EP1988355A1 - Splitter erzeugendes Projektil - Google Patents

Splitter erzeugendes Projektil Download PDF

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Publication number
EP1988355A1
EP1988355A1 EP08290277A EP08290277A EP1988355A1 EP 1988355 A1 EP1988355 A1 EP 1988355A1 EP 08290277 A EP08290277 A EP 08290277A EP 08290277 A EP08290277 A EP 08290277A EP 1988355 A1 EP1988355 A1 EP 1988355A1
Authority
EP
European Patent Office
Prior art keywords
projectile
envelope
splinter
projectile according
casing
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Withdrawn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
EP08290277A
Other languages
English (en)
French (fr)
Inventor
Dominique Roux
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 EP1988355A1 publication Critical patent/EP1988355A1/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Withdrawn legal-status Critical Current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
    • F42B12/34—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect expanding before or on impact, i.e. of dumdum or mushroom type
    • 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 and in particular projectiles of medium caliber (caliber less than or equal to 50 mm).
  • the patent FR-2673461 thus proposes a fragmentable perforating projectile whose body contains a mass of inert compression material (for example an elastomer or a metal powder). The material is compressed in a bore of the body and exerts a prestress on the latter. During the impact on a target the additional stress applied to the body of the projectile causes its fragmentation.
  • inert compression material for example an elastomer or a metal powder
  • the known concepts not only make it possible to avoid the use of explosive and means of initiation, but they also make it possible to reduce the lethal radius of the projectile. Splinters remain in a smaller area and collateral effects are minimized.
  • EP1000311 The concepts proposed by EP1000311 are also difficult to implement in medium caliber. It is difficult to associate for a caliber less than 50 mm a body cylindrical chip generator with a bearing structure ensuring the ballistic trajectory of the projectile.
  • the warhead which is essential for the ballistic flight of the projectile must not disturb the effect on the target of the splinter generating body and its filling. It must therefore be as thin as possible. It must, however, withstand the constraints of shooting and implementation in the weapon.
  • EP1000311 consider (without specifying the caliber) a variant in which the warhead is filled with a filling material.
  • EP-1000311 one of the essential features of the concept proposed by EP-1000311 is the existence of a planar face at the front of the chip generator, which face impacts on the target and at which the filling material is compressed and can exert a radial stress on the generator of fragments.
  • the object of the invention is to propose a projectile of medium caliber generating splinters and implementing an inert loading, projectile in which the operation at impact is ensured as well as the mechanical and ballistic resistance of the projectile.
  • the projectile according to the invention is simple and inexpensive to manufacture.
  • the subject of the invention is thus a splinter-generating projectile comprising a perforating envelope enclosing an expanding material capable under the pressure of perforation of accelerating radially the material of the envelope, projectile comprising at its front end a ballistic ogive, projectile characterized in that the expanding material extends beyond the perforating envelope to fill substantially the entire internal volume to the warhead and thus ensure the mechanical strength of the latter.
  • the ballistic warhead will preferably have a front portion having a substantially constant thickness and less than or equal to one millimeter.
  • the perforating envelope is sub-calibrated and disposed inside a projectile body.
  • Training means will be provided to ensure the rotational drive of the perforating envelope by the body.
  • These drive means may comprise a conical bearing surface of the body cooperating with a complementary bearing carried by a rear face of the casing.
  • the drive means may comprise a threading formed on the outer cylindrical surface of the casing and cooperating with a complementary tapping carried by the body.
  • the envelope may have a front portion extending forward of the body.
  • the front portion of the envelope may thus extend substantially to the ogive and the expanding material will include an annular bearing bearing against the cylindrical front face of the envelope.
  • the perforating envelope may constitute the actual body of the projectile.
  • the warhead will then have a thick rear portion that will be placed in a bore of the body and which will end with a thinned front portion.
  • the projectile generating chips according to the invention will have a caliber less than or equal to 50 mm.
  • a projectile 1 fragment generator according to a first embodiment of the invention comprises a substantially cylindrical body 2 which ends at its rear part by a solid bottom 3.
  • the body 2 carries a sealing belt 4 and a rear groove 5 for fixing it by crimping on a socket (not shown).
  • the body 2 here constitutes a perforating envelope generating splinters. It is made of a dense material, for example steel.
  • the body 2 is extended at its front by a ballistic ogive 6 which is made of a light material such as an aluminum alloy or a plastic or composite material.
