EP0674150A1 - Ammunition with anti-wear additives - Google Patents

Ammunition with anti-wear additives Download PDF

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Publication number
EP0674150A1
EP0674150A1 EP95400557A EP95400557A EP0674150A1 EP 0674150 A1 EP0674150 A1 EP 0674150A1 EP 95400557 A EP95400557 A EP 95400557A EP 95400557 A EP95400557 A EP 95400557A EP 0674150 A1 EP0674150 A1 EP 0674150A1
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EP
European Patent Office
Prior art keywords
projectile
ammunition
wear
belt
cap
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.)
Granted
Application number
EP95400557A
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German (de)
French (fr)
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EP0674150B1 (en
Inventor
Roland Boual
Michel Desevaux
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CTA International SAS
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CTA International SAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/04—Lubrication means in missiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/061—Sabots for long rod fin stabilised kinetic energy projectiles, i.e. multisegment sabots attached midway on the projectile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/045—Cartridges, i.e. cases with charge and missile of telescopic type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/24—Cartridges, i.e. cases with charge and missile for cleaning; for cooling; for lubricating ; for wear reducing

Definitions

  • the field of the present invention is that of munitions intended to be fired by a tube weapon and which comprise a propellant charge and a projectile carrying a belt for sealing against propellant gases.
  • the ammunition engages the tube by its belt at points which will not be covered by the booster until after the passage of the projectile.
  • the wear caused by the latter therefore remains relatively large.
  • anti-wear booster is made even more necessary by the development of telescoped munitions.
  • these munitions comprise a case inside which the projectile is entirely housed.
  • the patent US4715284 describes a telescoped munition in which an annular anti-wear auxiliary layer is deposited on the propellant charge, in front of the projectile.
  • the installation of the booster is a complex operation of deposition on a reactive material (the propellant charge), deposition which can only be carried out after the mounting of the projectile.
  • the makeup distribution mechanism combines the mechanical action of the projectile and that of the propellant gases, with the drawbacks that the latter presents from the point of view of distribution (drawbacks mentioned above).
  • the invention thus provides ammunition, in particular telescoped, which carries an anti-wear supplement which is placed in the case in a simple and inexpensive manner.
  • the means for maintaining the add-on nevertheless ensure its conservation during the phases of storage of the ammunition and ensure the stability of the distribution of the add-on on the barrel of the weapon even after prolonged phases of storage. .
  • the invention also provides an ammunition (telescoped or not) whose anti-wear supplement has a higher protective efficiency with respect to the weapon.
  • the ammunition according to the invention also makes it possible to distribute the anti-wear back-up in a reliable and regular manner in front of the projectile, at points which have not yet been reached by the belt.
  • the backup therefore exerts its protective action directly with respect to the projectile which is fired.
  • the ammunition according to the invention can carry backups of different nature arranged in different reception zones which further increases the effectiveness of the protection provided.
  • This variant is not limited to telescoped ammunition.
  • the subject of the invention is an ammunition comprising a case containing a propellant charge and a projectile, having a body and a belt for sealing against propellant gases, the projectile being telescoped inside the case, ammunition characterized in that that an anti-wear back-up is arranged at at least one receiving area secured to the projectile or to a plug of the case capable of being driven by the projectile during firing.
  • the anti-wear back-up is arranged at at least one reception zone carried by the cap and is therefore driven by the projectile during firing.
  • the cap advantageously has an annular zone in which are arranged at least two bores parallel to the axis of the ammunition and regularly distributed angularly, the bores communicating with an external cylindrical surface of the cap by holes and the anti-wear back-up is placed in the bores.
  • the anti-wear back-up is arranged at the level of at least one reception zone which comprises a front pocket fitted on the hoof, the backup therefore being driven by the projectile during the firing.
  • the anti-wear back-up is arranged at the level of at least one reception zone which comprises at least one peripheral housing arranged on the shoe in front of the belt, the extra being therefore driven by the projectile when fired.
  • the anti-wear back-up is arranged at at least one zone of reception which includes the cover, the make-up therefore being driven by the projectile during the firing.
  • a front anti-wear back-up layer is deposited on at least one reception area which is the very body of the projectile in front of the belt.
  • a rear anti-wear back-up layer is deposited on at least one reception zone which is the very body of the projectile behind the belt.
  • the ammunition comprises a case containing a propellant charge and a projectile, having a body and a belt for sealing against propellant gases
  • this ammunition is characterized in that it comprises at least two receiving zones carrying an anti-wear booster, zones integral with the projectile or capable of being driven by it during firing, the materials constituting the anti-wear additives deposited in each of the two reception zones being of different nature.
  • Such an alternative embodiment is not limited to an application on a telescoped munition.
  • one reception area is located in front of the belt and the other behind the belt.
  • the material or materials placed in front of the belt are compositions making it possible to reduce friction and / or wear and the material or materials placed behind the belt are compositions which reduce the erosive effects of gases hot.
  • a telescoped munition 1 according to a first embodiment of the invention comprises a case 2, made for example in plastic, and closed at its rear end by a plug 3 and at its front end by a ring 4.
  • the case contains a propellant powder, not shown.
  • the rear plug 3 is formed of a metal reinforcing plate 5 on which is fixed by clipping a sealing lip 6 of plastic material.
  • the rear plug 3 carries a known type igniter 7.
  • the front ring 4 comprises a metal tubular reinforcement 8 on which is fixed by clipping a sealing lip 9 made of plastic.
  • a projectile 10 of caliber carries at its rear part a belt 11 fixed by crimping in a groove 12.
  • the projectile carries at its warhead 13 a cap 14, made of plastic or composite, and which has an internal profile 15 corresponding to the external profile of the warhead 13.
  • the cap 14 has an internal cylindrical bore 37, it is fixed to the projectile by gluing (it could also be fixed by snap-fastening).
  • Such a cap is described in detail in patent FR8907231. It has the function of ensuring the maintenance of the projectile relative to the case of the ammunition and of sealing the combustion gases of the propellant charge.
  • the cap is intended to fragment at the exit of the barrel from the weapon by the action of the centrifugal forces which are exerted on it. It comprises an annular portion 16 in which blind bores 17 are arranged, parallel to the axis 18 of the ammunition, which weaken the cap and facilitate its rupture.
  • the bores 17 are regularly distributed angularly, they communicate through holes 20 with an external cylindrical surface 19 of the cap 14.
  • the holes 20 are closed in a simple way by the surface internal cylindrical of the tubular reinforcement 8 of the front ring 4.
  • the bores 17 constitute a receiving zone for an anti-wear makeup 26 constituted for example by a mixture of titanium dioxide and wax which is placed in the bores 17.
  • the top-up may include an anti-wear material associated with a binder with a relative proportion of 30 to 50% of binder.
  • Tungsten trioxide, talc or titanium dioxide can be chosen as anti-wear material, and as a wax binding agent.
  • a plastic cover 21 is fixed for example by bonding to a counterbore 22 arranged on the front face of the ring 4.
  • the projectile 10 also carries a front anti-wear add-on layer 23 deposited on a zone for receiving the same projectile body and in front of the belt 11.
  • the projectile 10 also carries a rear anti-wear back-up layer 24 deposited behind the belt at a conical reception zone 25.
  • These two layers may also consist of a mixture of wax and titanium dioxide or be formed by the deposition of another type of material.
  • the material of the front and rear anti-wear back-up layers will be put in place by casting after fusion and by rotating the projectile to distribute the back-up regularly.
  • the surface thereof In order to improve the attachment of the add-on to the body of the projectile, the surface thereof will be given sufficient roughness (by machining or attack by an acid).
  • the projectile 10 carrying its cap 14 When firing the ammunition, the projectile 10 carrying its cap 14 is pushed into the barrel of the weapon. The displacement of the cap causes the holes 20 to be released.
  • the anti-wear supplement 26 pushed by the longitudinal and centrifugal inertia forces, can then exit through the holes and settle in the tube. Maximum deposit make-up is carried out at the level of the tube where the acceleration of rotation is maximum, that is most often in the second half of the length of the tube.
  • the additional front layer 23 is deposited on the beginning of the scratches and before the engagement of these by the belt.
  • the belt 11 then engages the tube already covered with the protective material.
  • an anti-wear back-up will therefore be put in place successively or jointly by the front layer 23 and by the cap 14.
  • the invention therefore makes it possible to provide a protective effect with respect to the action of the projectile which is fired.
  • the invention makes it possible to provide a protective action at the two points most sensitive to wear: the beginning of striping where the belt engages and the point of maximum rotation acceleration.
  • the start of streaking is protected by the addition from the front layer 23.
  • the maximum rotation acceleration point is protected by the additional element 26 deposited by the cap.
  • the rear booster layer 24 disposed behind the belt 11 makes it possible to complete the protective deposit before firing the following munitions.
  • the fact of binding this layer to the projectile makes it possible to ensure a distribution of the material all along the tube.
  • the add-on 26 will maintain a regular distribution in the case during the entire storage of the ammunition.
  • an anti-wear material such as grease disposed or not in a plastic pocket.
  • FIG. 2 represents a telescoped munition whose case 2 is closed at its rear part by a plug 3 and at its front part by another plug formed by a ring 4.
  • the projectile 10 comprises a sub-calibrated bar 32 placed in a shoe 33 caliber.
  • the sub-calibrated bar carries a tail unit 27 at its rear part.
  • the belt 11 bears against the front ring 4.
  • the projectile is held axially and radially relative to the case by holding means which may include a rear wedge 28 and an elastic ring engaged in the front ring (not shown here ).
  • the shoe 33 of the projectile carries an anti-wear back-up 26 deposited in a front pocket 29 which thus constitutes a reception area for the back-up.
  • the backup is put in place by casting.
  • a protective straw can be put in place after depositing the extra in the pocket to ensure its maintenance in a symmetrical layer during the storage phases.
  • the shoe also carries a rear anti-wear backing layer 24 deposited on an area for receiving the shoe externally behind the belt.
  • the front ring 4 is closed by a cover 21 bonded at the level of a counterbore 22.
  • the cover carries a cylindrical extension 30 having an internal housing 31 which constitutes a reception area for anti-wear back-up 26.
  • a closing straw can be put in place after depositing the extra to ensure its maintenance in the cover in a symmetrical layer.
  • the cover is broken by the projectile when the ammunition is fired, and the make-up 26 which it contains is distributed in the tube at the front of the projectile and driven by it.
  • the add-ons placed in the cover and in the front pocket of the shoe will spread throughout the course of the projectile in the tube.
  • the addition of the cover will spread in particular from the start of the tube and it plays the role of the addition of the front layer described previously with reference to FIG. 1 (it may consist of grease or a talc / mixture wax).
  • the addition of the pocket 29 will take place more gradually along the tube and as much as possible in the second half of the latter when the shot is taken with a striped tube. It plays the role of the cap addition described above and will preferably consist of grease.
  • Addition of the rear layer may include titanium dioxide, tungsten trioxide or talc.
  • Figure 3 also shows a telescoped munition whose case 2 is closed at its rear part by a plug 3 and at its front part by a ring 4 closed by a cover 21 made of plastic.
  • the projectile 10 comprises a sub-calibrated bar 32 disposed in a shoe 33 of the caliber.
  • the projectile is here gyro-stabilized and the shoe has a bottom 33a produced by example in steel and on which a jacket 33b made of plastic is overmolded.
  • the belt 11 is in abutment against the front ring 4, the guiding of the projectile in the ring is also ensured by cylindrical surfaces 34 and 35.
  • a peripheral groove 36 is arranged on the jacket 33b of the shoe 33 in front of the belt 11.
  • This groove is delimited by the ranges 34 and 35, it is intended to lighten the hoof and facilitate its bursting at the outlet of the barrel of the weapon. It constitutes a reception area for anti-wear back-up 26.
  • the anti-wear back-up is maintained by the internal cylindrical surface of the ring and it maintains a regular distribution in the case during the entire storage of the ammunition.
  • the filling deposited in the throat plays the role of adding the front layer described above with reference to FIG. 1 (it may consist of grease or a talc / wax mixture). This supplement spreads in particular from the start of the tube and before engagement of the belt.
  • the shoe 33 of the projectile also carries an anti-wear supplement 26 deposited in a reception area which is a front pocket 29.
  • This supplement plays the role of the cap addition described previously with reference to FIG. 1. It will gradually spread along the tube and as much as possible in the second half of it following the centrifugal forces developed (it will preferably consist of grease).
  • the shoe finally carries a rear anti-wear backing layer 24 deposited on a conical reception area of the bottom 33a of the shoe behind the belt.
  • This top-up may include titanium dioxide, tungsten trioxide or talc. It reduces the erosive effects of hot gases.
  • the embodiment of Figure 3 can also be implemented with a non-telescoped projectile.
  • the case will be crimped onto a groove of the projectile disposed behind the belt.
  • the projectile will carry a rear layer 24 of an anti-wear supplement reducing the erosive effects of the gases (titanium dioxide or tungsten trioxide associated with the wax). It will also carry in the peripheral groove 36 (in front of the belt) an anti-wear and / or anti-friction booster like the talc associated with the wax. This extra will be spread in the barrel of the weapon from the beginning of the barrel and before engagement of the belt.
  • the projectile can finally carry an anti-wear makeup 26 deposited in the front pocket 29.
  • This makeup will be a material reducing friction (such as a grease), and due to its arrangement in the pocket 29, it will be distributed as much as possible in the second half of the tube.
  • the add-ons arranged in the groove 36 and / or in the pocket 29 will be protected by spangles.

