EP2006632A1 - Splitter erzeugendes Projektil - Google Patents

Splitter erzeugendes Projektil Download PDF

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Publication number
EP2006632A1
EP2006632A1 EP08290563A EP08290563A EP2006632A1 EP 2006632 A1 EP2006632 A1 EP 2006632A1 EP 08290563 A EP08290563 A EP 08290563A EP 08290563 A EP08290563 A EP 08290563A EP 2006632 A1 EP2006632 A1 EP 2006632A1
Authority
EP
European Patent Office
Prior art keywords
insert
projectile
envelope
inserts
splinter
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Withdrawn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
EP08290563A
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.)
KNDS Ammo France 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 EP2006632A1 publication Critical patent/EP2006632A1/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Withdrawn legal-status Critical Current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 detonation of the explosive charge causes the projection of a sheaf of splinters.
  • the patent FR-2673461 thus proposes a fragmentable perforating projectile whose body contains a mass of an inert compression material (for example an elastomer or a metal powder).
  • an 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 body.
  • the additional constraint that is applied to the body of the projectile causes its fragmentation.
  • 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.
  • EP-1000311 do not allow more to increase the sensitivity to the impact of a chip generator. Indeed, there is no question in EP1000311 to prestress the projectile body. The only energy that can fragment the envelope is the one that is communicated to it by the deformation of the filling material to the impact on the target.
  • EP-1000311 The projectiles described by EP-1000311 are therefore less easily fragmentable than those described by FR-2673461 .
  • the object of the invention is to propose a projectile generating fragments which implements an inert, projectile loading in which impact operation is ensured, even on a light target.
  • the projectile according to the invention makes it easy to control the prestressing of the envelope and the level of additional stress that will be caused by the impact on a target.
  • the envelope may also not be prestressed but simply be constrained by the impact on a target.
  • the invention will improve the sensitivity to fragmentation at impact on a light target.
  • the projectile according to the invention is simple and inexpensive to manufacture. When prestressed during manufacture, the level of the latter is easy to obtain in a reproducible manner.
  • the invention is particularly interesting for making projectiles of medium size (less than 50 mm). Indeed it implements components of simple shapes, easy to produce in large series.
  • the invention can also be implemented for projectiles of higher caliber. In any case, it will facilitate the preloading of the envelope generating splinters and / or facilitate the generation of splinters on impact on a light target (ie less than one equivalent thickness of 2 mm of aluminum).
  • the subject of the invention is a splinter-generating projectile comprising a perforating envelope enclosing a widening material capable, under the pressure due to the perforation of a target, of accelerating radially the material of the envelope, a projectile characterized in that it comprises at least one insert which is introduced at least partially into the expanding material during assembly and / or during the impact so as to exert a mechanical stress in the expanding material and in the envelope.
  • the expanding material comprises at least one piercing for receiving the inserts.
  • the inserts may have a generally cylindrical profile.
  • the insert or inserts may include a conical front portion.
  • the insert or inserts may be substantially completely introduced into the expanding material during assembly of the projectile.
  • the insert or inserts may be introduced only partially into the expanding material during the mounting of the projectile, and they will then be introduced more completely during the impact on a target.
  • the insert or inserts may be arranged outside the expanding material and will then be introduced into the latter during the impact on a target.
  • the envelope may be closed at a front portion by a partition, the inserts or through the partition at the level of holes.
  • the partition may for example be formed integrally with the envelope and it will comprise at least one annular rupture primer facilitating separation of the partition and the envelope during the impact on a target.
  • the projectile may have only one insert disposed axially projectile.
  • the insert may comprise a head which will cooperate with a holding means secured to an ogive of the projectile.
  • a projectile 1 fragment generator according to a first embodiment of the invention comprises a substantially cylindrical perforating envelope 2 which encloses an expanding material 3 capable under pressure due to the perforation of a target to accelerate radially the material of the envelope 2.
  • the envelope 2 will be made of a dense material, for example steel.
  • a low-density material will be adopted with respect to the material of the spark-generating envelope 2.
  • a plastic material or aluminum may be used. This material will be molded directly into the envelope 2 or machined to the desired shape before being placed in the envelope 2.
  • the casing 2 carries a sealing belt 4 and a rear groove 5 for fixing it by crimping on a sleeve (not shown).
  • the envelope 2 is extended at its front by a ballistic ogive 6 made of a light material (for example aluminum alloy or a plastic or composite material).
  • This warhead is intended to be destroyed on impact on a target so as not to disturb the operation of the chip generator which is formed by the envelope 2 filled with the expanding material 3.
  • the envelope 2 is closed at a front part by a partition 7.
  • the partition 7 is formed in one piece with the envelope 2 and it comprises at least one primer annular rupture 8 which facilitates the separation of the partition and the envelope during the impact on a target.
  • the projectile 1 is closed at its rear by a base 9 having a cylindrical surface 9a which is in contact with the internal cylindrical surface of the envelope 2.
  • the projectile 1 comprises at least one insert 10 which is introduced at least partially into the expanding material 3.
  • a single insert 10 is provided and it has the shape of a nail or cylindrical rod having substantially the same length as the casing 2.
  • the insert will be made of a metal for example aluminum alloy or steel.
  • the insert 10 is disposed along the axis 12 of the projectile 1. It passes through the partition 7 and comprises a head 10a which is applied against the partition 7. It also comprises a tip 10b which is housed in a cavity formed in an axial stud 11 secured to the base 9.
  • the insert 10 is placed in the press through the partition 7, after assembly of the base 9 and the envelope 2 enclosing the expanding material 3.
  • the insert 10 When it is put in place, the insert 10 exerts a stress in the expanding material 2 which is then compressed and in turn exerts a mechanical stress on the casing 2.
  • the material 3 is indeed weakly compressible and the insert 10 which occupies a certain volume inside the casing 2 therefore pushes the material 3 against the casing 2.
  • the tip 10b of the insert 10 is positioned in the cavity of the axial stud 11. Such an arrangement avoids any radial movement of the insert during firing of the projectile. This avoids any unbalance during the rotation of the projectile, unbalance that would be caused by an offset of the insert 10.
  • Another advantage of the axial stud 11 is that it allows during assembly to ensure a refocusing of the insert 10 when it is forced into a material 3 devoid of before-hole to receive it.
  • This volume is easy to control in a reproducible way since it depends only on the geometry of the insert 10 and its depth of penetration in the expanding material 3.
  • the figure 2 shows another embodiment of the invention in which the insert 10 is not completely introduced into the expanding material 3.
  • the insert 10 is thus introduced with a length L2 in the expanding material 3 and there remains a length L1 of the insert 10 which extends, outside the material 3, in the ogive 6.
  • This figure shows the front hole 3a which is arranged in the material 3 to receive the insert 10.
  • the casing 2 is less preloaded by the insertion of the insert 10 than in the previous embodiment.
  • the prestressing level of the casing 2 is easily controlled by controlling the insertion depth L 2 of the insert 10.
  • This level of stress will increase in a controlled manner (related to the additional length L1 of embedding that is possible).
  • the figure 3a shows a projectile 1 which has several inserts 10.1, 10.2, 10.3, parallel to each other and to the axis 12 of the projectile.
  • the projectile 1 here comprises four inserts evenly distributed angularly (only 3 inserts are visible because of the sectional view).
  • the various inserts 10 are fixed to the partition 7 by collages 15.
  • This embodiment is particularly well suited to large projectiles (greater than or equal to 50 mm). Indeed it is possible to limit the stresses exerted on each insert 10 while ensuring a significant overall stress at the level of the envelope 2. It is therefore easier to introduce the inserts 10 and the constraint of the envelope for a big caliber.
  • any imbalance of the projectile can for example provide an axial insert and a ring of inserts distributed around this axial insert. The axial insert can then be depressed to a different depth from that of the peripheral inserts.
  • the figure 3b shows an embodiment close to that of the figure 2 but in which the insert 10 is completely outside the widening material 3.
  • a bushing 13 secured to the partition 7 is provided here.
  • the bushing 13 will have a length sufficient to guide the insert 10 along the axis 12 of the projectile.
  • a collage will ensure the maintenance of the insert during the shooting.
  • This embodiment makes it possible to produce a projectile whose casing 2 is not prestressed during the manufacturing. It is thus possible to produce projectiles having a relatively thin envelope and yet effectively fragmenting even on thin targets.
  • the sleeve 13 may be replaced by another means for holding the insert 10.
  • the insert 10 will be wedged by the foam of the warhead during ballistic phases. The light warhead and the low density foam will be scattered at impact on a target. The insert will be pushed during this impact inside the filling material 3.
  • the figure 3c shows finally an embodiment which differs from the previous ones in that the insert 10 has a conical front portion 14 having its maximum diameter greater than that of the cylindrical rod of the insert 10.
  • This conical portion 14 is positioned in a conical recess complementary to the filling material 3.
  • the insert is placed here by the inside of the casing 2 by introducing the cylindrical portion of the insert 10 through the piercing of the partition 7. Position (or mold) then the filling material 3 and then the base 9 is fixed.
  • the advantage of this embodiment is to obtain a stress level of the envelope 2 more important for a given stroke of the insert. Here, therefore, it is also possible to increase the sensitivity of the projectile to the impact on a thin target.
  • the insert 10 has a head 10a which bears against a holding means which is here a shoulder 16 integral with the ogive 6.

