WO2004085953A1 - Munition pour arme portative 5,56 mm - Google Patents

Munition pour arme portative 5,56 mm Download PDF

Info

Publication number
WO2004085953A1
WO2004085953A1 PCT/GB2004/001108 GB2004001108W WO2004085953A1 WO 2004085953 A1 WO2004085953 A1 WO 2004085953A1 GB 2004001108 W GB2004001108 W GB 2004001108W WO 2004085953 A1 WO2004085953 A1 WO 2004085953A1
Authority
WO
WIPO (PCT)
Prior art keywords
projectile
diameter
main body
combination
grooves
Prior art date
Application number
PCT/GB2004/001108
Other languages
English (en)
Inventor
Derek Booth
Original Assignee
Bae Systems Plc
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 Bae Systems Plc filed Critical Bae Systems Plc
Priority to US10/492,985 priority Critical patent/US20050000385A1/en
Priority to EP04720915A priority patent/EP1606574B1/fr
Priority to JP2006500258A priority patent/JP4249219B2/ja
Priority to DE602004011031T priority patent/DE602004011031T2/de
Publication of WO2004085953A1 publication Critical patent/WO2004085953A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
    • F42B12/76—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the casing
    • F42B12/78—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the casing of jackets for smallarm bullets ; Jacketed bullets or projectiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
    • F42B12/74—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the core or solid body

Definitions

  • This invention relates to ammunition for use in a weapon having a rifled barrel, and especially to an improved form of projectile for small arms ammunition.
  • a projectile When a projectile is fired from a rifled barrel, the projectile must deform as it travels along the barrel so that material forming part of the projectile is forced into the spaces between the lands forming the rifling. This process is called engraving, and causes a spin to be imparted to the projectile by virtue of the longitudinal twist of the rifling.
  • the deformation of the projectile, its travel along the barrel effectively as a force fit to the rifling, the high linear acceleration imparted by the gun propellant on firing, and the consequent high rate of angular acceleration and associated force acting between rifling and projectile all contribute to substantial wear on the barrel. If this wear rate can be reduced, substantial benefits follow, including increased barrel life, higher muzzle velocity and hence increased accuracy and lethality.
  • a 7.62mm bullet formed from a steel alloy, having a forward body portion whose diameter corresponds to that of the rifling lands of an associated gun, and a rearward body portion having a greater diameter, and provided with annular grooves.
  • the body is provided with a coating which can be of copper.
  • the copper coating acts as a lubricant, and is less thick than the depth of the rifling.
  • the rifling therefore cuts through the copper coating so that the steel body of the bullet is engraved by the rifling.
  • the steel of the body must be soft, so as to permit this engraving to occur without undue barrel wear.
  • the maximum value for the hardness of the steel body mentioned in the disclosure is 210 Brinell, which equates to a Vickers Hardness of 213, i.e. very much less than the desirable minimum value of 550 Vickers Hardness.
  • the bullet disclosed in US Patent No 5686693 will lack the desirable target penetration capability.
  • the projectile will also have an ogival nose portion of the body forward of said forward body portion, although other forms are possible.
  • the main body of the projectile should normally have a diameter which is not greater than that defined by the roots of the grooves of the rifling.
  • the knurl lines or splines are designed to deform into the groove air gaps corresponding to said splines or knurl lines, and thus engaging with the lands, inducing spin in the projectile due to the twist of the rifling.
  • This deformation gives the body an interference fit with the rifling so as also to provide effective obturation by restricting or preventing the escape of propellant gases past the projectile via the rifling grooves.
  • the length and precise diameter of the body should be designed with these factors in mind.
  • the depth of said grooves of knurl lines should preferably be between about 1% and 10% of the nominal diameter of the projectile, and an optimum design may be between 2% and 6%.
  • the material selected for the projectile body will depend partly upon the function which the projectile is to perform, but in the case of High Performance Ammunition should not usually be below a Vickers Hardness of 550 HV.
  • steel is a suitable material, as it is inexpensive and can be readily formed into the desired shape, eg. by a cold-forming process.
  • Tungsten is another possible material because hardness is an important characteristic for target defeat, as are alloys of tungsten, and tungsten carbide.
  • the invention is particularly but not exclusively applicable to small arms weapons systems, having a nominal calibre of 20mm or less, especially 9mm or less.
  • Figure 1 shows a diagrammatic representation of a round of small arms ammunition incorporating grooves of knurl lines projectile for use in combination with a gun having a rifled barrel, in accordance with the invention
  • Figures 2A and 2B each shows a cross sectional elevation A-A through the projectile shown in Figure 1 , additionally depicting the envelope of said projectile.
  • a small arms ammunition projectile 1 comprising a main body portion 2, a tip portion 3 and along the main body a plurality of grooves or knurl lines 4 producing corresponding splines 5 and air gaps 6.
  • the projectile body is of elongate form and is cold formed from steel having a Vickers Hardness of at least 550. It can subsequently be given a heat treatment to provide the desired hardness or other physical properties.
  • the projectile comprises a body 2 of substantially cylindrical form.
  • the projectile Because of the substantial hardness of the projectile body material, the projectile is highly effective at penetration of targets such as titanium/kevlar body armour. Moreover, the hardness also serves to minimise ablation of the projectile tip profile, thus further contributing to its effectiveness in target penetration.
  • FIGs 2A and 2B show representative cross sections A-A on Figure 1.
  • the detail of the knurl lines 9 and associated 'groove' air gaps 6 of the projectile body core 7 is shown when the projectile body core 7 is located within surrounding jacket material 11.
  • the splines 5 and associated 'groove' air gaps 8 of the projectile body core 7 is shown when the projectile body core 7 is located within surrounding jacket material 11.
  • the jacket material 11 deforms into the corresponding groove air gaps 6, 8 corresponding to the splines 5 or knurl lines 9.
  • the internal diameter 10 of the jacket material 11 should preferably be substantially equal to or less than the diameter of any rifling grooves (not shown).
  • the presence of the grooves 6, 8 facilitates the necessary deformation of the jacket material 11, thus enabling the rifle engraving to take place with a substantially reduced axial force.
  • the fact that the jacket material 11 can deform into the grooves 6, 8 contributes considerably to a dramatic reduction in the axial force required for engraving to occur.
  • the projectile which forms part of the combination of gun and ammunition tile according to the invention is also considerably less expensive to manufacture than a corresponding conventional projectile in, for example, a gilding metal jacket.
  • the optimum design parameters for the projectile according to the invention can be determined by those skilled in the art, based on the teaching contained herein.
  • the invention is particularly but not exclusively applicable to small arms ammunition.
  • the invention has been successfully applied to 5.56mm gun and ammunition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Ladders (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Powder Metallurgy (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Fishing Rods (AREA)
  • Telescopes (AREA)

