EP0268535B1 - Drehbarer Führungsring für Geschosse jeden Kalibers - Google Patents

Drehbarer Führungsring für Geschosse jeden Kalibers Download PDF

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Publication number
EP0268535B1
EP0268535B1 EP87402608A EP87402608A EP0268535B1 EP 0268535 B1 EP0268535 B1 EP 0268535B1 EP 87402608 A EP87402608 A EP 87402608A EP 87402608 A EP87402608 A EP 87402608A EP 0268535 B1 EP0268535 B1 EP 0268535B1
Authority
EP
European Patent Office
Prior art keywords
projectile
belt
opening
obturator
ring
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.)
Expired - Lifetime
Application number
EP87402608A
Other languages
English (en)
French (fr)
Other versions
EP0268535A1 (de
Inventor
Jean-Claude Sauvestre
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.)
Giat Industries SA
Original Assignee
Direction General pour lArmement DGA
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 Direction General pour lArmement DGA filed Critical Direction General pour lArmement DGA
Priority to AT87402608T priority Critical patent/ATE54365T1/de
Publication of EP0268535A1 publication Critical patent/EP0268535A1/de
Application granted granted Critical
Publication of EP0268535B1 publication Critical patent/EP0268535B1/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
    • F42B14/02—Driving bands; Rotating bands

