EP1429107B1 - Hohlladung - Google Patents

Hohlladung Download PDF

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Publication number
EP1429107B1
EP1429107B1 EP20030104269 EP03104269A EP1429107B1 EP 1429107 B1 EP1429107 B1 EP 1429107B1 EP 20030104269 EP20030104269 EP 20030104269 EP 03104269 A EP03104269 A EP 03104269A EP 1429107 B1 EP1429107 B1 EP 1429107B1
Authority
EP
European Patent Office
Prior art keywords
axis
jet
confinement
tube
liner
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 - Fee Related
Application number
EP20030104269
Other languages
English (en)
French (fr)
Other versions
EP1429107A1 (de
Inventor
Henri Ropars
Joel Ferron
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.)
TDA Armements SAS
Original Assignee
TDA Armements SAS
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Filing date
Publication date
Application filed by TDA Armements SAS filed Critical TDA Armements SAS
Publication of EP1429107A1 publication Critical patent/EP1429107A1/de
Application granted granted Critical
Publication of EP1429107B1 publication Critical patent/EP1429107B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/10—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
    • F42B12/14—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge the symmetry axis of the hollow charge forming an angle with the longitudinal axis of the projectile

Definitions

  • the present invention relates to a core generating charge. It applies in particular to the charges placed in the ammunition acting in overflight of their objective.
  • Core generating charges also known as shaped charges or "Explosively Formed Penetrators (EFP)" in the ango-saxon literature
  • EFP Extensively Formed Penetrators
  • the coating is deformed to form a core, projected at a speed of the order of 2000 m / s to a target.
  • Such charges are used to form the military ammunition heads. They are also used in industry (drilling, mining ). The general operating principles of these charges are described in the W.P. "Fundamentals of Shaped Charges" document. Walters and J. A. Zukas (Publisher: CMCPress, ISBN: 0-471-62172-2).
  • the armored targets are more particularly vulnerable at the level of their upper parts, which is why it is sought to define ammunition nucleus generating charge whose direction of action is substantially vertical.
  • the FR2771166 describes for example an ammunition which acts in flying over the objective and which comprises a military head whose direction of action is substantially normal to the axis of the munition (ie substantially the direction of flight of the ammunition) .
  • the munition comprises a core generating charge whose confinement is substantially cylindrical in shape.
  • the coating is arranged so that the direction in which it is projected is perpendicular to the axis of the cylinder.
  • a disadvantage of this solution is that the position of the coating relative to the confinement does not effectively exploit all the explosive present in the confinement. This is the case in particular of the explosive at the periphery of the coating, the detonation of which does not contribute to the projection of the core.
  • the formed core can break into several pieces.
  • An object of the invention is to propose a core generating charge, intended to be used in a munition pulling along an axis. (direction of action) perpendicular to the axis of the munition, and which does not have these disadvantages.
  • One of the main advantages of the invention is that, for a given caliber of ammunition, it is possible to define a load whose volume is not limited by this caliber.
  • the invention makes it possible, by increasing the amount of explosive and the mass of the coating, to obtain a core which is more efficient than that of an axially symmetrical core generating charge housed in a similar manner in the munition.
  • this geometry makes it possible to facilitate the production of loads whose characteristics respect the planes of symmetry of the load, in particular for embodiments of loadings by casting or compression.
  • the void left between the confinement and the ammunition structure can be used to house electronic modules or as a passage for electrical cables.
  • the length of the short side of the rectangle is substantially equal to the length of the confinement along the axis of the tube.
  • the section of the tube is substantially an ellipse. This allows a good machinability of the confinement.
