EP0773424B1 - Hohlladungsgefechtskopf mit verbesserter Beschleunigungsfestigkeit - Google Patents

Hohlladungsgefechtskopf mit verbesserter Beschleunigungsfestigkeit Download PDF

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Publication number
EP0773424B1
EP0773424B1 EP19960402311 EP96402311A EP0773424B1 EP 0773424 B1 EP0773424 B1 EP 0773424B1 EP 19960402311 EP19960402311 EP 19960402311 EP 96402311 A EP96402311 A EP 96402311A EP 0773424 B1 EP0773424 B1 EP 0773424B1
Authority
EP
European Patent Office
Prior art keywords
support
coating
explosive charge
casing
explosively formed
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
EP19960402311
Other languages
English (en)
French (fr)
Other versions
EP0773424A1 (de
Inventor
Alain Kerdraon
Michel Vives
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 EP0773424A1 publication Critical patent/EP0773424A1/de
Application granted granted Critical
Publication of EP0773424B1 publication Critical patent/EP0773424B1/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

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.
  • nucleus-generating charge When a nucleus-generating charge is placed in a vector such as a shell, from which it is intended to be ejected on trajectory, it is subjected to efforts significant acceleration, both when firing the shell only when the charge is ejected from it.
  • the problem of the behavior of the coating acceleration is all the more complex as the load is in principle subject to a vector when firing a vector first acceleration, then it knows when ejecting of the charge outside the vector a second acceleration having an opposite direction to that of the first.
  • 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 at thermal constraints which cause dilations with different amplitudes for the explosive charge and for the metal shell.
  • the filler according to the invention thus has excellent resistance of coating and loading to constraints of acceleration undergone inside the vector without cause disturbances in the formation of the nucleus.
  • 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 charge, the coating being set up by a support having a cylindrical bearing adjusted to the internal diameter of the envelope, support rendered secured to the envelope by connecting means, load characterized in that the support is in contact with the explosive charge and thus ensures the axial maintenance of the explosive charge in relation to the enclosure.
  • the support can be annular or have a substantially conical surface in contact with the explosive charge.
  • the support may be a cup applied to the explosive charge and carrying a housing intended to receive the coating.
  • the material of the cup will preferably have a shock impedance lower than that of the coating.
  • the support is fixed to the envelope by connecting means which include a deformable washer disposed between the support and a support surface integral with the envelope.
  • the deformable washer may include tongues springs, regularly distributed angularly and which are arranged to allow deformation by washer compression.
  • the spring tabs may have a shape of arcs of circle concentric to the washer.
  • 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 is placed on an annular support 5 which has a cylindrical surface 5a having a diameter equal to the internal diameter of the envelope.
  • the diameter of the coating 4 is here less than the diameter of the bearing 5a therefore to that of the envelope 2.
  • the support 5 has a convex face 6 which is in contact with explosive charge 3 and it has a circular collar 7 which bears on the end of envelope 2.
  • the collar 7 is regularly pierced with holes angularly distributed and which allow it to be joined with the casing 2 by means of screws 8.
  • the coating 4 is therefore housed in a bore 5b of the support 5 and its rear face 4a is supported, on the one hand on explosive charge 3 (at a middle part of the coating), and on the other hand on a surface 9 of the support 5 (at the periphery of the coating).
  • This load is intended to be placed in a vector (not shown), such as an artillery cargo shell.
  • the load is then subjected to acceleration forces which have the effect of pushing the explosive charge 3 against the annular support 5.
  • the latter which is integral with the casing 2 thanks to the screws 8, ensures the axial maintenance of the loading 3, thereby reducing the stresses in the coating 4.
  • the coating is in fact subject only to its own inertial forces which can be balanced by bonding of the coating on the support 5 (at the level of the surface 9) and on loading 3.
  • the support 5 we will size the support 5 so that it ensures its axial holding function for the explosive charge.
  • the coating is deformed by the shock wave communicated to it by the explosive, either directly or through the support 5 which also makes it possible to modulate the impulse undergone by the coating.
  • the support 5 thus ensures axial maintenance of the load without an obstacle being placed in front of the covering. He ... not therefore does not disturb the formation of the nucleus.
  • the coating is supported at its periphery by the support, and it is possible to adjust the thickness of this last depending on the thickness of the coating and its deformation characteristics.
  • Figure 2 shows a second embodiment of the invention in which the annular support 5 is in contact with the explosive charge at a conical surface 10. This embodiment of the support is more rigid than the previous embodiment.
  • the coating is glued to the support 5 at a surface 9 and glued to load 3 and it is essentially subjected to its own inertial forces.
  • Figure 3 shows a third embodiment of the invention in which the support 5 is no longer annular but affects the shape of a cup applied to the explosive charge 3 and carrying a housing 11 intended for receive the coating 4.
  • the support / cup 5 has a cylindrical seat 5a having a diameter equal to inner diameter of the casing 2.
  • the connecting means of the support 5 to envelope 2 include a deformable washer 12 which is arranged between an annular face 13 of the support 5 and a nut 14 screwed to the end of the casing 2.
  • the nut 14 thus constitutes an integral bearing surface of envelope 2.
  • the internal diameters D1 of the washer 12 and D2 of the nut 14 are chosen greater than the external diameter of the liner 4, so there is no obstacle placed forward of the coating and likely to disrupt the formation of the nucleus.
  • the washer 12 is shown in more detail in Figures 4a and 4b. It is made of spring steel sheet stamped and it has spring tabs 15 (here four tabs), evenly distributed angularly, and which are supported on the annular face 13 of the support 5.
  • These spring tabs 15 have here the shape of arcs of circles concentric with the washer 12 and they are obtained by cutting the washer.
  • the washer 12 is deformable into compression and it makes it possible to make up for the axial clearances between explosive charge 3 (carrying support 5) and envelope 2, mainly clearances due to expansion differential thermal.
  • the washer secures (with support 5) the axial maintenance of the load 3 relative to the casing 2 of the load.
  • the advantage of this embodiment is that it allows provide excellent mechanical resistance to acceleration load ejection while allowing expansion very reliably and reproducibly.
  • the washer 12 must therefore be defined so that the tabs come to bear on the support and have an orientation such as the direction of rotation of the shell corresponds to an arc oriented from the base of the tongue towards its free end.
  • the cup 5 is interposed between the explosive charge and coating. At the initiation of loading it transmits the shock it receives from the explosive to the coating.
  • a metallic material will preferably be chosen, the shock impedance is lower than that of the coating.
  • the support / cup 5 reduces the influence of a leak gas at the periphery of the coating at the time of initiation of the explosive.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (9)