Definitions

  • the technical sector of the present invention is that of windbreaking belts equipping projectiles of any caliber fired using a rifled barrel tube.
  • slip belt The concept of the slip belt is that which is used both in France and abroad to allow the firing of kinetic energy ammunition, of the arrow type, and this, from heavily striped tubes.
  • the non-slip belts developed for currently known arrow munitions are made of plastic and are mounted on the projectile by hot deformation. After cooling, these belts rotate freely on the projectile with a residual play that is difficult to reproduce due to the passage of the material in permanent deformation since its mechanical properties are modified.
  • patents US-A-4,187,783 and DE-A-2,331,158 In the American patent, a belt is provided for an arrow projectile on which a sealing layer is applied, capable of sliding one with respect to the other to reduce the rotation of the projectile.
  • the tightness in the tube must be ensured at the level of the belt so as not to degrade the performance of the weapon system.
  • Means annexed to the belt have been proposed to ensure this tightness, consisting of a bead linked to the belt by a complex structure.
  • Patent FR-A 2 331 771 describes a tailed projectile provided with a sliding guide ring, rotatably mounted on the body of the projectile. It is above all a question of overcoming the great precision necessary for assembly by providing a ring in three parts, maintained until firing by a safety lock. This ring is mounted in a sliding cage or placed in its housing with a certain clearance. However, the production of the ring in three parts, made of sintered metal, does not prevent sealing between the projectile and the tube of the weapon.
  • Patent FR-A 1 093 020 relates to means for reducing the rotation of a projectile by providing a slip belt mounted between two parts of a munition joined axially by screwing.
  • reducing gyration requires taking into account a number of factors that are difficult to control. Indeed, the very design of the ammunition is different and requires delicate machining in order to adapt this belt.
  • the belt is mounted in a recess and the walls of the latter are graphitized or coated with an anti-friction material to facilitate sliding.
  • a sliding ring is provided between the belt and the projectile, the belt then being a free ring.
  • the belt is made of sintered metal and has no teeth on its internal surface.
  • the purpose of the present invention is therefore to avoid the drawbacks mentioned above by proposing a slip belt transmitting only a small rotation to the projectile by increasing the radial clearance between the belt and the projectile during the launching phase of the latter. ci, while ensuring the tightness in the barrel of the weapon.
  • the invention therefore relates to a device constituting a slip belt for projectile fired in a striped tube, consisting of a ring disposed in a housing formed on the projectile, a grain before placed against the anterior edge of the housing, a plastic body belt placed in the housing and an axial locking means of the body in the housing, characterized in that this body has circular teeth in contact with the ring.
  • the outside diameter of the belt body can be substantially greater than the diameter of the stripes in the tube.
  • the belt body may be provided with a rear skirt which is not adherent to the projectile, comprising a groove for crimping the shell of the ammunition.
  • the axial locking means may consist of radial pins fixed on the projectile, a grain being placed between the rear face of the body and the pins.
  • the locking means can be constituted by a circular flange of the projectile.
  • the belt body can be made up of two identical sectors joined by assembly screws.
  • the front grain can be in the form of a disc.
  • the front grain can be in the form of a disc provided with a frustoconical inner lip.
  • the diameter of the front grain may be less than that of the projectile, so as to provide a free space between the front of the belt body and the front edge of the housing.
  • the total surface of the tooth contacts can be equal to or less than 25% of the surface of the ring.
  • An advantage of the present invention lies in the fact that the radial clearance between the belt and the projectile is constant and reproducible from one munition to another, which does not affect the performance of the weapon system.
  • Another advantage lies in the fact that the mounting operations involve only the elastic deformations of the material constituting the belt body.
  • Another advantage is that this game is kept in a temperature range of - 40 ° C to + 63 ° C.
  • this belt can be applied to any type of ammunition whether it is small, medium or large caliber.
  • FIG. 1 Partially diagrammatically shown in FIG. 1 is an arrow projectile conventionally constituted by a launch shoe 1 and an arrow not shown.
  • This projectile is placed in the barrel of the weapon at the level of the chamber 3 and the forcing cone 4.
  • the projectile comprises a housing 5 on which is placed a ring 6 and at the front a grain 7a having the form a disc with a frustoconical inner lip.
  • a belt body 8 provided with teeth 9 is placed in contact with the ring 6 and bears on the front grain 7a.
  • These teeth 9 are, in the figures, in the form of a V, but they could also be in the form of a U. They can be produced in the form of a single helical groove, or alternatively in the form of parallel grooves.
  • the total contact surface of the teeth is less than or equal to 25% of the surface of the ring 8.
  • the belt 8 is extended rearwards by a skirt 10 without contact with the projectile 1.
  • This skirt carries a circular groove 11 in which the sleeve 12 is crimped by constriction as shown by arrow A.
  • Pawns 13 fixed radially in the projectile shoe limit rearward movement of the belt.
  • a rear grain 7b can be placed between the rear face of the body 8 and the pins 13 so as to facilitate the sliding of the belt.
  • Radial holes 14 made in the groove 11 allow the passage of the pins 13.
  • the belt can be retained using six pins arranged regularly over a diameter of the projectile. In the figure, it can be seen that the external diameter (a) of the belt is slightly greater than the diameter (b) of the stripes 15 on the tube, that is to say from 1 to 2 mm.
  • the structure described above makes it possible to ensure mechanical mounting of the various elements, that is to say without deformation.
  • the front grain 7a is first placed against the front face 15 of the housing 5, then the ring 6 is threaded onto the projectile and finally the belt body 8 is placed around the ring 6 and against the grain 7a with a very slight Tightening.
  • the rear grain 7b is placed and the pins 13 are then fixed, then the sleeve.
  • a free space 7c can be provided between the grain 7a and the ring 6 and / or 7d between the grain 7b and the pins 13.
  • FIG. 2 an alternative embodiment different from the previous embodiment is shown by the depth p 2 of the housing 5 which is greater than the value p i shown in FIG. 1.
  • the thickness of the belt 8 is greater and a space 16 is provided between the front of this belt and the projectile.
  • the displacement of the contact zone of the belt 8 towards the axis of the projectile thus makes it possible, at equal pressure, to reduce the driving torque of the projectile in rotation by reducing the mean radius of the front grain.
  • the mounting of the front grain 7a, the ring 6 and the belt 8 is strictly identical to that of the previous mode. Note that the grain 7a is in the form of a disc.
  • FIG 3 there is shown an embodiment of the belt according to the invention in which the pins are replaced by a circular flange 17 of the projectile defining a housing of the belt body.
  • the skirt 10 has no radial perforation and the sleeve 12 is crimped in the groove 11.
  • This structure requires mounting of the grain 7a, of the ring 6 and of the belt by elastic and not permanent deformation on the projectile. In this configuration, no rear grain is placed between the body and the collar.
  • the belt body 8 is very thick on the order of 20 mm, to allow good scratching and to avoid too much tightening at the level of the projectile. Note that the thickness commonly used in this technical field is around 8 mm.
  • the belt 8 is made of conventional plastic material of the polyamide type and has a cone which matches the forcing cone of the tube.
  • the front grains 7a and rear 7b can be made of material of the polypropylene or low density polyethylene type, the material constituting the front grain preferably being of a lower Shore hardness than that of the rear grain.
  • the front grain 7a is made of a very flexible material with a Shore hardness of the order of 10 to 20 and a density of the order of 50 Kf / m 3 to ensure a limitation of the projectile rotation drive.
  • the ring 6 made of plastic of the polypropylene type on the one hand, participates in the locking of the elements of the shoe applied to the arrow, constituting the projectile, and on the other hand, limits the driving in rotation of the projectile. Finally, the stop pins 13 (two per shoe element) or the flange 17 retain the belt when taking scratches and allow the locking of the projectile in translation during handling.
  • the speed of rotation transmitted to the projectile is approximately 70 to 80 revolutions / s whereas with a conventional belt the speed transmitted is approximately 560 revolutions / s.
  • an assembly mode of the belt body 8 may include a number of sectors and in particular two half-shells 18 and 19 assembled by two screws 20 fixed in their thickness. This embodiment allows the belt to be mounted on the projectile described in Figure 3 without deformation.
  • the housing 5 is formed directly on the body of the projectile.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Belt Conveyors (AREA)
  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Measurement Of Force In General (AREA)
  • Fishing Rods (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (10)