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

Abstract

The ammunition, especially for a telescoped round, has a fitting (26) attached to at least one solid section of the shot (10), or it is a stopper carried by the shot on firing. The fitting is of tungsten dioxide, talc or titanium dioxide with a wax lubricant.

Description

Le domaine de la présente invention est celui des munitions destinées à être tirées par une arme à tube et qui comprennent un chargement propulsif et un projectile portant une ceinture d'étanchéité aux gaz de propulsion.The field of the present invention is that of munitions intended to be fired by a tube weapon and which comprise a propellant charge and a projectile carrying a belt for sealing against propellant gases.

Quel que soit leur calibre, ces munitions occasionnent une usure importante au tube de l'arme.Whatever their caliber, these ammunitions cause significant wear to the barrel of the weapon.

Il est connu de prévoir des appoints anti-usure mélangés à la charge propulsive contenue dans l'étui ou déposés sur la paroi interne de ce-dernier. Ainsi le brevet US3148620 décrit diverses compositions, notamment à base de dioxyde de titane et de cire, disposées à l'intérieur du chargement propulsif.It is known to provide anti-wear additives mixed with the propellant charge contained in the case or deposited on the internal wall of the latter. Thus, US Pat. No. 3,148,620 describes various compositions, in particular based on titanium dioxide and on wax, placed inside the propellant charge.

L'inconvénient de telles solutions est que l'appoint mis en place a peu d'effet sur la munition tirée mais est plutôt utile pour les munitions tirées ultérieurement.The disadvantage of such solutions is that the backup installed has little effect on the ammunition fired but is rather useful for the ammunition fired later.

En effet la munition engage le tube par sa ceinture en des points qui ne seront couverts par l'appoint qu'après le passage du projectile. L'usure provoquée par ce dernier reste donc relativement importante.Indeed, the ammunition engages the tube by its belt at points which will not be covered by the booster until after the passage of the projectile. The wear caused by the latter therefore remains relatively large.