  1. Geschosserzeugende Ladung (1) mit einer Sprengladung (3), die in einem Mantel (2) angeordnet wird und einer Beschichtung (4), die dazu bestimmt ist, von der Detonation der Sprengladung in Bewegung versetzt zu werden, wobei die Beschichtung (4) von einem Träger (5) mit einer zylindrischen Auflage (5a) angebracht wird, die an den Innendurchmesser des Mantels (2) angepasst ist, wobei der Träger fest mit dem Mantel durch Verbindungsmittel verbunden wird, gekennzeichnet dadurch, dass der Träger (5) mit der Sprengladung (3) in Berührung ist und somit das axiale Halten der Sprengladung (3) in bezug auf den Mantel (2) gewährleistet.
  2. Geschosserzeugende Ladung gemäß dem Anspruch 1, gekennzeichnet dadurch, dass der Träger (5) ringförmig ist.
  3. Geschosserzeugende Ladung gemäß dem Anspruch 2, gekennzeichnet dadurch, dass der Träger (5) eine in etwa kegelförmige Fläche (10) aufweist, die mit der Sprengladung in Berührung ist.
  4. Geschosserzeugende Ladung gemäß dem Anspruch 1, gekennzeichnet dadurch, dass der Träger (5) eine Schale ist, die auf die Sprengladung (3) aufliegt und eine Aussparung (11) umfasst, die die Beschichtung (4) aufnimmt.
  5. Geschosserzeugende Ladung gemäß dem Anspruch 4, gekennzeichnet dadurch, dass der Werkstoff der Schale (5) eine geringere Stoßimpedanz hat als die der Beschichtung (4).
  6. Geschosserzeugende Ladung gemäß dem Anspruch 5, gekennzeichnet dadurch, dass die Beschichtung (4) aus Tantal besteht und die Schale (5) aus Aluminiumlegierung.
  7. Geschosserzeugende Ladung gemäß einem der Ansprüche 1 bis 6, gekennzeichnet dadurch, dass der Träger (5) am Mantel (2) durch Verbindungsmittel befestigt ist, die eine verformbare Scheibe (12) umfassen, die zwischen dem Träger (5) und einer Auflagefläche (14) angeordnet wird, die fest mit dem Mantel (2) verbunden ist.
  8. Geschosserzeugende Ladung gemäß dem Anspruch 7, gekennzeichnet dadurch, dass die verformbare Scheibe (12) regelmäßig winkelig angeordnete Federzungen (15) umfasst, die so liegen, dass eine Druckverformung der Scheibe (12) möglich ist.
  9. Geschosserzeugende Ladung gemäß dem Anspruch 8, gekennzeichnet dadurch, dass die Federzungen (15) die Form von Kreisbögen haben, die zur Scheibe (12) konzentrisch sind.
EP19960402311 1995-11-13 1996-10-30 Hohlladungsgefechtskopf mit verbesserter Beschleunigungsfestigkeit Expired - Lifetime EP0773424B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9513378 1995-11-13
FR9513378A FR2741142B1 (fr) 1995-11-13 1995-11-13 Charge generatrice de noyau ayant une tenue a l'acceleration amelioree

