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EP0355265B1 - Sabot pour obus à stabilisation par rotation - Google Patents

Sabot pour obus à stabilisation par rotation Download PDF

Info

Publication number
EP0355265B1
EP0355265B1 EP19890107600 EP89107600A EP0355265B1 EP 0355265 B1 EP0355265 B1 EP 0355265B1 EP 19890107600 EP19890107600 EP 19890107600 EP 89107600 A EP89107600 A EP 89107600A EP 0355265 B1 EP0355265 B1 EP 0355265B1
Authority
EP
European Patent Office
Prior art keywords
sabot
plastic material
fact
accordance
spin
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
EP19890107600
Other languages
German (de)
English (en)
Other versions
EP0355265A1 (fr
Inventor
Bernhard Bisping
Michael Vagedes
Sigfried Kessler
Ulrich Dr. Theis
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.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall GmbH
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 Rheinmetall GmbH filed Critical Rheinmetall GmbH
Publication of EP0355265A1 publication Critical patent/EP0355265A1/fr
Application granted granted Critical
Publication of EP0355265B1 publication Critical patent/EP0355265B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/064—Sabots enclosing the rear end of a kinetic energy projectile, i.e. having a closed disk shaped obturator base and petals extending forward from said base
    • 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
    • F42B14/068—Sabots characterised by the material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/902—High modulus filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer

Definitions

  • the invention relates to a sabot for a spin-stabilized sub-caliber projectile, which consists at least partially of molded polyamide-containing plastic material.
  • Such a sabot is known for example from EP-A 00 51 375 Figure 1 or EP-A 01 46 745 Figure 1 for spin-stabilized sub-caliber multi-purpose projectiles.
  • FAPDS projectiles F rangible rmour A P D iercing iscarding abot S
  • B. fighter planes, armored attack helicopters and fast moving light armored land targets are provided.
  • these bullets are fired from automatic machine guns, for example in caliber 20 to 35 mm with high cadence (approx. 400 to 800 rounds per minute).
  • Such sabot projectiles should have the lowest possible sabot weight (dead load component); the ammunition should be inexpensive and ensure a high target performance.
  • ammunition for automatic weapons is subject to a high feed load, since it is inserted into the weapon at high speed and braked suddenly in the cartridge chamber.
  • problems arise with the usual polyamide-containing plastic materials of the sabot cage in that they have a high water absorption and thus swell and have poor dimensional stability.
  • Such ammunition suffers an increase in diameter in the Caliber, so that it can only be loaded with a very high amount of force, possibly no longer loadable into the weapon and difficult to unload or no longer unloadable.
  • Guns are the direct result of the caliber expansion of the sabot hood.
  • Uneven detachment behavior of the sabot segments occurs more and more when the mechanical properties (e.g. the elasticity) change with the water absorption.
  • the water absorption makes the previously common plastic materials tougher and more unevenly elastic; the tearing process of the hood segments after leaving the pipe mouth then takes longer and becomes more uneven; Disturbances on the projectile body are larger and more frequent.
  • a sabot having the features specified in the characterizing part of claim 1.
  • a dead load reduction or weight saving of approximately 12 to 14% is achieved with the same hood volume in comparison with a conventional sabot cage hood.
  • the tensile strength of the hood material advantageously increases to approximately 120 to 130 N / mm2 and the elongation at break (elasticity) decreases to 3 to 5%, and the sabot according to the invention is characterized by a very high feed strength and after firing with improved detachment behavior of the individual sabot segments from the projectile body.
  • the tensile strength is almost twice as high as with previously known plastic hood materials. Due to the extremely low water absorption capacity, a very high dimensional accuracy of the sabot dimensions is achieved even at different temperatures and ambient humidity, such as B. Arctic climate or tropical climate. The water absorption capacity or fluctuations in the moisture content of the plastic material are also with z. B. short-term storage in water very low, since the willingness to absorb moisture depends on the actuation moisture, which is very low for the plastic material according to the invention with less than 0.8%.
  • the stress crack resistance of the sabot material is excellent even when exposed to chemicals.
  • the good resistance to chemicals and the low moisture absorption are good prerequisites for decontamination of ammunition that may be necessary.
  • the sabot material according to the invention is further characterized in that it has a high notched impact strength or impact strength even at low temperatures (approx. -40 ° C.).
  • a high abrasion resistance and a low coefficient of sliding friction of the sabot material when friction against steel are the factors that the wear and friction resistance in the weapon barrel are very low, whereby a long service life of the weapon and a higher initial speed of the ammunition is achieved.
  • Due to the carbon fiber portion according to the invention (reinforcing element in the plastic material) a higher stiffness of the material is achieved while lowering the specific weight and the associated weight saving.
  • the low water absorption capacity offers a high dimensional stability of the sabot, especially on the outside diameter (caliber) and in the thickness of the intended breaking points.
  • the coaxial centering of the projectile body in the sabot or the concentricity is improved, the unloadability and the flight behavior are also improved and a higher initial speed V o is achieved by reduced friction in the tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Reinforced Plastic Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (4)

