EP0769672B1 - Projektilbildende explosive Ladung - Google Patents

Projektilbildende explosive Ladung Download PDF

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Publication number
EP0769672B1
EP0769672B1 EP96401984A EP96401984A EP0769672B1 EP 0769672 B1 EP0769672 B1 EP 0769672B1 EP 96401984 A EP96401984 A EP 96401984A EP 96401984 A EP96401984 A EP 96401984A EP 0769672 B1 EP0769672 B1 EP 0769672B1
Authority
EP
European Patent Office
Prior art keywords
plate
liner
coating
explosive
charge
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
Application number
EP96401984A
Other languages
English (en)
French (fr)
Other versions
EP0769672A1 (de
Inventor
Jean-Luc Renaud-Bezot
Bernard Ceyrat
Laurent Chauveau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giat Industries SA
Original Assignee
Giat Industries SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP0769672A1 publication Critical patent/EP0769672A1/de
Application granted granted Critical
Publication of EP0769672B1 publication Critical patent/EP0769672B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F42B1/032—Shaped or hollow charges characterised by the material of the liner

Definitions

  • the technical field of the invention is that of fillers nucleus generators.
  • Core generating charges generally include an explosive charge placed in an envelope and on which is applied a coating having the overall 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 generating charge of nucleus.
  • the mass of the peripheral part of the coating may become too weak which leads a folding of the skirt towards the front of the core, decreasing thus its stability.
  • Patent US5155296 which serves as the basis for the preamble of the claim 1, describes a charge generating the nucleus with tungsten coating.
  • This charge comprises a layer or plate of thermal insulating material disposed between the coating and explosive charge.
  • a resistance heating makes the tungsten ductile and the plate of insulation prevents detonation of the explosive as following this warm-up.
  • Such a load structure does not not prevent a folding of the core skirt towards the front.
  • the invention proposes a charge generating a nucleus which generates a core with improved aerodynamic stability.
  • Stability is improved thanks to the presence of means which ensure that the skirt generated by the deformation of the peripheral part of the covering does not fold towards the front of the core, even if the thickness of this part device is very weak.
  • the subject of the invention is a charge generating nucleus with an explosive charge placed in a envelope and coating intended to be set in motion by the detonation of the explosive, a coating whose thickness decreases between a central part and its periphery in contact with the envelope, load comprising a plate placed between explosive charge and coating, plate having a diameter equal to the internal diameter of the envelope and which is in contact with the coating at least in part thinned periphery thereof, charge characterized in that that the plate material has a lower density or equal to that of the coating material and a pressure Hugoniot limit greater than or equal to 0.1 GPa, such so that it decreases the speed communicated to the party coating device by the explosive charge during his initiation.
  • the total mass of the plate will preferably be lower than that of the coating.
  • the mass of the plate could thus be between 2% and 15% of the mass of the coating.
  • the plate may have an annular shape.
  • the plate will advantageously have a thickness which decreases regularly from its external diameter to its axial part.
  • tantalum coating we can make the tantalum coating and choose then the material of the plate among the following materials: Aluminum, Iron, steel, copper, Molybdenum.
  • a load 1 according to the invention comprises an explosive charge 2 placed in an envelope 3 and a coating 4 intended to be put in movement by detonation of explosive 2.
  • the load 1 also includes priming means 5 of known type, constituted for example by a primer 5a and an explosive relay 5b.
  • the thickness of the coating 4 decreases between a part central 4a and a peripheral part 4b in contact with envelope 3.
  • the load 1 comprises a plate 6 which is placed between the explosive charge 2 and the coating 4.
  • the plate 6 has a diameter equal to the internal diameter of the envelope 2 and it is in contact with the coating 4.
  • the covering 4 is fixed to the plate 6, for example by collage.
  • the material of the plate 6 will be chosen as it decreases the speed communicated by the explosive charge 2 to coating 4 during initiation.
  • FIG. 1b represents a core 7 generated by a coating of a filler according to the prior art.
  • the core has a rear skirt 8 which is folded on the body of the core 7, thereby reducing the length and aerodynamic stability thereof.
  • Figure 1a shows a core 7 generated by the charge 1 according to the invention.
  • the decrease in the speed of projection which is provided by the plate 6 allows slow down the deformation of the peripheral part 4b of the coating, thus ensuring the formation of a skirt 8 no folded over the core 7.
  • the plate 6 is dissociates from the coating 4 which continues on its own path.
  • the shock wave is therefore transmitted to the coating practically without damping. Only the local speed of the coating is slightly reduced at the level of its periphery 4b due to the sharing at this level of amounts of movement between the plate and the coating.
  • the plate will be given a mass between 2% and 15% of the mass of the coating.
  • the plate will generally have a thickness which decreases regularly from its external diameter to its axial part.
  • the decrease in speed must be maximum at the periphery 4b of the coating and be almost zero at the central part 4a.
  • the coating is made of tantalum
  • Figure 2 shows an alternative embodiment of the invention in which the plate 6 has a shape annular.
  • a core-generating charge comprising an annular plate aluminum applied on a tantalum coating.
  • the thickness of the plate being of the order of 1 mm in periphery while that of the facing facing is 2 mm.