Publications (2)

Publication Number Publication Date
EP0773424A1 EP0773424A1 (de) 1997-05-14
EP0773424B1 true EP0773424B1 (de) 2000-09-20

Family

ID=9484474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960402311 Expired - Lifetime EP0773424B1 (de) 1995-11-13 1996-10-30 Hohlladungsgefechtskopf mit verbesserter Beschleunigungsfestigkeit

Country Status (3)

Country Link
EP (1) EP0773424B1 (de)
DE (1) DE69610395T2 (de)
FR (1) FR2741142B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2812384B1 (fr) 2000-07-26 2002-12-06 Giat Ind Sa Dispositif de neutralisation d'une charge utile
DE10221759B4 (de) * 2002-05-16 2005-03-31 Diehl Munitionssysteme Gmbh & Co. Kg Gefechtskopf
DE102012007203B4 (de) * 2012-04-12 2015-03-05 TDW Gesellschaft für verteidigungstechnische Wirksysteme mbH Verfahren und Einrichtung zur Erhöhung der Leistung einer Hohlladung mit kunststoffgebundenem Sprengstoff bei tiefen Temperaturen
WO2016161376A1 (en) * 2015-04-02 2016-10-06 Hunting Titan, Inc. Snap-on liner retention device
GB2582670B8 (en) * 2019-05-25 2023-10-25 Alford Ip Ltd Improvements in or relating to explosive charges
DE102022003744A1 (de) 2022-10-12 2024-04-18 Diehl Defence Gmbh & Co. Kg Feinabstimmung eines explosiv geformten Projektils

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2086531A5 (en) * 1970-04-01 1971-12-31 Clausin Pierre Plate charges - insulating screen
DE2046372C3 (de) * 1970-09-19 1978-11-23 Dynamit Nobel Ag, 5210 Troisdorf Hohlladung
DE2807309C1 (de) * 1978-02-21 1987-07-23 Messerschmitt Boelkow Blohm Sprengladung mit stachel- oder projektilbildenden Belegungen
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
DE3933955A1 (de) * 1989-10-11 1991-04-18 Diehl Gmbh & Co Submunition mit einer hohlladung
SE502461C2 (sv) * 1991-07-01 1995-10-23 Bofors Ab Sätt vid projektilbildande explosiva laddningar

Also Published As

Publication number Publication date
FR2741142B1 (fr) 1998-01-02
EP0773424A1 (de) 1997-05-14
FR2741142A1 (fr) 1997-05-16
DE69610395T2 (de) 2001-03-08
DE69610395D1 (de) 2000-10-26

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