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)
EP08290563A 2007-06-18 2008-06-16 Splitter erzeugendes Projektil Withdrawn EP2006632A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0704317A FR2917492B1 (fr) 2007-06-18 2007-06-18 Projectile generateur d'eclats

Publications (1)

Publication Number Publication Date
EP2006632A1 true EP2006632A1 (de) 2008-12-24

Family

ID=38974072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08290563A Withdrawn EP2006632A1 (de) 2007-06-18 2008-06-16 Splitter erzeugendes Projektil

Country Status (2)

Country Link
EP (1) EP2006632A1 (de)
FR (1) FR2917492B1 (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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US854923A (en) * 1907-04-01 1907-05-28 George F Mcrae Bullet.
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
DE19930474A1 (de) * 1999-07-01 2001-01-04 Dynamit Nobel Ag Teilzerlegungsgeschoß mit Penetrator im Geschoßbug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US854923A (en) * 1907-04-01 1907-05-28 George F Mcrae Bullet.
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
EP1000311B1 (de) * 1997-01-08 2006-07-19 futurtec AG Geschoss oder gefechtskopf
DE19930474A1 (de) * 1999-07-01 2001-01-04 Dynamit Nobel Ag Teilzerlegungsgeschoß mit Penetrator im Geschoßbug

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

Also Published As

Publication number Publication date
FR2917492B1 (fr) 2011-03-18
FR2917492A1 (fr) 2008-12-19

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