  • the shape of the coating has two perpendicular planes of symmetry whose intersection forms the axis of the tube.
  • the coating has at least one concave face.
  • the concave face of the coating is spherical or toric or ellipsoidal.
  • the average value of the radius of curvature of the concave face of the coating is equal to twice the length of the tube along its axis within plus or minus 20%.
  • initiators are placed on the surface of the confinement facing the coating.
  • the initiators are distributed symmetrically with respect to the planes of symmetry of the coating.
  • the initiators are four in number.
  • FIG. 1 to 3 represents an example of an ammunition comprising a load according to the invention.
  • the ammunition 2 has a substantially cylindrical body with respect to an axis of symmetry 3.
  • the axis of symmetry 3 is substantially horizontal, aligned with the direction of movement of the ammunition, when the ammunition is in flight.
  • the ammunition 2 has a load 1 placed inside.
  • This charge has a direction of action 4 substantially vertical, that is to say perpendicular to the axis of symmetry 3.
  • the load 1 comprises a containment 5 in which is placed an explosive charge (not shown). Containment may be made of steel, aluminum or plastic material for example.
  • the charge further comprises at least one initiator (not visible in this figure) for initiating the detonation of the explosive charge.
  • the containment 5 has an opening closed by a coating 6.
  • the coating is intended to form a core during the detonation of the explosive charge.
  • the coating may be made of metal, such as tantalum, nickel, iron or copper, for example.
  • the coating is located on one side of the ammunition, inside the outer profile of the munition and flush with the latter in its outermost parts.
  • the confinement substantially forms a tube along the axis 4.
  • the tube has in the horizontal plane (plane perpendicular to the axis 4) a section which is inscribed in a rectangle 7.
  • the section of the tube is an ellipse or almost a ellipse.
  • Rectangle 7 has a large side 8 and a small side 9 of different lengths.
  • the long side 8 is parallel to the axis 3.
  • the confinement being housed in the munition 2 its length along the axis 4 and the length of the short side 9 are limited by the caliber of the ammunition 2.
  • the length of the confinement along the axis 4 and the length of the short side of the rectangle are such that the confinement can be housed in a cylindrical tube (ammunition section) of axis parallel to the long side 8.
  • the length of the short side 9 is substantially equal to the length of the confinement along the axis of the tube 4.
  • the coating has two planes of symmetry 10 and 11. These planes of symmetry are perpendicular and their intersection forms the axis of the tube (axis 4).
  • the initiators 12 can be four in number and positioned on the face of the confinement 5 facing the coating 6, symmetrically with respect to the symmetry planes 10, 11 of the coating.
  • the coating may itself be symmetrical with respect to the planes 10, 11.
  • the explosive charge detonates by forming a wave symmetrical with respect to the planes 10, 11.
  • the coating being itself symmetrical with respect to the planes 10, 11, there is obtained a core propagating along the axis 4, and symmetrical with respect to the planes 10, 11.
  • the coating has at least one concave face.
  • the other side of the coating 16 may be flat or convex (if the coating has a constant thickness for example).
  • the concave face 15 of the coating is advantageously spherical, toric or ellipsoidal.
  • the average value of the radius of curvature 14 of the concave face 15 of the coating is equal to twice the length of the tube along its axis 4 within plus or minus 20%.
  • the coating closes the entire section of the tube. It therefore presents in this example a projection in a horizontal plane (plane perpendicular to the axis 4) elliptical 13. This allows not only to form a nucleus with greater efficiency, but also to allow to have a contact area between the coating and the confinement that is not limited by the thickness of the confinement (the contact is with the inner surface of the confinement, and not with an edge of the confinement).
  • the invention is not limited to this embodiment.
  • the number of initiators can be different.
  • the coating may have a variable thickness.

Landscapes

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

Claims (10)

