EP1970665A2 - Projektil mit splitterbildendem Mittel - Google Patents

Projektil mit splitterbildendem Mittel Download PDF

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Publication number
EP1970665A2
EP1970665A2 EP08290080A EP08290080A EP1970665A2 EP 1970665 A2 EP1970665 A2 EP 1970665A2 EP 08290080 A EP08290080 A EP 08290080A EP 08290080 A EP08290080 A EP 08290080A EP 1970665 A2 EP1970665 A2 EP 1970665A2
Authority
EP
European Patent Office
Prior art keywords
projectile
envelope
piston
generator
projectile according
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.)
Withdrawn
Application number
EP08290080A
Other languages
English (en)
French (fr)
Other versions
EP1970665A3 (de
Inventor
Frédéric Nozeres
Stéphane Cotet
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.)
Nexter Munitions SA
Original Assignee
Nexter Munitions 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 Nexter Munitions SA filed Critical Nexter Munitions SA
Publication of EP1970665A2 publication Critical patent/EP1970665A2/de
Publication of EP1970665A3 publication Critical patent/EP1970665A3/de
Withdrawn legal-status Critical Current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
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/367—Projectiles fragmenting upon impact without the use of explosives, the fragments creating a wounding or lethal effect

Definitions

  • the technical field of the invention is that of projectiles generating chips.
  • Splinter projectiles having a metal shell enclosing an explosive material.
  • the detonation of the explosive causes the rupture of the envelope.
  • the chips may be formed by natural fragmentation or be preformed, for example by embrittlement of the envelope (by machining or localized heat treatments).
  • the chip generator (formed by the envelope loaded with the expanding material) must be able to impact the target in a substantially axial direction without being disturbed by the means ensuring the actual fire from a weapon tube (warhead, shoe, tail ).
  • a sub-calibrated projectile whose body has a filling on which is applied a piston may include a spherical front portion facilitating the generation of splinters to the impact on a target in any direction.
  • Such a projectile is a sub-calibrated, gyro-stabilized projectile which is released by a shoe at the exit of the weapon's tube.
  • the shoe is thus weakened so that it can break quickly by the action of centrifugal forces.
  • the object of the invention is to propose a projectile whose structure ensures the deformation of the envelope by the material during an impact on a target, even following an inclined trajectory.
  • the invention thus proposes an architecture of a projectile incorporating a chip generator and able to be fired from a weapon tube of a given caliber, a projectile in which the chip generator is not disturbed when the impact on a target by the structure of the projectile allowing the shot.
  • the invention relates to a projectile incorporating a splinter generator comprising a perforating envelope enclosing a widening material capable under pressure due to the perforation to accelerate radially the material of the envelope, the perforating envelope being closed at its front by a piston secured to the casing, piston having a rear face applied against the expanding material and an outer portion to the envelope which carries a partially spherical surface, projectile characterized in that the chip generator is under calibrated and disposed inside a projectile body, the fragment generator being secured to the projectile body by a means linkage, the projectile body comprising break primers or longitudinal embrittlement promoting its opening to the impact on a target and the release of the chip generator.
  • the rear face of the piston may be conical.
  • the piston may be attached to the casing by means selected from the following means: threading, keying, crimping, welding or gluing.
  • the connecting means may comprise a rear bore formed in a base integral with the projectile body, the bore receiving the perforating envelope.
  • the perforating envelope may also comprise a conical bottom wall which will cooperate with a conical surface complementary to the bottom of the bore.
  • the body may also include a front bore having at least one bearing surface ensuring the radial positioning of the chip generator.
  • At least one ring of deformable material may be interposed between the positioning range and the chip generator.
  • the projectile may comprise an integral ogive of a front portion of the body and having a spherical cavity which cap the outer surface of the piston and cooperates with it to ensure a Axial force transmission regardless of the angle of impact on a target.
  • the warhead may be fixed to the body by a threaded portion cooperating with a tapping of a front portion of the body surrounding the portion of the piston external to the casing.
  • the warhead will advantageously carry at least one substantially axial hole favoring a diametral widening of the warhead to the impact on a target.
  • the warhead may have a flat front face.
  • the figure 1 shows a chip generator 1 which is intended to be implemented in a projectile (not shown).
  • This fragment generator 1 comprises a generally cylindrical perforating envelope 2 enclosing a material 3 capable, under the pressure due to the perforation of a target, of accelerating the envelope 2 radially.
  • the material 2 is a perforating material such as steel or tungsten while the material 3 (or expanding material) is a material which, when it is compressed axially, deforms radially and thus exerts a stress on the envelope that encloses it.
  • Materials having a lower density than the material of the envelope will preferably be used. for example plastics (such as polyethylene), rubbers or elastomers, composite materials, aluminum.
  • the casing 2 is closed at its front by a piston 4 which is integral with the casing 2.
  • the piston 4 is made of metal material, for example steel, and it has a rear face 5 which is applied against the expanding material 3.
  • the rear face is flat. It will be possible to implement a piston / envelope connection means which makes it possible to ensure a prestressing of the material 3. Such a variant will make it possible to modify the distribution characteristics of the chips on a given target as well as the sensitivity of the generator 1 to the impact. on a target.
  • the piston 4 comprises a front portion which extends outside the casing 2 and which carries a surface 6 partially spherical.
  • Such an arrangement ensures a depression of the piston 4 along the axis 7 of the generator 1 regardless of the angle of impact on a target.
  • FIGS. 2a , 2b show an exemplary embodiment of a projectile 8 according to the invention.
  • a projectile is caliber and large caliber (caliber between 50 mm and 140mm). It is stabilized by empennage, thus pulled by a smooth tube.
  • the chip generator 1 is under calibrated and disposed within a body 13 of the projectile.
  • the body 13 comprises a front portion 13a integral with a base 13b which carries the belt 14 sealing the propellant gases during firing.
  • the base 13b also carries a rear extension 15 for carrying a stabilizer stabilizer (not shown).
  • the chip generator 1 is made integral with the projectile body 13 by a connecting means which comprises a rear bore 16 formed in the base 13b, the bore receiving the rear part of the perforating envelope 2.
  • the perforating envelope 2 is provided with a conical bottom wall 17 which cooperates with a complementary conical surface of the bottom of the bore 16. Indentations may also be made on the bottom of the bore 16
  • the firing acceleration will apply the generator 1 on the base 13b.
  • the conical shapes (with or without indentations) will therefore be held firmly in contact with each other and will ensure the joining in rotation.
  • the front portion 13a of the body comprises a front bore which has at least one bearing surface 18 ensuring the radial positioning of the chip generator 1.
  • a ring 19 of deformable material (for example polyethylene) is placed between the bearing surface 18 and the outer cylindrical surface of the chip generator 1. This ring deforms during assembly of the generator 1 and it makes it possible to catch the variations of machining tolerances of the body 13.
  • the mass of the projectile 8 is lightened which leads to a higher speed for a given firing pressure. It was thus possible to verify that the speed increased from 950 m / s to 1150 m / s for a projectile of 90 mm caliber, an increase of nearly 20%.
  • the perforating envelope 2 is closed at its front by a piston 4 which here has a conical rear portion 5.
  • This conical portion engages in a conical recess of the expanding material 3.
  • the projectile 8 also comprises a nose 20 which comprises a spherical cavity 21 capping the outer surface 6 of the piston 4.
  • a profiled nose 26 also completes the projectile 8 from an aerodynamic point of view.
  • This nose is made of steel or aluminum and its mechanical strength is reduced to ensure its destruction at the slightest ballistic impact.
  • the nose 20 is made of the same material as the piston 4, for example steel.
  • the nose 20 is secured to the front portion 13a of the body 13. It is thus screwed into a tapping 22 formed in the front bore of the body 13 and surrounding a portion of the piston 4 external to the casing 2.
  • the projectile body 13 also comprises longitudinal break-ins or fragilisations 23 which favor its opening on impact on a target (see FIG. figure 2b ).
  • the body 13 here carries four longitudinal grooves 23 machined and regularly distributed angularly.
  • This opening of the body 13 makes it possible to release the chip generator 1 which exerts its action directly on the target without being disturbed by the body 13.
  • the shock of the ogive 20 on the target transmits directly to the body 13 the stress ensuring its rupture.
  • the shock is transmitted to the generator 1 via the spherical connection 6-21.
  • the flat face 25 of the nose 20 also promotes the transfer of the impact energy by generating a plane shock which passes through the nose 20.
  • the spherical contact of the generator 1 on the target also makes it possible to ensure the generation of chips regardless of the actual angle of impact on a target.
  • At least one substantially axial hole 24 will be provided on the warhead. This hole promotes the deformation and the diametral widening of the warhead 20 to the impact on a target.
  • the widening of the nose 20 causes an enlargement of the front portion of the body 13 through the ogive / body connection by the tapping 22. It thus helps to break the body 13.
  • the relatively massive structure of the ogive 20 and the piston 4 made of steel makes it possible to balance the masses of the projectile 8, which is also greatly reduced by the under-calibration of the generator 1. By varying the dimensions of these elements, therefore controls the static margin of the projectile and its stability on trajectory.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
EP08290080A 2007-02-05 2008-01-30 Projektil mit splitterbildendem Mittel Withdrawn EP1970665A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0700780A FR2912211B1 (fr) 2007-02-05 2007-02-05 Projectile incorporant un generateur d'eclats

