enter a groove 20 fitted on the internal cylindrical surface of the casing 2.
- Each clip 19 is positioned in a housing 21 fitted on the periphery of the back plate 5 (and which delimits thus a rupture zone on this plate).
- Each housing 21 has a clearance 22 which is intended to receive the beak of the clip 19 when the latter deforms when fitting the back plate in the bore of the casing 2.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Description
- la figure 1a représente schématiquement en coupe longitudinale partielle une charge génératrice de noyau selon un premier mode de réalisation de l'invention,
- la figure 1b est une vue de détail agrandie de cette même charge au niveau d'un des moyens de liaisons,
- la figure 2 est une vue de détail d'un moyen de liaison utilisé dans une charge génératrice de noyau selon un deuxième mode de réalisation de l'invention,
- la figure 3a est une vue de détail d'un moyen de liaison utilisé dans une charge génératrice de noyau selon un troisième mode de réalisation de l'invention,
- la figure 3b est une vue en coupe de cette charge suivant le plan repéré AA sur la figure 3a,
- la figure 4a est une vue de détail d'un moyen de liaison utilisé dans une charge génératrice de noyau selon un quatrième mode de réalisation de l'invention,
- la figure 4b est une vue de la plaque arrière seule utilisée dans ce quatrième mode de réalisation,
- la figure 4c est une vue du moyen de liaison seul du clip qui est destiné à être associé à cette plaque arrière.
Claims (8)
- Charge formée (1) génératrice de noyau comportant un chargement explosif (3) disposé dans une enveloppe (2) et sur lequel est appliqué un revêtement (4) destiné à être mis en mouvement par la détonation de l'explosif, le revêtement comportant au moins deux plaques, une plaque arrière (5) qui est en contact avec le chargement explosif et au moins une plaque avant (7), charge caractérisée en ce que la plaque arrière est rendue solidaire de l'enveloppe (2) par des moyens de liaison (6,10,14,19) disposés entre une surface périphérique cylindrique de la plaque arrière (5) et une surface cylindrique interne de l'enveloppe (2), la plaque avant (7) étant rendue solidaire de la plaque arrière (5) par collage.
- Charge formée selon la revendication 1, caractérisée en ce que chaque moyen de liaison (6,10,14,19) comporte une amorce de rupture et/ou délimite une zone de rupture sur la plaque arrière (5).
- Charge formée selon une des revendications 1 ou 2, caractérisée en ce qu'elle comporte au moins trois moyens de liaison (6,10,14,19) régulièrement répartis angulairement autour de l'axe (15) de la charge.
- Charge formée selon la revendication 3, caractérisée en ce que chaque moyen de liaison est constitué par une vis (6) disposée radialement par rapport à l'axe de la charge, vis traversant l'enveloppe (2) de charge et dont une extrémité pénètre dans un logement (8) aménagé sur la surface cylindrique externe de la plaque arrière (5).
- Charge formée selon la revendication 3, caractérisée en ce que chaque moyen de liaison est constitué par une bille (10) placée dans un alésage radial (11) de l'enveloppe (2) et qui coopère avec une empreinte (12) aménagée sur la surface cylindrique externe de la plaque arrière (5).
- Charge formée selon la revendication 3, caractérisée en ce que chaque moyen de liaison est constitué par une goupille cylindrique (14), ou une corde à piano, dont l'axe est à la fois perpendiculaire à l'axe de la charge et tangent à la surface cylindrique externe de la plaque arrière (5), goupille qui coopère avec une première empreinte (17) aménagée sur la surface cylindrique externe de la plaque arrière (5) et avec une deuxième empreinte (18) réalisée sur la surface cylindrique interne de l'enveloppe.
- Charge formée selon la revendication 3, caractérisé en ce que chaque moyen de liaison est constitué par un clip élastique (19) placé dans un logement (21) aménagé sur la périphérie de la plaque arrière (5), clip comportant un bec déformable (19a) qui est destiné à pénétrer dans une gorge (20) aménagée sur la surface cylindrique interne . de l'enveloppe de façon à assurer la solidarisation axiale de la première plaque (5) et de l'enveloppe (2) de charge.