1. Vorrichtung, die ein gleitendes Führungsband für ein in einem gezogenen Rohr verschossenes Geschoß darstellt und aus einem in einer Aufnahme (5) des Geschoßkörpers eingelegten Ring (6), einem gegen den vorausgehenden Rand der Aufnahme angeordneten vorderen Paßstück (7a), einem in der Aufnahme eingezogenen Führungsbandkörper (8) aus Kunststoff sowie aus einem axialen Mittel (13, 17) zur Verriegelung des Führungsbandkörpers in der Aufnahme besteht, dadurch gekennzeichnet, daß der Führungsbandkörper (8) rillenförmige Verzahnungen aufweist, die mit dem Ring in Berührung kommen.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der äußere Durchmesser des Führungsbandkörpers (8) merklich größer als der Durchmesser über den Zügen ist und daß die Verzahnung rillenförmig ausgebildet ist.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Führungsbandkörper (8) mit einem hinteren Mantel (10) versehen ist, der nicht mit dem Geschoßkörper in Berührung kommt und eine Fuge (11) für das Würgen der Munitionshülse (12) aufweist.
4. Vorrichtung nach einem beliebigen Anspruch 1 bis 3, dadurch gekennzeichnet, daß das axiale Verriegelungsmittel aus auf dem Geschoßkörper radial angeordneten Stiften (13) besteht, wobei ein Paßstück (7b) zwischen dem hinteren Bund (8) des Geschoßes und den Stiften (13) eingelegt wird.
5. Vorrichtung nach einem beliebigen Anspruch 1 bis 3, dadurch gekennzeichnet, daß das axiale Verriegelungsmittel aus einem umlaufenden Kragen (17) des Geschoßes besteht.
6. Vorrichtung nach einem beliebigen Anspruch 1 bis 5, dadurch gekennzeichnet, daß der Führungsbandkörper (8) aus zwei identischen Teilen (18, 19) besteht, die miteinander mittels Schrauben (20) verbunden sind.
7. Vorrichtung nach einem beliebigen Anspruch 1 bis 6, dadurch gekennzeichnet, daß das vordere Paßstück (7a) scheibenförmig ausgelegt ist.
8. Vorrichtung nach einem beliebigen Anspruch 1 bis 6, dadurch gekennzeichnet, daß das vordere Paßstück (7a) als Scheibe mit einer inneren kegelförmigen Lippe ausgelegt ist.
9. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß der Durchmesser des vorderen Paßstückes (7a) kleiner als der Durchmesser des Geschoßes ist, damit ein freier Raum (16) zwischen der vorderen Seite des Führungsbandkörpers (8) und der hinteren Seite der Aufnahme (5) entsteht.
10. Anwendung der Vorrichtung nach einem beliebigen vorherigen Anspruch auf den Verschuß von Geschoßen mit einem sehr geringen Längsträgheitsmoment mittels eines stark gezogenen Waffenrohres.
EP87402608A 1986-11-19 1987-11-19 Drehbarer Führungsring für Geschosse jeden Kalibers Expired - Lifetime EP0268535B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402608T ATE54365T1 (de) 1986-11-19 1987-11-19 Drehbarer fuehrungsring fuer geschosse jeden kalibers.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8616066 1986-11-19
FR8616066A FR2606869B1 (fr) 1986-11-19 1986-11-19 Ceinture derapante pour projectile de tout calibre