  1. Kernerzeugende Ladung (1), die eine Hülle (5) und eine Beschichtung (6) enthält, die dazu bestimmt ist, einen Kern zu bilden, wobei die Hülle im Wesentlichen ein Rohr gemäß einer Achse (4) bildet, wobei das Rohr an einem Ende offen ist, wobei die Beschichtung die Öffnung der Hülle verschließt, so dass der durch die Detonation gebildete Kern in einer Richtung im Wesentlichen parallel zur Achse (4) des Rohrs in Bewegung versetzt wird, dadurch gekennzeichnet, dass das Rohr einen Querschnitt lotrecht zur Achse besitzt, der in einem Rechteck (7) liegt, wobei die zwei Seiten (8, 9) des Rechtecks unterschiedliche Längen haben, wobei die Länge der Hülle gemäß der Achse und die Länge der kleinen Seite (9) des Rechtecks so sind, dass die Hülle in einem Zylinder mit einer Achse parallel zur großen Seite (8) des Rechtecks angeordnet werden kann.
  2. Kernerzeugende Ladung nach Anspruch 1, dadurch gekennzeichnet, dass die Länge der kleinen Seite (9) des Rechtecks im Wesentlichen gleich der Länge der Hülle gemäß der Achse des Rohrs ist.
  3. Kernerzeugende Ladung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Querschnitt des Rohrs im Wesentlichen eine Ellipse ist.
  4. Kernerzeugende Ladung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Form der Beschichtung zwei lotrechte Symmetrieebenen (10, 11) besitzt, deren Schnittpunkt die Achse (4) des Rohrs bildet.
  5. Kernerzeugende Ladung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beschichtung (6) mindestens eine konkave Seite (15) hat.
  6. Kernerzeugende Ladung nach Anspruch 5, dadurch gekennzeichnet, dass die konkave Seite der Beschichtung kugelförmig oder torusförmig oder ellipsenförmig ist.
  7. Kernerzeugende Ladung nach einem der Ansprüche 5 oder 6, dadurch gekennzeichnet, dass der Mittelwert des Krümmungsradius (14) der konkaven Seite der Beschichtung bis auf etwa 20 % gleich dem Doppelten der Länge des Rohrs gemäß seiner Achse ist.
  8. Kernerzeugende Ladung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Initialzünder (12) enthält, die an der Oberfläche der Hülle gegenüber der Beschichtung angeordnet sind.
  9. Kernerzeugende Ladung nach Anspruch 4, dadurch gekennzeichnet, dass sie Initialzünder (12) enthält, die symmetrisch bezüglich der Symmetrieebenen (10, 11) der Beschichtung verteilt sind.
  10. Kernerzeugende Ladung nach Anspruch 9, dadurch gekennzeichnet, dass es vier Initialzünder gibt.
EP20030104269 2002-12-13 2003-11-19 Hohlladung Expired - Fee Related EP1429107B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0215840A FR2848657B1 (fr) 2002-12-13 2002-12-13 Charge generatrice de noyau
FR0215840 2002-12-13

Publications (2)

Publication Number Publication Date
EP1429107A1 EP1429107A1 (de) 2004-06-16
EP1429107B1 true EP1429107B1 (de) 2010-01-20

Family

ID=32320222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030104269 Expired - Fee Related EP1429107B1 (de) 2002-12-13 2003-11-19 Hohlladung

Country Status (4)

Country Link
EP (1) EP1429107B1 (de)
AU (1) AU2003264628B2 (de)
DE (1) DE60331038D1 (de)
FR (1) FR2848657B1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019731A (en) * 1960-02-19 1962-02-06 Advanced Oil Tools Inc Jet perforator for well casings
DE2741984C2 (de) * 1977-09-17 1984-01-26 Franz Rudolf Prof.Dr.Dipl.-Ing. West Vancouver Thomanek Gefechtskopf für einen Panzerabwehrflugkörper mit mindestens einer stachelbildenden Hohlladung
FR2736424B1 (fr) * 1995-07-07 1997-08-08 Giat Ind Sa Tete militaire a charge formee
FR2771166B1 (fr) 1997-11-20 1999-12-17 Giat Ind Sa Projectile ayant une direction d'action radiale
SE522568C2 (sv) * 2000-09-04 2004-02-17 Saab Ab Förfarande för hastighetskompensering av en RSV-stråle, samt robot

Also Published As

Publication number Publication date
FR2848657B1 (fr) 2005-01-28
EP1429107A1 (de) 2004-06-16
FR2848657A1 (fr) 2004-06-18
DE60331038D1 (de) 2010-03-11
AU2003264628A1 (en) 2004-07-01
AU2003264628B2 (en) 2009-12-03

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