- Charge formée selon une des revendications 1 à 7, caractérisée en ce que la plaque arrière (5) est réalisée en aluminium ou alliage d'aluminium.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9701340 | 1997-02-06 | ||
FR9701340A FR2759158B1 (fr) | 1997-02-06 | 1997-02-06 | Charge generatrice de noyau comportant des moyens de liaison du revetement et de l'enveloppe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0857938A1 EP0857938A1 (fr) | 1998-08-12 |
EP0857938B1 true EP0857938B1 (fr) | 2002-07-03 |
Family
ID=9503387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98400084A Expired - Lifetime EP0857938B1 (fr) | 1997-02-06 | 1998-01-16 | Charge génératrice de noyau comportant des moyens de liaison du revêtement et de l'enveloppe |
Country Status (4)
Country | Link |
---|---|
US (1) | US6035785A (fr) |
EP (1) | EP0857938B1 (fr) |
DE (1) | DE69806279D1 (fr) |
FR (1) | FR2759158B1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2793314B1 (fr) * | 1996-04-02 | 2002-05-31 | Giat Ind Sa | Charge generatrice de noyau a performances ameliorees |
US6848608B2 (en) * | 2002-10-01 | 2005-02-01 | Cabot Corporation | Method of bonding sputtering target materials |
WO2004076706A2 (fr) * | 2003-02-25 | 2004-09-10 | Cabot Corporation | Procede de fabrication d'assemblages de cible de pulverisation et assemblages realises selon ce procede |
US7159657B2 (en) * | 2004-03-24 | 2007-01-09 | Schlumberger Technology Corporation | Shaped charge loading tube for perforating gun |
US6868791B1 (en) * | 2004-04-15 | 2005-03-22 | The United States Of America As Represented By The Secretary Of The Army | Single stage kinetic energy warhead utilizing a barrier-breaching projectile followed by a target-defeating explosively formed projectile |
FR2885213B1 (fr) | 2005-05-02 | 2010-11-05 | Giat Ind Sa | Procede de commande d'une munition ou sous-munition, systeme d'attaque, munition et designateur mettant en oeuvre un tel procede |
US7856928B1 (en) * | 2007-04-23 | 2010-12-28 | Lockheed Martin Corporation | Countermine dart system and method |
FR3068456B1 (fr) * | 2017-06-28 | 2019-07-19 | Nexter Munitions | Charge formee |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3025794A (en) * | 1957-05-15 | 1962-03-20 | Schlumberger Well Surv Corp | Perforating apparatus |
US4080898A (en) * | 1976-02-05 | 1978-03-28 | Gieske Harry A | Spiral wrapped shaped charge liners and munition utilizing same |
US4747350A (en) * | 1984-06-18 | 1988-05-31 | Alexander Szecket | Hollow charge |
NO862508L (no) * | 1985-12-12 | 1987-06-15 | Israel Defence | Bombe med formet eller hul ladning. |
DE3608198A1 (de) * | 1986-03-12 | 1987-09-17 | Rheinmetall Gmbh | Sprengladung mit einer projektilbildenden einlage |
FR2632394B1 (fr) * | 1986-07-24 | 1990-11-30 | France Etat Armement | Charge explosive generatrice de noyau |
DE3628622C1 (de) * | 1986-08-22 | 1996-08-08 | Fraunhofer Ges Forschung | Vorrichtung zur Erzeugung sprenggeformter Projektile |
FR2627580B1 (fr) | 1988-02-18 | 1993-02-19 | France Etat Armement | Procede permettant d'obtenir un noyau comportant des ailettes stabilisatrices et charge militaire faisant application |
FR2655719B1 (fr) * | 1989-12-07 | 1994-05-06 | Etat Francais Delegue Armement | Charge explosive engendrant plusieurs noyaux et/ou jets. |
DE3941245A1 (de) * | 1989-12-14 | 1991-06-20 | Rheinmetall Gmbh | Gefechtskopf |
FR2740212B1 (fr) * | 1995-10-20 | 1997-12-05 | Giat Ind Sa | Charge explosive generatrice de noyau |
-
1997
- 1997-02-06 FR FR9701340A patent/FR2759158B1/fr not_active Expired - Lifetime
-
1998
- 1998-01-16 DE DE69806279T patent/DE69806279D1/de not_active Expired - Lifetime
- 1998-01-16 EP EP98400084A patent/EP0857938B1/fr not_active Expired - Lifetime
- 1998-01-30 US US09/015,945 patent/US6035785A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6035785A (en) | 2000-03-14 |
FR2759158A1 (fr) | 1998-08-07 |
EP0857938A1 (fr) | 1998-08-12 |
DE69806279D1 (de) | 2002-08-08 |
FR2759158B1 (fr) | 1999-02-26 |
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