Claims (6)

  1. Kernmantelladung (1), die eine Sprengladung (2) in einer Hülse (3) und einen Mantel (4) enthält, der durch die Zündung des Sprengstoffs in Bewegung gesetzt wird und dessen Stärke von seinem mittleren Teil (4a) zu seinem äußeren, mit der Hülse (3) in Kontakt stehenden Rand (4b), abnimmt, eine Ladung mit einem Plättchen (6), das zwischen der Sprengladung (2) und dem Mantel (4) eingebracht ist, und einem Durchmesser, der mit dem inneren Durchmesser der Hülse (3) identisch ist und sich mit dem Mantel (4) zumindest auf Höhe seines äußeren verschlankten Rands (4b) in Kontakt befindet, eine Ladung, dadurch gekennzeichnet, daß das Material des Plättchens eine geringere oder gleiche Dichte wie das Material des Mantels und einen nach Hugoniot zulässigen Höchstdruck höher oder gleich 0,1 Gpa aufweist, so daß er die durch die Sprengladung bei deren Zündung auf den äußeren Rand des Mantels übermittelte Geschwindigkeit vermindert.
  2. Kernmantelladung nach Anspruch 1, dadurch gekennzeichnet, daß die gesamte Masse des Plättchens (6) kleiner als die des Mantels (4) ist.
  3. Kernmantelladung nach Anspruch 2, dadurch gekennzeichnet, daß die Masse des Plättchens (6) zwischen 2 und 15% der Masse des Mantels (4) beträgt.
  4. Kernmantelladung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Plättchen (6) ringförmig ist.
  5. Kernmantelladung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Plättchen (6) eine Stärke hat, die gleichmäßig von seinem äußeren Durchmesser zum Axialteil hin abnimmt.
  6. Kernmantelladung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Mantel (4) aus Tantal herstellt und das Material des Plättchens (6) aus den Materialien Aluminium, Eisen, Stahl, Kupfer, Molybdän ausgewählt wird.
EP96401984A 1995-10-20 1996-09-19 Projektilbildende explosive Ladung Expired - Lifetime EP0769672B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512337A FR2740212B1 (fr) 1995-10-20 1995-10-20 Charge explosive generatrice de noyau
FR9512337 1995-10-20

Publications (2)

Publication Number Publication Date
EP0769672A1 EP0769672A1 (de) 1997-04-23
EP0769672B1 true EP0769672B1 (de) 2001-01-10

Family

ID=9483735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401984A Expired - Lifetime EP0769672B1 (de) 1995-10-20 1996-09-19 Projektilbildende explosive Ladung

Country Status (4)

Country Link
US (1) US5744747A (de)
EP (1) EP0769672B1 (de)
DE (1) DE69611503T2 (de)
FR (1) FR2740212B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
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
FR2759158B1 (fr) * 1997-02-06 1999-02-26 Giat Ind Sa Charge generatrice de noyau comportant des moyens de liaison du revetement et de l'enveloppe
EP0955517A1 (de) * 1998-05-04 1999-11-10 SM Schweizerische Munitionsunternehmung AG Munitionskörper mit einem mehrstufigen Gefechtskopf
US6305289B1 (en) * 1998-09-30 2001-10-23 Western Atlas International, Inc. Shaped charge for large diameter perforations
FR2812384B1 (fr) 2000-07-26 2002-12-06 Giat Ind Sa Dispositif de neutralisation d'une charge utile
US20050115448A1 (en) * 2003-10-22 2005-06-02 Owen Oil Tools Lp Apparatus and method for penetrating oilbearing sandy formations, reducing skin damage and reducing hydrocarbon viscosity
US7078603B2 (en) * 2005-01-31 2006-07-18 Pioneer Hi-Bred International, Inc. Hybrid maize 32R38
GB0604408D0 (en) 2006-03-04 2006-07-12 Alford Res Ltd An explosive charge
EP1918507A1 (de) * 2006-10-31 2008-05-07 Services Pétroliers Schlumberger Hohlladung enthaltend eine Säure
CN103453803B (zh) * 2013-08-16 2016-03-16 中国工程物理研究院化工材料研究所 高效破石用聚能罩
DE102022003744A1 (de) 2022-10-12 2024-04-18 Diehl Defence Gmbh & Co. Kg Feinabstimmung eines explosiv geformten Projektils

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1137987B (de) * 1960-02-23 1962-10-11 Bofors Ab Hohlladung
US3188955A (en) * 1961-03-31 1965-06-15 Western Co Of North America Explosive charge assemblies
US3913488A (en) * 1973-09-17 1975-10-21 Us Army Ballistic disc
DE3144354C1 (de) * 1981-11-07 1991-01-03 Rheinmetall Gmbh Einlage fuer eine Sprengladung zum Bilden eines im wesentlichen stabfoermigen Projektils
FR2632394B1 (fr) * 1986-07-24 1990-11-30 France Etat Armement Charge explosive generatrice de noyau
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
DE3823823A1 (de) * 1988-07-14 1990-01-18 Diehl Gmbh & Co Gefechtskopf
DE3830347C2 (de) * 1988-09-07 1998-07-09 Rheinmetall Ind Ag Gefechtskopf
DE4001041A1 (de) * 1990-01-16 1991-07-18 Rheinmetall Gmbh Befestigungsring zur axialen fixierung einer projektilbildenden einlage
FR2681677B1 (fr) * 1991-09-20 1995-01-27 Thomson Brandt Armements Charge explosive avec revetement a proprietes mecaniques reparties.
US5155296A (en) * 1992-03-18 1992-10-13 The United States Of America As Represented By The Secretary Of The Army Thermally enhanced warhead
DE4213318C2 (de) * 1992-04-23 2000-04-13 Rheinmetall W & M Gmbh Verfahren zur Herstellen einer Ladungseinlage

Also Published As

Publication number Publication date
FR2740212B1 (fr) 1997-12-05
FR2740212A1 (fr) 1997-04-25
DE69611503T2 (de) 2001-04-26
US5744747A (en) 1998-04-28
DE69611503D1 (de) 2001-02-15
EP0769672A1 (de) 1997-04-23

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