  • the nose 6 has a thin front portion 6a extended by a rear portion 6b thick which is placed in a bore 7 of the body 2.
  • the nose 6 is fixed to the body 2 by threading or crimping.
  • the body 2 contains an expanding material 8 capable, under the pressure due to the perforation, of accelerating the material of the body radially 2.
  • an expanding material 8 capable, under the pressure due to the perforation, of accelerating the material of the body radially 2.
  • a material of low density will be adopted with respect to to the material of the spark generator envelope 2.
  • a plastic material or aluminum may be used. This material will be machined to the desired shape before being placed in the body 2.
  • the bottom 11 of the bore 7 is conical. This conicity ensures the rotational drive of the material 8 by the body 2 when firing the projectile.
  • the expanding material 8 extends beyond the perforating envelope formed by the body 2 to fill substantially all the internal volume to the ogive 6.
  • the material 8 thus ensures the mechanical strength of the ogive 6, both during the handling phases or implementation in the weapon, as the ballistic trajectory of the projectile.
  • This mechanical strength is ensured despite the reduced thickness of the front portion 6a of the nose 6.
  • This thickness is substantially constant at the front portion 6a and is less than or equal to 1 millimeter.
  • the front portion 6a of the warhead 6 extends over a length L which corresponds substantially to half the total length of the warhead.
  • the rear portion 6b has a cylindrical internal bore 9.
  • the internal profile of the ogive 6 thus passes at a plane perpendicular to the axis 18 of the projectile of a portion 6a, thin and of substantially constant thickness, to a thick rear portion 6b which extends the body 2 of the projectile.
  • the expanding material 8 contained in the front part 6a of the warhead will cause the shear of the latter substantially at the plane 10.
  • the ogive 6 does not interfere with the interaction of the projectile with the target.
  • the material 8 will thus be compressed inside the bore 7, extended by the bore 9. This will result in a radial stress on the rear part 6b of the nose and then on the body 2 and the formation of splinters .
  • the advantage of this embodiment is that the projectile structure is extremely simple. It is the body 2 that plays the role of splinter generator. The filling material 8 is manufactured separately and is then placed in the body 2. The ogive 6 is finally attached to the body and completes the structure of the projectile.
  • the figure 2 shows another embodiment of the invention in which is implemented a fragment generator of different structure.
  • the chip generator here comprises a perforating envelope 12 enclosing the expanding material 8.
  • This perforating envelope 12 is under-calibrated and disposed inside a projectile body 2.
  • tungsten envelope may be made to meet certain operational characteristics (density and desired volume for the chips).
  • the body 2 is here made of aluminum alloy. It comprises an internal bore which comprises a cylindrical bearing surface 13 ensuring radial retention of the casing 12.
  • the internal bore also comprises a conical rear bearing surface 14 which cooperates with a complementary bearing surface secured to a rear face of the casing 12.
  • This conical bearing surface 14 constitutes a means for ensuring the rotational drive of the perforating casing 12 by the body 2.
  • the bore internal to the body 2 extends behind the casing 12 by a cylindrical portion 15. Furthermore the casing 12 has a front portion 12a which extends forward of the body 2 over a length 1.
  • the front portion 12a of the envelope thus extends substantially to the nose 6.
  • the widening material 8 completely fills the envelope 12 and it also fills the inside of the front portion 6a of the nose 6.
  • the expanding material thus comprises an annular bearing surface 16 bearing against the front cylindrical face of the casing 12. This support prevents any shearing of the ogive 6 by the casing during the handling and firing phases of the projectile.
  • the nose 6 has a rear portion 6b thicker and which is fixed on an outer cylindrical surface 17 of the body 2, for example by threading or crimping.
  • the material 8 ensures the mechanical strength of the nose 6 during the phases preceding the impact on a target, despite the reduced thickness of the warhead.
  • the material 8 located inside the front part of the nose 6 is deformed and causes an expansion of the warhead.
  • the latter is detached from the body 2 at the level of the span 17 and it is also sheared by the front portion of the envelope 12.
  • the disturbances caused to the envelope 12 are therefore minimized.
  • the envelope 12 impacts the target and the material 8 ensures the fragmentation of the envelope 12. Note that, the envelope 12 extending in front of the body 2, it does not interfere either the generation of chips by the 'envelope.
  • the density of the body 2 is very different from that of the envelope 12 (steel or tungsten alloy).
  • the body 2 thus makes it possible to position the casing in a relatively advanced manner relative to the body which facilitates the generation of splinters while ensuring the ballistic profile necessary for the flight of the projectile.
  • the bore 15 may if necessary allow to position a complementary balancing ballast or it may receive a pyrotechnic composition to provide a complementary effect after target perforation.
  • a pyrotechnic composition may be provided.