De plus il est difficile de maîtriser la répartition de l'appoint dans le tube puisque, d'une part il se trouve projeté par les gaz chauds d'une façon aléatoire et d'autre part la répartition de l'appoint dans l'étui peut dans certain cas se modifier et devenir dissymétrique au cours du stockage de la munition (par l'action de la température et des vibrations).In addition, it is difficult to control the distribution of the make-up in the tube since, on the one hand it is projected by the hot gases in a random manner and on the other hand the distribution of the make-up in the case may in some cases change and become asymmetrical during storage of the ammunition (by the action of temperature and vibrations).

On connaît, notamment par les brevets FR672702 et FR825752, des projectiles qui comportent un appoint anti-usure fixé sur leur paroi externe au moyen d'une enveloppe ou encore placé dans des logements du corps de projectile.Are known, in particular from the patents FR672702 and FR825752, projectiles which include an anti-wear back-up fixed on their external wall by means of an envelope or even placed in housings of the projectile body.

De telles dispositions imposent la mise en oeuvre de moyens de fixation complexes ou la réalisation d'usinages coûteux sur le corps de projectile qui peuvent également nuire à son efficacité terminale.Such provisions require the implementation of complex fixing means or the carrying out of costly machining on the projectile body which can also harm its terminal efficiency.

La mise en oeuvre d'appoint anti-usure est rendue encore plus nécessaire par la mise au point de munitions télescopées.The implementation of anti-wear booster is made even more necessary by the development of telescoped munitions.

D'une façon connue (par exemple par le brevet FR2647891) ces munitions comportent un étui à l'intérieur duquel se loge entièrement le projectile.In a known manner (for example by patent FR2647891) these munitions comprise a case inside which the projectile is entirely housed.

Il en résulte, à performances égales, des dimensions réduites pour la munition, ce qui autorise la mise au point d'armes compactes.This results in equal performance, reduced dimensions for ammunition, which allows the development of compact weapons.

L'accroissement de performances permis par les munitions télescopées conduit à mettre en oeuvre un appoint anti-usure.The increase in performance allowed by telescoped ammunition leads to implementing anti-wear back-up.

Mais la compacité de ces munitions limite le volume disponible dans l'étui et rend encore plus complexe la mise en place d'un tel appoint.However, the compactness of these munitions limits the volume available in the case and makes it even more complex to set up such a booster.

Le brevet US4715284 décrit une munition télescopée dans laquelle une couche annulaire d'appoint anti-usure est déposée sur la charge propulsive, en avant du projectile.The patent US4715284 describes a telescoped munition in which an annular anti-wear auxiliary layer is deposited on the propellant charge, in front of the projectile.

Celui-ci entraîne avec lui une partie de l'appoint lors du tir, le reste de l'appoint étant réparti par la pression des gaz.This brings with it part of the make-up during the firing, the rest of the make-up being distributed by the gas pressure.

Un tel concept présente des inconvénients.Such a concept has drawbacks.

Tout d'abord la mise en place de l'appoint est une opération complexe de dépôt sur un matériau réactif (la charge propulsive), dépôt qui ne peut être effectué qu'après le montage du projectile.First of all, the installation of the booster is a complex operation of deposition on a reactive material (the propellant charge), deposition which can only be carried out after the mounting of the projectile.

Ensuite le mécanisme de répartition de l'appoint combine l'action mécanique du projectile et celle des gaz propulsifs, avec les inconvénients que présente cette dernière du point de vue de la répartition (inconvénients cités précédemment).Then the makeup distribution mechanism combines the mechanical action of the projectile and that of the propellant gases, with the drawbacks that the latter presents from the point of view of distribution (drawbacks mentioned above).

Enfin, l'appoint anti-usure étant déposé sur la charge propulsive, il y a un risque de combinaison chimique entre ces deux éléments, conduisant à une perte de l'efficacité de l'appoint et de la charge après de longues périodes de stockage.Finally, the anti-wear makeup being deposited on the propellant charge, there is a risk of chemical combination between these two elements, leading to a loss of the efficiency of the makeup and the charge after long periods of storage. .

C'est le but de l'invention que de proposer une munition (notamment télescopée) permettant de pallier de tels inconvénients.It is the object of the invention to propose an ammunition (in particular telescoped) making it possible to overcome such drawbacks.

L'invention propose ainsi des munitions, notamment télescopées, qui portent un appoint anti-usure qui est mis en place dans l'étui d'une façon simple et peu coûteuse.The invention thus provides ammunition, in particular telescoped, which carries an anti-wear supplement which is placed in the case in a simple and inexpensive manner.

Les moyens de maintien de l'appoint assurent néanmoins une conservation de celui-ci au cours des phases de stockage de la munition et assurent la stabilité de la répartition de l'appoint sur le tube de l'arme même après des phases de stockage prolongées.The means for maintaining the add-on nevertheless ensure its conservation during the phases of storage of the ammunition and ensure the stability of the distribution of the add-on on the barrel of the weapon even after prolonged phases of storage. .

L'invention propose également une munition (télescopée ou non) dont l'appoint anti-usure a une efficacité protectrice supérieure vis à vis de l'arme.The invention also provides an ammunition (telescoped or not) whose anti-wear supplement has a higher protective efficiency with respect to the weapon.

En effet, ces munitions permettent de répartir de façon fiable et régulière l'appoint anti-usure tout au long du tube de l'arme, puisque l'appoint est réparti par le projectile lui même et non par le chargement propulsif.Indeed, these ammunition allow to distribute reliably and regularly the anti-wear supplement throughout the barrel of the weapon, since the supplement is distributed by the projectile itself and not by the propellant charge.

La munition selon l'invention permet également de répartir de façon fiable et régulière l'appoint anti-usure en avant du projectile, au niveau de points qui n'ont pas encore été atteints par la ceinture.The ammunition according to the invention also makes it possible to distribute the anti-wear back-up in a reliable and regular manner in front of the projectile, at points which have not yet been reached by the belt.

L'appoint exerce donc son action protectrice directement vis à vis du projectile qui est tiré.The backup therefore exerts its protective action directly with respect to the projectile which is fired.

Selon une variante, la munition selon l'invention peut porter des appoints de nature différente disposés en des zones de réception différentes ce qui accroit encore l'efficacité de la protection apportée. Cette variante n'est pas limitée aux munitions télescopées.According to a variant, the ammunition according to the invention can carry backups of different nature arranged in different reception zones which further increases the effectiveness of the protection provided. This variant is not limited to telescoped ammunition.

Ainsi l'invention a pour objet une munition comportant un étui contenant un chargement propulsif et un projectile, présentant un corps et une ceinture d'étanchéité aux gaz propulsifs, le projectile étant télescopé à l'intérieur de l'étui, munition caractérisée en ce qu'un appoint anti-usure est disposé au niveau d'au moins une zone de réception solidaire du projectile ou d'un bouchon de l'étui susceptible d'être entraîné par le projectile lors du tir.Thus the subject of the invention is an ammunition comprising a case containing a propellant charge and a projectile, having a body and a belt for sealing against propellant gases, the projectile being telescoped inside the case, ammunition characterized in that that an anti-wear back-up is arranged at at least one receiving area secured to the projectile or to a plug of the case capable of being driven by the projectile during firing.

Selon un mode de réalisation de l'invention dans lequel le projectile est maintenu par une coiffe, solidaire du projectile et ajustée dans une bague avant fermant l'étui, l'appoint anti-usure est disposé au niveau d'au moins une zone de réception portée par la coiffe et se trouve donc entraîné par le projectile lors du tir.According to one embodiment of the invention in which the projectile is held by a cap, integral with the projectile and fitted in a front ring closing the case, the anti-wear back-up is arranged at at least one reception zone carried by the cap and is therefore driven by the projectile during firing.