1. Sabot pour obus sous-calibré, à stabilisation par rotation, composé au moins partiellement en matière synthétique moulée à teneur en polyamide, caractérisé en ce que la matière synthétique présente
- une proportion en fibres de carbone de 5 à 30%, de préférence d'à peu près 15%,
- un poids spécifique inférieur ou égal à 1,11g/cm³,
- une résistance à la traction supérieure à 120N/mm²,
- et une capacité d'absorption d'eau maximale intérieure ou égale à 0,8%, conférant des propriétés mécaniques extrêmement constantes et une stabilité dimensionnelle extrêmement élevée.
2. Sabot selon la revendication 1, caractérisé en ce que la matière synthétique présente en plus une proportion en fibres de verre de 3 à 10%, de préférence d'à peu près 6%.
3. Sabot selon la revendication 1, caractérisé en ce que la résilience est comprise entre 10 et 25kJ/m² à température ambiante et entre 6 et 10kJ/m² à -40°C.
4. Sabot selon la revendication 1, 2 ou 3, caractérisé en ce que la matière synthétique est moulée en une phase opératoire utilisant la technique connue de moulage par injection, dans un moule d'injection correspondant aux dimensions finales du sabot.
EP19890107600 1988-08-16 1989-04-27 Sabot pour obus à stabilisation par rotation Expired - Lifetime EP0355265B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3827739 1988-08-16
DE3827739A DE3827739A1 (de) 1988-08-16 1988-08-16 Treibkaefig fuer ein drallstabilisiertes geschoss

Publications (2)

Publication Number Publication Date
EP0355265A1 EP0355265A1 (fr) 1990-02-28
EP0355265B1 true EP0355265B1 (fr) 1992-05-06

Family

ID=6360932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890107600 Expired - Lifetime EP0355265B1 (fr) 1988-08-16 1989-04-27 Sabot pour obus à stabilisation par rotation

Country Status (3)

Country Link
US (1) US5063854A (fr)
EP (1) EP0355265B1 (fr)
DE (2) DE3827739A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7594472B1 (en) 1990-06-13 2009-09-29 Qinetiq Limited Sabot
DE4041716A1 (de) * 1990-12-24 1992-06-25 Rheinmetall Gmbh Treibkaefig und verfahren zur herstellung des treibkaefigs
DE69606950T2 (de) * 1995-06-07 2000-11-16 Raytheon Co., El Segundo Aerodynamisch stabilisiertes projektilsystem zur anwendung gegen unterwasserobjekte
US5789699A (en) * 1996-12-16 1998-08-04 Primex Technologies, Inc. Composite ply architecture for sabots
US6279214B1 (en) 1999-07-14 2001-08-28 Alliant Techsystems Inc. Moisture seal for composite sabot with depleted uranium penetrator
SE536320C2 (sv) * 2011-04-14 2013-08-20 Bae Systems Bofors Ab Kvarsittande slirande gördel för en projektil

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3318972A1 (de) * 1982-05-28 1983-12-01 Aktiebolaget Bofors, 69180 Bofors Treibelement fuer ein unterkalibriges geschoss

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL137889C (fr) * 1967-07-28
US3991682A (en) * 1975-09-26 1976-11-16 The United States Of America As Represented By The Secretary Of The Army Canister cartridge and projectile assembly with releasable nose
US4015527A (en) * 1976-03-10 1977-04-05 The United States Of America As Represented By The Secretary Of The Air Force Caseless ammunition round with spin stabilized metal flechette and disintegrating sabot
DE3104745A1 (de) * 1980-06-26 1984-04-19 Rheinmetall GmbH, 4000 Düsseldorf Geschoss
AU545632B2 (en) * 1980-11-05 1985-07-25 Pacific Technica Corp. Frangible projectile
IT1210890B (it) * 1982-05-26 1989-09-29 Ates Componenti Elettron Circuito multivibratore, integrabile monoliticamente, avente un'uscita posizionabile in uno stato preferenziale.
DE3332023A1 (de) * 1983-09-06 1985-03-21 Helmut Dipl.-Phys. 5529 Bauler Nußbaum Treibspiegel fuer unterkalibrige geschosse
EP0146745A1 (fr) * 1983-12-22 1985-07-03 Werkzeugmaschinenfabrik Oerlikon-Bührle AG Projectile stabilisé de calibre réduit à usage multiple
US4642271A (en) * 1985-02-11 1987-02-10 The United States Of America As Represented By The Secretary Of The Navy BN coating of ceramic fibers for ceramic fiber composites
US4868038A (en) * 1987-10-23 1989-09-19 The Dow Chemical Company Carbonaceous fiber reinforced composites
US4851280A (en) * 1988-04-01 1989-07-25 E. I. Du Pont De Nemours And Company Composite tooling for composites manufacture
US4958571A (en) * 1989-09-13 1990-09-25 The United States Of America As Represented By The Secretary Of The Army Continuous-fiber reinforcement sabot

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3318972A1 (de) * 1982-05-28 1983-12-01 Aktiebolaget Bofors, 69180 Bofors Treibelement fuer ein unterkalibriges geschoss

Also Published As

Publication number Publication date
US5063854A (en) 1991-11-12
DE58901323D1 (de) 1992-06-11
EP0355265A1 (fr) 1990-02-28
DE3827739A1 (de) 1990-02-22

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