EP0674150A1 - Munition mit Anti-Verschleissmittel - Google Patents

Munition mit Anti-Verschleissmittel 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
Authority
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
Other languages
English (en)
French (fr)
Other versions
EP0674150B1 (de
Inventor
Roland Boual
Michel Desevaux
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.)
CTA International SAS
Original Assignee
CTA International SAS
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 CTA International SAS filed Critical CTA International SAS
Publication of EP0674150A1 publication Critical patent/EP0674150A1/de
Application granted granted Critical
Publication of EP0674150B1 publication Critical patent/EP0674150B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubricants (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
EP19950400557 1994-03-16 1995-03-15 Munition mit Anti-Verschleissmittel Expired - Lifetime EP0674150B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9403064 1994-03-16
FR9403064A FR2717570B1 (fr) 1994-03-16 1994-03-16 Munition comportant un appoint anti-usure.

Publications (2)

Publication Number Publication Date
EP0674150A1 true EP0674150A1 (de) 1995-09-27
EP0674150B1 EP0674150B1 (de) 1999-01-20

Family

ID=9461102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950400557 Expired - Lifetime EP0674150B1 (de) 1994-03-16 1995-03-15 Munition mit Anti-Verschleissmittel

Country Status (3)

Country Link
EP (1) EP0674150B1 (de)
DE (1) DE69507356T2 (de)
FR (1) FR2717570B1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR672702A (fr) * 1928-07-19 1930-01-06 Schneider Et Cie Dispositif pour la lubrification de l'âme des canons par l'action du projectile surles rayures
FR766414A (fr) * 1934-10-27 1934-06-28 Enveloppe pour projectile avec chambre compressible et lubrifiante
FR825752A (fr) * 1937-08-19 1938-03-14 Graissage automatique des tubes de canons et obus disposés pour obtenir ce résultat
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 (fr) * 1989-06-01 1990-12-07 France Etat Armement Dispositif de maintien d'un projectile sous-calibre relativement a l'enveloppe d'une munition telescopee
DE4018386A1 (de) * 1990-06-08 1991-12-12 Rheinmetall Gmbh Segmentierter treibkaefig mit additiv
FR2679991A1 (fr) * 1991-07-31 1993-02-05 Giat Ind Sa Perfectionnements apportes a une munition en particulier du type telescope.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR672702A (fr) * 1928-07-19 1930-01-06 Schneider Et Cie Dispositif pour la lubrification de l'âme des canons par l'action du projectile surles rayures
FR766414A (fr) * 1934-10-27 1934-06-28 Enveloppe pour projectile avec chambre compressible et lubrifiante
FR825752A (fr) * 1937-08-19 1938-03-14 Graissage automatique des tubes de canons et obus disposés pour obtenir ce résultat
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 (fr) * 1989-06-01 1990-12-07 France Etat Armement Dispositif de maintien d'un projectile sous-calibre relativement a l'enveloppe d'une munition telescopee
DE4018386A1 (de) * 1990-06-08 1991-12-12 Rheinmetall Gmbh Segmentierter treibkaefig mit additiv
FR2679991A1 (fr) * 1991-07-31 1993-02-05 Giat Ind Sa Perfectionnements apportes a une munition en particulier du type telescope.

Also Published As

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

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