La coiffe présentera avantageusement une zone annulaire dans laquelle sont aménagés au moins deux alésages parallèles à l'axe de la munition et régulièrement répartis angulairement, les alésages communiquant avec une surface cylindrique externe de la coiffe par des trous et l'appoint anti-usure est placé dans les alésages.The cap advantageously has an annular zone in which are arranged at least two bores parallel to the axis of the ammunition and regularly distributed angularly, the bores communicating with an external cylindrical surface of the cap by holes and the anti-wear back-up is placed in the bores.

Selon un autre mode de réalisation de l'invention dans lequel le projectile comporte un barreau sous-calibré disposé dans un sabot au calibre, l'appoint anti-usure est disposé au niveau d'au moins une zone de réception qui comprend une poche avant aménagée sur le sabot, l'appoint se trouvant donc entraîné par le projectile lors du tir.According to another embodiment of the invention in which the projectile comprises an under-calibrated bar arranged in a shoe with caliber, the anti-wear back-up is arranged at the level of at least one reception zone which comprises a front pocket fitted on the hoof, the backup therefore being driven by the projectile during the firing.

Selon un autre mode de réalisation de l'invention dans lequel le projectile comporte un barreau sous-calibré disposé dans un sabot au calibre, l'appoint anti-usure est disposé au niveau d'au moins une zone de réception qui comprend au moins un logement périphérique aménagé sur le sabot en avant de la ceinture, l'appoint se trouvant donc entraîné par le projectile lors du tir.According to another embodiment of the invention in which the projectile comprises an under-calibrated bar arranged in a shoe with caliber, the anti-wear back-up is arranged at the level of at least one reception zone which comprises at least one peripheral housing arranged on the shoe in front of the belt, the extra being therefore driven by the projectile when fired.

Selon un autre mode de réalisation de l'invention dans lequel l'étui est fermé par un bouchon formé par une bague avant obturée de façon étanche par un opercule, l'appoint anti-usure est disposé au niveau d'au moins une zone de réception qui comprend l'opercule, l'appoint se trouvant donc entraîné par le projectile lors du tir.According to another embodiment of the invention in which the case is closed by a plug formed by a front ring closed in leaktight manner by a seal, the anti-wear back-up is arranged at at least one zone of reception which includes the cover, the make-up therefore being driven by the projectile during the firing.

Selon un autre mode de réalisation, de l'invention une couche avant d'appoint anti-usure est déposée sur au moins une zone de réception qui est le corps même du projectile en avant de la ceinture.According to another embodiment, of the invention a front anti-wear back-up layer is deposited on at least one reception area which is the very body of the projectile in front of the belt.

Selon un autre mode de réalisation, une couche arrière d'appoint anti-usure est déposée sur au moins une zone de réception qui est le corps même du projectile en arrière de la ceinture.According to another embodiment, a rear anti-wear back-up layer is deposited on at least one reception zone which is the very body of the projectile behind the belt.

Selon une variante de l'invention, la munition comporte un étui contenant un chargement propulsif et un projectile, présentant un corps et une ceinture d'étanchéité aux gaz propulsifs, cette munition est caractérisée en ce qu'elle comporte au moins deux zones de réception portant un appoint anti-usure, zones solidaires du projectile ou susceptibles d'être entraînées par lui lors du tir, les matériaux constituant les appoints anti-usure déposés dans chacune des deux zones de réception étant de nature différentes.According to a variant of the invention, the ammunition comprises a case containing a propellant charge and a projectile, having a body and a belt for sealing against propellant gases, this ammunition is characterized in that it comprises at least two receiving zones carrying an anti-wear booster, zones integral with the projectile or capable of being driven by it during firing, the materials constituting the anti-wear additives deposited in each of the two reception zones being of different nature.

Une telle variante de réalisation n'est pas limitée à une application sur une munition télescopée.Such an alternative embodiment is not limited to an application on a telescoped munition.

Avantageusement, une zone de réception se trouve en avant de la ceinture et l'autre en arrière de la ceinture.Advantageously, one reception area is located in front of the belt and the other behind the belt.

D'une façon préférée, le ou les matériaux disposés en avant de la ceinture sont des compositions permettant de diminuer le frottement et/ou l'usure et le ou les matériaux disposés en arrière de la ceinture sont des compositions diminuant les effets érosifs des gaz chauds.Preferably, the material or materials placed in front of the belt are compositions making it possible to reduce friction and / or wear and the material or materials placed behind the belt are compositions which reduce the erosive effects of gases hot.

Une telle disposition permet d'obtenir une efficacité supérieure de l'action des appoints anti-usure.Such an arrangement makes it possible to obtain a higher effectiveness of the action of anti-wear additives.

D'autres avantages de l'invention apparaîtront à la lecture de la description qui va suivre de différents modes de réalisation, description faite en référence aux dessins annexés et dans lesquels :

  • la figure 1a représente en coupe axiale une munition télescopée selon un premier mode de réalisation de l'invention,
  • la figure 1b est une coupe suivant le plan AA de la figure 1a,
  • la figure 2 représente en coupe axiale une munition télescopée selon un deuxième mode de réalisation de l'invention,
  • la figure 3 représente en coupe axiale une munition télescopée selon un troisième mode de réalisation de l'invention.
Other advantages of the invention will appear on reading the description which follows of different embodiments, description made with reference to the accompanying drawings and in which:
  • FIG. 1a represents in axial section a telescoped munition according to a first embodiment of the invention,
  • FIG. 1b is a section along the plane AA of FIG. 1a,
  • FIG. 2 shows in axial section a telescoped munition according to a second embodiment of the invention,
  • Figure 3 shows in axial section a telescoped munition according to a third embodiment of the invention.

Si on se reporte aux figures 1a et 1b, une munition télescopée 1 selon un premier mode de réalisation de l'invention comporte un étui 2, réalisé par exemple en matière plastique, et fermé à son extrémité arrière par un bouchon 3 et à son extrémité avant par une bague 4.If reference is made to FIGS. 1a and 1b, a telescoped munition 1 according to a first embodiment of the invention comprises a case 2, made for example in plastic, and closed at its rear end by a plug 3 and at its front end by a ring 4.

L'étui contient une poudre propulsive non représentée.The case contains a propellant powder, not shown.

Le bouchon arrière 3 est formé d'une plaque renfort métallique 5 sur laquelle est fixée par clipsage une lèvre d'étanchéité 6 en matière plastique. Le bouchon arrière 3 porte un allumeur de type connu 7.The rear plug 3 is formed of a metal reinforcing plate 5 on which is fixed by clipping a sealing lip 6 of plastic material. The rear plug 3 carries a known type igniter 7.

La bague avant 4 comporte un renfort tubulaire métallique 8 sur lequel est fixée par clipsage une lèvre d'étanchéité 9 en matière plastique.The front ring 4 comprises a metal tubular reinforcement 8 on which is fixed by clipping a sealing lip 9 made of plastic.

Un projectile 10 au calibre porte à sa partie arrière une ceinture 11 fixée par sertissage dans une gorge 12.A projectile 10 of caliber carries at its rear part a belt 11 fixed by crimping in a groove 12.

Le projectile porte au niveau de son ogive 13 une coiffe 14, réalisée en matière plastique ou en composite, et qui présente un profil interne 15 correspondant au profil extérieur de l'ogive 13.The projectile carries at its warhead 13 a cap 14, made of plastic or composite, and which has an internal profile 15 corresponding to the external profile of the warhead 13.