Publications (2)

Publication Number Publication Date
EP0268535A1 EP0268535A1 (de) 1988-05-25
EP0268535B1 true EP0268535B1 (de) 1990-07-04

Family

ID=9340962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402608A Expired - Lifetime EP0268535B1 (de) 1986-11-19 1987-11-19 Drehbarer Führungsring für Geschosse jeden Kalibers

Country Status (5)

Country Link
EP (1) EP0268535B1 (de)
AT (1) ATE54365T1 (de)
DE (1) DE3763578D1 (de)
ES (1) ES2016379B3 (de)
FR (1) FR2606869B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2665761B1 (fr) * 1990-08-13 1994-09-16 Giat Ind Sa Ceinture d'etancheite pour projectile fleche.
FR2670880B1 (fr) * 1990-12-19 1993-03-26 Giat Ind Sa Ceinture derapante pour projectile de tout calibre et son procede de realisation.
FR2721701B1 (fr) * 1994-06-28 1996-08-14 Giat Ind Sa Empennage pour projectile, notamment pour projectile sous-calibré supersonique.
FR2732456B1 (fr) * 1995-04-03 1997-05-16 Giat Ind Sa Amorces de rupture de ceinture pour projectile fleche
FR2768809B1 (fr) 1997-09-24 1999-10-15 Giat Ind Sa Projectile d'artillerie de campagne de gros calibre a longue portee
FR2820495A1 (fr) 2001-02-02 2002-08-09 Anthena Soc Projectile pour munitions a portee reduite
FR2882429B1 (fr) 2005-02-21 2007-03-30 Giat Ind Sa Ceinture d'etancheite pour projectile d'artillerie

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996992A (en) * 1944-09-26 1961-08-22 Charles L Critchfield Projectile
NL183186B (nl) * 1952-12-19 Chinoin Gyogyszer Es Vegyeszet Werkwijze voor de bereiding van aminozuur-derivaten en van farmaceutische voortbrengsels die ze bevatten, alsmede aldus verkregen farmaceutische voorwerpen.
DE1083708B (de) * 1958-11-05 1960-06-15 Ludwig Bucklisch Geschoss mit Fuehrungsring
US3834314A (en) * 1972-12-29 1974-09-10 Aai Corp Puller sabot ammunition with slip seal
DE2551389A1 (de) * 1975-11-15 1977-05-26 Rheinmetall Gmbh Fluegelstabilisiertes geschoss
US4242961A (en) * 1978-10-23 1981-01-06 Martin Marietta Corporation Chevron grooved decoupling obturator
DE3510913A1 (de) * 1985-03-26 1986-10-09 Diehl GmbH & Co, 8500 Nürnberg Projektil

Also Published As

Publication number Publication date
FR2606869A1 (fr) 1988-05-20
ATE54365T1 (de) 1990-07-15
EP0268535A1 (de) 1988-05-25
FR2606869B1 (fr) 1990-10-05
ES2016379B3 (es) 1990-11-01
DE3763578D1 (de) 1990-08-09

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