Publications (2)

Publication Number Publication Date
EP1970665A2 true EP1970665A2 (de) 2008-09-17
EP1970665A3 EP1970665A3 (de) 2013-03-13

Family

ID=38532913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08290080A Withdrawn EP1970665A3 (de) 2007-02-05 2008-01-30 Projektil mit splitterbildendem Mittel

Country Status (2)

Country Link
EP (1) EP1970665A3 (de)
FR (1) FR2912211B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146745A1 (de) 1983-12-22 1985-07-03 Werkzeugmaschinenfabrik Oerlikon-Bührle AG Unterkalibriges, stabilisiertes Mehrzweckgeschoss
FR2756374A1 (fr) 1996-11-28 1998-05-29 Inst Franco Allemand De Rech D Projectile cinetique a effet lateral accru
EP1000311A1 (de) 1997-01-08 2000-05-17 Geke Ingenieurbüro Geschoss oder gefechtskopf

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2235274B (en) * 1981-11-10 1991-09-04 Rheinmetall Gmbh Spin stabilized sub-calibre projetile
US5445079A (en) * 1992-11-10 1995-08-29 Giat Industries Armor-piercing fragmentation projectile
AU2003240740A1 (en) * 2002-06-26 2004-01-19 Geke Technologie Gmbh Projectile or warhead

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146745A1 (de) 1983-12-22 1985-07-03 Werkzeugmaschinenfabrik Oerlikon-Bührle AG Unterkalibriges, stabilisiertes Mehrzweckgeschoss
FR2756374A1 (fr) 1996-11-28 1998-05-29 Inst Franco Allemand De Rech D Projectile cinetique a effet lateral accru
EP1000311A1 (de) 1997-01-08 2000-05-17 Geke Ingenieurbüro Geschoss oder gefechtskopf

Also Published As

Publication number Publication date
FR2912211B1 (fr) 2009-10-23
EP1970665A3 (de) 2013-03-13
FR2912211A1 (fr) 2008-08-08

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