La coiffe 14 comporte un alésage cylindrique interne 37, elle est fixée au projectile par collage (elle pourrait également être fixée par encliquetage).The cap 14 has an internal cylindrical bore 37, it is fixed to the projectile by gluing (it could also be fixed by snap-fastening).

Elle est ajustée de façon serrée dans l'alésage cylindrique 16 de la bague avant 4.It is tightly adjusted in the cylindrical bore 16 of the front ring 4.

Une telle coiffe est décrite en détail dans le brevet FR8907231. Elle a pour fonction d'assurer le maintien du projectile relativement à l'étui de la munition et de réaliser l'étanchéité aux gaz de combustion de la charge propulsive.Such a cap is described in detail in patent FR8907231. It has the function of ensuring the maintenance of the projectile relative to the case of the ammunition and of sealing the combustion gases of the propellant charge.

La coiffe est destinée à se fragmenter à la sortie du tube de l'arme par l'action des efforts centrifuges qui s'exercent sur elle. Elle comprend une portion annulaire 16 dans laquelle sont aménagés des alésages borgnes 17, parallèles à l'axe 18 de la munition, qui fragilisent la coiffe et facilitent sa rupture.The cap is intended to fragment at the exit of the barrel from the weapon by the action of the centrifugal forces which are exerted on it. It comprises an annular portion 16 in which blind bores 17 are arranged, parallel to the axis 18 of the ammunition, which weaken the cap and facilitate its rupture.

Les alésages 17 sont régulièrement répartis angulairement, ils communiquent par des trous 20 avec une surface cylindrique externe 19 de la coiffe 14.The bores 17 are regularly distributed angularly, they communicate through holes 20 with an external cylindrical surface 19 of the cap 14.

Lorsque le projectile est positionné dans l'étui, les trous 20 sont obturés d'une façon simple par la surface cylindrique interne du renfort tubulaire 8 de la bague avant 4.When the projectile is positioned in the case, the holes 20 are closed in a simple way by the surface internal cylindrical of the tubular reinforcement 8 of the front ring 4.

Les alésages 17 constituent une zone de réception pour un appoint anti-usure 26 constitué par exemple par un mélange de dioxyde de titane et de cire qui est placé dans les alésages 17.The bores 17 constitute a receiving zone for an anti-wear makeup 26 constituted for example by a mixture of titanium dioxide and wax which is placed in the bores 17.

L'appoint pourra comprendre un matériau anti-usure associé à un liant avec une proportion relative de 30 à 50% de liant.The top-up may include an anti-wear material associated with a binder with a relative proportion of 30 to 50% of binder.

On pourra choisir comme matériau anti-usure le trioxyde de Tungstène, le talc ou le dioxyde de titane, et comme liant la cire.Tungsten trioxide, talc or titanium dioxide can be chosen as anti-wear material, and as a wax binding agent.

On pourra également utiliser une graisse.We can also use a grease.

Un opercule 21 en matière plastique est fixé par exemple par collage sur un lamage 22 aménagé sur la face avant de la bague 4.A plastic cover 21 is fixed for example by bonding to a counterbore 22 arranged on the front face of the ring 4.

Le projectile 10 porte également une couche avant 23 d'appoint anti-usure déposée sur une zone de réception du corps même de projectile et en avant de la ceinture 11.The projectile 10 also carries a front anti-wear add-on layer 23 deposited on a zone for receiving the same projectile body and in front of the belt 11.

Le projectile 10 porte aussi une couche arrière 24 d'appoint anti-usure déposée en arrière de la ceinture au niveau d'une zone de réception conique 25.The projectile 10 also carries a rear anti-wear back-up layer 24 deposited behind the belt at a conical reception zone 25.

Ces deux couches pourront également être constituées d'un mélange de cire et de dioxyde de titane ou être formées par le dépôt d'un autre type de matériau.These two layers may also consist of a mixture of wax and titanium dioxide or be formed by the deposition of another type of material.

Le matériau des couches avant et arrière d'appoint anti-usure sera mis en place par coulée après fusion et en faisant tourner le projectile pour répartir l'appoint régulièrement.The material of the front and rear anti-wear back-up layers will be put in place by casting after fusion and by rotating the projectile to distribute the back-up regularly.

Afin d'améliorer l'accrochage de l'appoint sur le corps du projectile on donnera à la surface de celui-ci une rugosité suffisante (par usinage ou attaque par un acide).In order to improve the attachment of the add-on to the body of the projectile, the surface thereof will be given sufficient roughness (by machining or attack by an acid).

Lors du tir de la munition, le projectile 10 portant sa coiffe 14 est poussé dans le tube de l'arme. Le déplacement de la coiffe entraîne le dégagement des trous 20.When firing the ammunition, the projectile 10 carrying its cap 14 is pushed into the barrel of the weapon. The displacement of the cap causes the holes 20 to be released.

L'appoint anti-usure 26, poussé par les efforts d'inertie longitudinale et centrifuge, peut alors sortir par les trous et se déposer dans le tube. Le dépôt maximal d'appoint est réalisé au niveau du tube où l'accélération de rotation est maximale, soit le plus souvent dans la deuxième moitié de la longueur du tube.The anti-wear supplement 26, pushed by the longitudinal and centrifugal inertia forces, can then exit through the holes and settle in the tube. Maximum deposit make-up is carried out at the level of the tube where the acceleration of rotation is maximum, that is most often in the second half of the length of the tube.

Suite à l'avancée du projectile dans le tube de l'arme, la couche avant d'appoint 23 vient se déposer sur le début des rayures et avant l'engagement de celles-ci par la ceinture.Following the advancement of the projectile in the barrel of the weapon, the additional front layer 23 is deposited on the beginning of the scratches and before the engagement of these by the belt.

La ceinture 11 vient ensuite engager le tube déjà recouvert du matériau protecteur.The belt 11 then engages the tube already covered with the protective material.

Tout au long du parcours du projectile dans le tube de l'arme un appoint anti-usure sera donc mis en place successivement ou conjointement par la couche avant 23 et par la coiffe 14.Throughout the course of the projectile in the barrel of the weapon, an anti-wear back-up will therefore be put in place successively or jointly by the front layer 23 and by the cap 14.

L'invention permet donc d'apporter un effet protecteur vis à vis de l'action du projectile qui est tiré.The invention therefore makes it possible to provide a protective effect with respect to the action of the projectile which is fired.

De plus l'invention permet d'apporter une action protectrice au niveau des deux points les plus sensibles à l'usure : le début de rayage où vient s'engager la ceinture et le point d'accélération de rotation maximale.In addition, the invention makes it possible to provide a protective action at the two points most sensitive to wear: the beginning of striping where the belt engages and the point of maximum rotation acceleration.

Le début de rayage est protégé par l'appoint provenant de la couche avant 23.The start of streaking is protected by the addition from the front layer 23.

Le point d'accélération de rotation maximale est protégé par l'appoint 26 déposé par la coiffe.The maximum rotation acceleration point is protected by the additional element 26 deposited by the cap.

La couche arrière d'appoint 24 disposée derrière la ceinture 11 permet de compléter le dépôt protecteur avant le tir des munitions suivantes. Le fait de lier cette couche au projectile permet d'assurer une répartition du matériau tout le long du tube.The rear booster layer 24 disposed behind the belt 11 makes it possible to complete the protective deposit before firing the following munitions. The fact of binding this layer to the projectile makes it possible to ensure a distribution of the material all along the tube.

Du fait de sa mise en place dans des trous régulièrement répartis angulairement, l'appoint 26 conservera une répartition régulière dans l'étui pendant tout le stockage de la munition.Due to its placement in regularly angularly distributed holes, the add-on 26 will maintain a regular distribution in the case during the entire storage of the ammunition.