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)
EP08290277A 2007-04-30 2008-03-26 Splitter erzeugendes Projektil Withdrawn EP1988355A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0703127A FR2915563B1 (fr) 2007-04-30 2007-04-30 Projectile generateur d'eclats

Publications (1)

Publication Number Publication Date
EP1988355A1 true EP1988355A1 (de) 2008-11-05

Family

ID=38776398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08290277A Withdrawn EP1988355A1 (de) 2007-04-30 2008-03-26 Splitter erzeugendes Projektil

Country Status (2)

Country Link
EP (1) EP1988355A1 (de)
FR (1) FR2915563B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2407747A3 (de) * 2010-07-12 2015-02-18 Explosia a.s. Projektil mit Hohlzylinderpenetrator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH536481A (de) * 1971-03-29 1973-06-15 Oerlikon Buehrle Ag Treibspiegelgeschoss und Verfahren zu dessen Herstellung
US4301737A (en) * 1979-10-04 1981-11-24 The United States Of America As Represented By The Secretary Of The Army Multi-purpose kinetic energy projectile
EP0146745A1 (de) * 1983-12-22 1985-07-03 Werkzeugmaschinenfabrik Oerlikon-Bührle AG Unterkalibriges, stabilisiertes Mehrzweckgeschoss
FR2673461A1 (fr) 1991-02-28 1992-09-04 Giat Ind Sa Projectile perforant et fragmentable.
EP0989381A2 (de) * 1999-02-25 2000-03-29 Oerlikon Contraves Pyrotec AG Unterkalibergeschoss
EP1000311A1 (de) 1997-01-08 2000-05-17 Geke Ingenieurbüro Geschoss oder gefechtskopf
EP1316774A1 (de) * 2001-11-28 2003-06-04 GEKE Technologie GmbH Geschosse hoher Penetrations- und Lateralwirkung mit integrierter Zerlegungseinrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH536481A (de) * 1971-03-29 1973-06-15 Oerlikon Buehrle Ag Treibspiegelgeschoss und Verfahren zu dessen Herstellung
US4301737A (en) * 1979-10-04 1981-11-24 The United States Of America As Represented By The Secretary Of The Army Multi-purpose kinetic energy projectile
EP0146745A1 (de) * 1983-12-22 1985-07-03 Werkzeugmaschinenfabrik Oerlikon-Bührle AG Unterkalibriges, stabilisiertes Mehrzweckgeschoss
FR2673461A1 (fr) 1991-02-28 1992-09-04 Giat Ind Sa Projectile perforant et fragmentable.
EP1000311A1 (de) 1997-01-08 2000-05-17 Geke Ingenieurbüro Geschoss oder gefechtskopf
EP0989381A2 (de) * 1999-02-25 2000-03-29 Oerlikon Contraves Pyrotec AG Unterkalibergeschoss
EP1316774A1 (de) * 2001-11-28 2003-06-04 GEKE Technologie GmbH Geschosse hoher Penetrations- und Lateralwirkung mit integrierter Zerlegungseinrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2407747A3 (de) * 2010-07-12 2015-02-18 Explosia a.s. Projektil mit Hohlzylinderpenetrator
CZ306529B6 (cs) * 2010-07-12 2017-03-01 Explosia A.S. Střela s trubkovým penetrátorem

Also Published As

Publication number Publication date
FR2915563B1 (fr) 2010-10-15
FR2915563A1 (fr) 2008-10-31

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