A titre de variante il est possible de prévoir des matériaux différents pour l'appoint contenu dans la coiffe, celui mis en place dans la couche avant et celui de la couche arrière.As a variant, it is possible to provide different materials for the makeup contained in the cap, that put in place in the front layer and that of the rear layer.

On pourra par exemple utiliser :

  • comme matériau déposé par la coiffe une composition permettant de diminuer le frottement (telle une graisse),
  • comme matériau pour la couche avant une composition pour diminuer le frottement (telle une graisse) ou une composition anti-usure/anti-frottement comme le talc associé à la cire,
  • comme matériau pour la couche arrière un appoint anti-usure classique permettant de diminuer les effets érosifs des gaz propulsifs chauds (comme le dioxyde de titane ou le trioxyde de tungstène associés à la cire).
We could for example use:
  • as material deposited by the cap, a composition making it possible to reduce friction (such as a grease),
  • as a material for the layer before a composition for reducing friction (such as a grease) or an anti-wear / anti-friction composition such as talc associated with wax,
  • as a material for the rear layer, a conventional anti-wear supplement which makes it possible to reduce the erosive effects of hot propellant gases (such as titanium dioxide or tungsten trioxide associated with the wax).

Il est possible également de ne prévoir que le matériau contenu dans la coiffe ou que celui de la couche avant ou encore uniquement celui de la couche arrrière.It is also possible to provide only the material contained in the cap or that of the front layer or even only that of the rear layer.

A titre de variante il est possible de disposer dans l'alésage interne 37 de la coiffe 14 (en complément ou à la place du matériau 26 des alésages 17) un matériau anti-usure tel la graisse disposé ou non dans une poche en plastique.Alternatively it is possible to have in the internal bore 37 of the cap 14 (in addition to or in place of the material 26 of the bores 17) an anti-wear material such as grease disposed or not in a plastic pocket.

La figure 2 représente une munition télescopée dont l'étui 2 est fermé à sa partie arrière par un bouchon 3 et à sa partie avant par un autre bouchon formé par une bague 4. Le projectile 10 comporte un barreau sous-calibré 32 disposé dans un sabot 33 au calibre.FIG. 2 represents a telescoped munition whose case 2 is closed at its rear part by a plug 3 and at its front part by another plug formed by a ring 4. The projectile 10 comprises a sub-calibrated bar 32 placed in a shoe 33 caliber.

Le barreau sous-calibré porte un empennage 27 à sa partie arrière. La ceinture 11 est en appui contre la bague avant 4. Le projectile est maintenu axialement et radialement par rapport à l'étui par des moyens de maintien qui pourront comprendre une cale arrière 28 et un anneau élastique engagé dans la bague avant (non représenté ici).The sub-calibrated bar carries a tail unit 27 at its rear part. The belt 11 bears against the front ring 4. The projectile is held axially and radially relative to the case by holding means which may include a rear wedge 28 and an elastic ring engaged in the front ring (not shown here ).

Les brevets FR2647891 et FR2679991 décrivent en détail de tels moyens de maintien.The patents FR2647891 and FR2679991 describe in detail such holding means.

Le sabot 33 du projectile porte un appoint anti-usure 26 déposé dans une poche avant 29 qui constitue ainsi une zone de réception pour l'appoint. L'appoint est mis en place par coulée. Un paillet protecteur pourra être mis en place après dépôt de l'appoint dans la poche pour assurer son maintien en couche symétrique au cours des phases de stockage.The shoe 33 of the projectile carries an anti-wear back-up 26 deposited in a front pocket 29 which thus constitutes a reception area for the back-up. The backup is put in place by casting. A protective straw can be put in place after depositing the extra in the pocket to ensure its maintenance in a symmetrical layer during the storage phases.

Le sabot porte également une couche arrière 24 d'appoint anti-usure déposée sur une zone de réception externe du sabot en arrière de la ceinture.The shoe also carries a rear anti-wear backing layer 24 deposited on an area for receiving the shoe externally behind the belt.

La bague avant 4 est obturée par un opercule 21 collé au niveau d'un lamage 22. L'opercule porte un prolongement cylindrique 30 présentant un logement interne 31 qui constitue une zone de réception pour un appoint anti-usure 26.The front ring 4 is closed by a cover 21 bonded at the level of a counterbore 22. The cover carries a cylindrical extension 30 having an internal housing 31 which constitutes a reception area for anti-wear back-up 26.

Un paillet de fermeture pourra être mis en place après dépôt de l'appoint pour assurer son maintien dans l'opercule en couche symétrique.A closing straw can be put in place after depositing the extra to ensure its maintenance in the cover in a symmetrical layer.

L'opercule est rompu par le projectile lors de la mise à feu de la munition, et l'appoint 26 qu'il contient se trouve réparti dans le tube à l'avant du projectile et entraîné par celui-ci.The cover is broken by the projectile when the ammunition is fired, and the make-up 26 which it contains is distributed in the tube at the front of the projectile and driven by it.

Les appoints disposés dans l'opercule et dans la poche avant du sabot se répandront tout au long du parcours du projectile dans le tube. L'appoint de l'opercule se répandra notamment dès le début du tube et il joue le rôle de l'appoint de la couche avant décrite précédemment en référence à la figure 1 (il pourra être constitué par de la graisse ou un mélange talc/cire).The add-ons placed in the cover and in the front pocket of the shoe will spread throughout the course of the projectile in the tube. The addition of the cover will spread in particular from the start of the tube and it plays the role of the addition of the front layer described previously with reference to FIG. 1 (it may consist of grease or a talc / mixture wax).

L'appoint de la poche 29 se mettra en place plus progressivement le long du tube et de façon maximale dans la deuxième moitié de celui-ci lorsque le tir est effectué avec un tube rayé. Il joue le rôle de l'appoint de coiffe décrit précédemment et sera de préférence constitué par de la graisse.The addition of the pocket 29 will take place more gradually along the tube and as much as possible in the second half of the latter when the shot is taken with a striped tube. It plays the role of the cap addition described above and will preferably consist of grease.

L'appoint de la couche arrière pourra comporter du dioxyde de titane, du trioxyde de tungstène ou du talc.Addition of the rear layer may include titanium dioxide, tungsten trioxide or talc.

La figure 3 représente aussi une munition télescopée dont l'étui 2 est fermé à sa partie arrière par un bouchon 3 et à sa partie avant par une bague 4 obturée par un opercule 21 en matière plastique.Figure 3 also shows a telescoped munition whose case 2 is closed at its rear part by a plug 3 and at its front part by a ring 4 closed by a cover 21 made of plastic.

Le projectile 10 comporte un barreau sous-calibré 32 disposé dans un sabot 33 au calibre. Le projectile est ici gyrostabilisé et le sabot présente un fond 33a réalisé par exemple en acier et sur lequel est surmoulée une chemise 33b réalisée en matière plastique.The projectile 10 comprises a sub-calibrated bar 32 disposed in a shoe 33 of the caliber. The projectile is here gyro-stabilized and the shoe has a bottom 33a produced by example in steel and on which a jacket 33b made of plastic is overmolded.

Des créneaux (non représentés) sont prévus entre le fond et la chemise. On pourra par exemple se reporter au brevet FR2653873 qui décrit un tel projectile.Slots (not shown) are provided between the bottom and the shirt. We can for example refer to patent FR2653873 which describes such a projectile.

La ceinture 11 est en appui contre la bague avant 4, le guidage du projectile dans la bague est également assuré par des portées cylindriques 34 et 35. Une gorge périphérique 36 est aménagée sur la chemise 33b du sabot 33 en avant de la ceinture 11.The belt 11 is in abutment against the front ring 4, the guiding of the projectile in the ring is also ensured by cylindrical surfaces 34 and 35. A peripheral groove 36 is arranged on the jacket 33b of the shoe 33 in front of the belt 11.

Cette gorge est délimitée par les portées 34 et 35, elle est destinée à aléger le sabot et faciliter son éclatement à la sortie du tube de l'arme. Elle constitue une zone de réception pour un appoint anti-usure 26.This groove is delimited by the ranges 34 and 35, it is intended to lighten the hoof and facilitate its bursting at the outlet of the barrel of the weapon. It constitutes a reception area for anti-wear back-up 26.

Après montage du projectile dans la bague avant 4, l'appoint anti-usure se trouve maintenu par la surface cylindrique interne de la bague et il conserve une répartition régulière dans l'étui pendant tout le stockage de la munition.After mounting the projectile in the front ring 4, the anti-wear back-up is maintained by the internal cylindrical surface of the ring and it maintains a regular distribution in the case during the entire storage of the ammunition.

L'appoint déposé dans la gorge joue le rôle de l'appoint de la couche avant décrit précédemment en référence à la figure 1 (il pourra être constitué par de la graisse ou un mélange talc/cire). Cet appoint se répand notamment dès le début du tube et avant engagement de la ceinture.The filling deposited in the throat plays the role of adding the front layer described above with reference to FIG. 1 (it may consist of grease or a talc / wax mixture). This supplement spreads in particular from the start of the tube and before engagement of the belt.

Le sabot 33 du projectile porte aussi un appoint anti-usure 26 déposé dans une zone de réception qui est une poche avant 29. Cet appoint joue le rôle de l'appoint de coiffe décrit précédemment en référence à la figure 1. Il se répandra progressivement le long du tube et de façon maximale dans la deuxième moitié de celui-ci suite aux efforts centrifuges développés (il sera de préférence constitué par de la graisse).The shoe 33 of the projectile also carries an anti-wear supplement 26 deposited in a reception area which is a front pocket 29. This supplement plays the role of the cap addition described previously with reference to FIG. 1. It will gradually spread along the tube and as much as possible in the second half of it following the centrifugal forces developed (it will preferably consist of grease).

Le sabot porte enfin une couche arrière 24 d'appoint anti-usure déposée sur une zone de réception conique du fond 33a du sabot en arrière de la ceinture. Cet appoint pourra comporter du dioxyde de titane, du trioxyde de tungstène ou du talc. Il diminue les effets érosifs des gaz chauds.The shoe finally carries a rear anti-wear backing layer 24 deposited on a conical reception area of the bottom 33a of the shoe behind the belt. This top-up may include titanium dioxide, tungsten trioxide or talc. It reduces the erosive effects of hot gases.

A titre de variante il est possible de remplacer la gorge 36 par plusieurs logements aménagés radialement dans la chemise 33b et régulièrement répartis angulairement (voir par exemple les logements décrits dans le brevet FR2653873).As a variant, it is possible to replace the groove 36 with several housings arranged radially in the jacket 33b and regularly distributed angularly (see for example the housings described in patent FR2653873).

Il est bien entendu possible de combiner les différents modes de réalisation décrits précédemment et notamment d'utiliser un opercule du type de celui représenté figure 2 dans les munitions représentées aux figures 1 et 3.It is of course possible to combine the various embodiments described above and in particular to use a cover of the type shown in FIG. 2 in the ammunition shown in FIGS. 1 and 3.

Le mode de réalisation de la figure 3 peut également être mis en oeuvre avec un projectile non télescopé.The embodiment of Figure 3 can also be implemented with a non-telescoped projectile.

Dans ce cas l'étui sera serti sur une gorge du projectile disposée en arrière de la ceinture. Le projectile portera une couche arrière 24 d'un appoint anti-usure diminuant les effets érosifs des gaz (dioxyde de titane ou trioxyde de tungstène associés à la cire). Il portera également dans la gorge périphérique 36 (en avant de la ceinture) un appoint anti-usure et/ou anti-frottement comme le talc associé à la cire. Cet appoint sera répandu dans le tube de l'arme dès le début du tube et avant engagement de la ceinture.In this case, the case will be crimped onto a groove of the projectile disposed behind the belt. The projectile will carry a rear layer 24 of an anti-wear supplement reducing the erosive effects of the gases (titanium dioxide or tungsten trioxide associated with the wax). It will also carry in the peripheral groove 36 (in front of the belt) an anti-wear and / or anti-friction booster like the talc associated with the wax. This extra will be spread in the barrel of the weapon from the beginning of the barrel and before engagement of the belt.

Le projectile pourra porter enfin un appoint anti-usure 26 déposé dans la poche avant 29. Cet appoint sera un matériau diminuant le frottement (tel une graisse), et de part sa disposition dans la poche 29, il sera réparti de façon maximale dans la deuxième moitié du tube.The projectile can finally carry an anti-wear makeup 26 deposited in the front pocket 29. This makeup will be a material reducing friction (such as a grease), and due to its arrangement in the pocket 29, it will be distributed as much as possible in the second half of the tube.

Du fait du caractère non télescopé de la munition, les appoints disposés dans la gorge 36 et/ou dans la poche 29 seront protégés par des paillets.Due to the non-telescoped nature of the ammunition, the add-ons arranged in the groove 36 and / or in the pocket 29 will be protected by spangles.

Claims (11)

1 - Munition (1) comportant un étui (2) contenant un chargement propulsif et un projectile (10), présentant un corps et une ceinture d'étanchéité (11) aux gaz propulsifs, le projectile étant télescopé à l'intérieur de l'étui, munition caractérisée en ce qu' un appoint anti-usure (26) est disposé au niveau d'au moins une zone de réception solidaire du projectile (10) ou d'un bouchon de l'étui susceptible d'être entraîné par le projectile lors du tir. 1 - Ammunition (1) comprising a case (2) containing a propellant charge and a projectile (10), having a body and a sealing belt (11) for propellant gases, the projectile being telescoped inside the case, ammunition characterized in that an anti-wear back-up (26) is disposed at the level of at least one receiving zone secured to the projectile (10) or to a cap of the case capable of being driven by the projectile when fired. 2 - Munition (1) selon la revendication 1, et dans laquelle le projectile est maintenu par une coiffe (14), solidaire du projectile et ajustée dans une bague avant (4) fermant l'étui, munition caractérisée en ce que l'appoint anti-usure (26) est disposé au niveau d'au moins une zone de réception portée par la coiffe (14) et se trouve donc entraîné par le projectile lors du tir. 2 - Ammunition (1) according to claim 1, and wherein the projectile is held by a cap (14), integral with the projectile and adjusted in a front ring (4) closing the case, ammunition characterized in that the add-on anti-wear (26) is disposed at at least one receiving zone carried by the cap (14) and is therefore driven by the projectile during firing. 3 - Munition selon la revendication 2, caractérisée en ce que la coiffe (14) présente une zone annulaire dans laquelle sont aménagés au moins deux alésages (17) parallèles à l'axe de la munition et régulièrement répartis angulairement, les alésages communiquant avec une surface cylindrique externe de la coiffe (14) par des trous (20) et en ce que l'appoint anti-usure (26) est placé dans les alésages (17). 3 - Ammunition according to claim 2, characterized in that the cap (14) has an annular zone in which are arranged at least two bores (17) parallel to the axis of the ammunition and regularly distributed angularly, the bores communicating with a external cylindrical surface of the cap (14) through holes (20) and in that the anti-wear back-up (26) is placed in the bores (17). 4 - Munition (1) selon la revendication 1 et dans laquelle le projectile comporte un barreau sous-calibré (32) disposé dans un sabot (33) au calibre, caractérisé en ce que l'appoint anti-usure (26) est disposé au niveau d'au moins une zone de réception qui comprend une poche avant (29) aménagée sur le sabot (33), l'appoint se trouvant donc entraîné par le projectile lors du tir. 4 - Ammunition (1) according to claim 1 and wherein the projectile comprises an under-calibrated bar (32) disposed in a shoe (33) to the caliber, characterized in that the anti-wear supplement (26) is disposed at level of at least one reception area which comprises a front pocket (29) arranged on the shoe (33), the add-on therefore being driven by the projectile during firing. 5 - Munition (1) selon la revendication 1 et dans laquelle le projectile comporte un barreau sous-calibré (32) disposé dans un sabot (33) au calibre, caractérisé en ce que l'appoint anti-usure (26) est disposé au niveau d'au moins une zone de réception qui comprend au moins un logement périphérique (36) aménagé sur le sabot en avant de la ceinture (11), l'appoint se trouvant donc entraîné par le projectile lors du tir. 5 - Ammunition (1) according to claim 1 and wherein the projectile comprises an under-calibrated bar (32) disposed in a shoe (33) to the caliber, characterized in that the anti-wear supplement (26) is disposed at level of at least one reception area which comprises at least one peripheral housing (36) arranged on the shoe in front of the belt (11), the booster therefore being driven by the projectile during firing. 6 - Munition (1) selon la revendication 1 et dans laquelle l'étui est fermé par un bouchon formé par une bague avant (4) obturée de façon étanche par un opercule (21), munition caractérisée en ce que l'appoint anti-usure (26) est disposé au niveau d'au moins une zone de réception qui comprend l'opercule (21), l'appoint se trouvant donc entraîné par le projectile lors du tir. 6 - Ammunition (1) according to claim 1 and wherein the case is closed by a plug formed by a front ring (4) closed in leaktight manner by a cover (21), ammunition characterized in that the anti-additive wear (26) is arranged at at least one receiving zone which includes the cover (21), the make-up being therefore driven by the projectile during the firing. 7 - Munition selon une des revendications 1 à 6, caractérisé en ce qu'une couche avant (23) d'appoint anti-usure est déposée sur au moins une zone de réception qui est le corps même du projectile (10) en avant de la ceinture (11). 7 - Ammunition according to one of claims 1 to 6, characterized in that a front layer (23) of anti-wear back-up is deposited on at least one receiving zone which is the body of the projectile (10) in front of the belt (11). 8 - Munition selon une des revendications 1 à 7, caractérisé en ce qu'une couche arrière (24) d'appoint anti-usure est déposée sur au moins une zone de réception qui est le corps même du projectile (10) en arrière de la ceinture (11). 8 - Ammunition according to one of claims 1 to 7, characterized in that a rear anti-wear backing layer (24) is deposited on at least one receiving zone which is the very body of the projectile (10) behind the belt (11). 9 - Munition (1) comportant un étui (2) contenant un chargement propulsif et un projectile (10), présentant un corps et une ceinture d'étanchéité (11) aux gaz propulsifs, munition caractérisée en ce qu'elle comporte au moins deux zones de réception portant un appoint anti-usure, zones solidaires du projectile (10) ou susceptibles d'être entraînées par lui lors du tir, les matériaux constituant les appoints anti-usure déposés dans chacune des deux zones de réception étant de natures différentes. 9 - Ammunition (1) comprising a case (2) containing a propellant charge and a projectile (10), having a body and a sealing belt (11) for propellant gases, ammunition characterized in that it comprises at least two reception areas carrying an anti-wear back-up, areas integral with the projectile (10) or liable to be entrained by it during the firing, the materials constituting the anti-wear back-ups deposited in each of the two reception areas being of different natures. 10 - Munition selon la revendications 9, caractérisée en ce qu'une zone de réception se trouve en avant de la ceinture et l'autre en arrière de la ceinture. 10 - Ammunition according to claim 9, characterized in that a receiving zone is located in front of the belt and the other behind the belt. 11 - Munition selon la revendication 10, caractérisée en ce que le ou les matériaux disposés en avant de la ceinture sont des compositions permettant de diminuer le frottement et/ou l'usure et le ou les matériaux disposés en arrière de la ceinture sont des compositions diminuant les effets érosifs des gaz chauds. 11 - Ammunition according to claim 10, characterized in that the material or materials placed in front of the belt are compositions making it possible to reduce friction and / or wear and the material or materials placed behind the belt are compositions reducing the erosive effects of hot gases.
EP19950400557 1994-03-16 1995-03-15 Ammunition with anti-wear additives Expired - Lifetime EP0674150B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9403064A FR2717570B1 (en) 1994-03-16 1994-03-16 Ammunition with anti-wear back-up.
FR9403064 1994-03-16

Publications (2)

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EP0674150A1 true EP0674150A1 (en) 1995-09-27
EP0674150B1 EP0674150B1 (en) 1999-01-20

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EP (1) EP0674150B1 (en)
DE (1) DE69507356T2 (en)
FR (1) FR2717570B1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR672702A (en) * 1928-07-19 1930-01-06 Schneider Et Cie Device for lubricating the core of guns by the action of the projectile on the scratches
FR766414A (en) * 1934-10-27 1934-06-28 Projectile casing with compressible and lubricating chamber
FR825752A (en) * 1937-08-19 1938-03-14 Automatic lubrication of cannon tubes and shells arranged to obtain this result
US3148620A (en) * 1959-08-14 1964-09-15 Wegematic Corp Wear reduction additives
US4715284A (en) * 1986-11-24 1987-12-29 Ford Aerospace & Communications Corp. Telescoped ammunition construction for reducing barrel erosion
FR2647891A1 (en) * 1989-06-01 1990-12-07 France Etat Armement DEVICE FOR MAINTAINING A SUB-CALIBER PROJECTILE RELATING TO THE ENVELOPE OF TELESCOPED MUNITION
DE4018386A1 (en) * 1990-06-08 1991-12-12 Rheinmetall Gmbh Segmented drive cage for sub-calibre shell - has recesses contg. barrel wear-reducing additive
FR2679991A1 (en) * 1991-07-31 1993-02-05 Giat Ind Sa IMPROVEMENTS PROVIDED FOR AMMUNITION IN PARTICULAR OF THE TELESCOPE TYPE.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR672702A (en) * 1928-07-19 1930-01-06 Schneider Et Cie Device for lubricating the core of guns by the action of the projectile on the scratches
FR766414A (en) * 1934-10-27 1934-06-28 Projectile casing with compressible and lubricating chamber
FR825752A (en) * 1937-08-19 1938-03-14 Automatic lubrication of cannon tubes and shells arranged to obtain this result
US3148620A (en) * 1959-08-14 1964-09-15 Wegematic Corp Wear reduction additives
US4715284A (en) * 1986-11-24 1987-12-29 Ford Aerospace & Communications Corp. Telescoped ammunition construction for reducing barrel erosion
FR2647891A1 (en) * 1989-06-01 1990-12-07 France Etat Armement DEVICE FOR MAINTAINING A SUB-CALIBER PROJECTILE RELATING TO THE ENVELOPE OF TELESCOPED MUNITION
DE4018386A1 (en) * 1990-06-08 1991-12-12 Rheinmetall Gmbh Segmented drive cage for sub-calibre shell - has recesses contg. barrel wear-reducing additive
FR2679991A1 (en) * 1991-07-31 1993-02-05 Giat Ind Sa IMPROVEMENTS PROVIDED FOR AMMUNITION IN PARTICULAR OF THE TELESCOPE TYPE.

Also Published As

Publication number Publication date
FR2717570B1 (en) 1996-05-10
FR2717570A1 (en) 1995-09-22
DE69507356T2 (en) 1999-06-02
DE69507356D1 (en) 1999-03-04
EP0674150B1 (en) 1999-01-20

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