Abstract

L'invention concerne une cartouche prévue pour être tirée d'une arme présentant un canon rayé, en particulier une arme portative. Cette cartouche comprend un noyau de corps (7) présentant une pluralité de lignes de moletage (9) et des rainures associées (6), formés sur une partie du noyau de corps (7). La matière de chemise (11) est appliquée sur le noyau de corps (7), de sorte que le diamètre intérieur (10) de la matière de chemise (11) entre en contact avec les lignes de moletage (9). Lors du tir de la cartouche, la matière de chemise (11) se déforme dans les rainures (6) formées entre les lignes de moletage (9), de façon à permettre la gravure du canon avec une force axiale sensiblement réduite.
PCT/GB2004/001108 2003-03-27 2004-03-16 Munition pour arme portative 5,56 mm WO2004085953A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US10/492,985 US20050000385A1 (en) 2003-03-27 2004-03-16 5.56 Small arms ammunition
EP04720915A EP1606574B1 (fr) 2003-03-27 2004-03-16 Munition pour arme portative 5,56 mm
JP2006500258A JP4249219B2 (ja) 2003-03-27 2004-03-16 ５．５６ｍｍ小火器用弾薬
DE602004011031T DE602004011031T2 (de) 2003-03-27 2004-03-16 5,56-mm-handfeuerwaffenmunition

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0307274.1 2003-03-27
GBGB0307274.1A GB0307274D0 (en) 2003-03-27 2003-03-27 5.56 small arms ammunition

Publications (1)

Publication Number Publication Date
WO2004085953A1 true WO2004085953A1 (fr) 2004-10-07

Family

ID=29286765

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/001108 WO2004085953A1 (fr) 2003-03-27 2004-03-16 Munition pour arme portative 5,56 mm

Country Status (8)

Country Link
US (1) US20050000385A1 (fr)
EP (1) EP1606574B1 (fr)
JP (1) JP4249219B2 (fr)
AT (1) ATE382843T1 (fr)
DE (1) DE602004011031T2 (fr)
ES (1) ES2295839T3 (fr)
GB (1) GB0307274D0 (fr)
WO (1) WO2004085953A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3325913A4 (fr) * 2015-07-23 2019-02-27 Vista Outdoor Operations LLC Cartouche à pénétration améliorée et balle à expansion
US10551154B2 (en) 2017-01-20 2020-02-04 Vista Outdoor Operations Llc Rifle cartridge with improved bullet upset and separation
US20220290957A1 (en) * 2019-08-05 2022-09-15 Ruag Ammotec Ag Bullet, method of manufacturing a bullet, punch for manufacturing a bullet, and method of rotationally securing a bullet core with respect to a bullet jacket of a bullet
US11808551B2 (en) 2015-07-23 2023-11-07 Federal Cartridge Company Cartridge with improved penetration and expansion bullet

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050183617A1 (en) * 2004-02-23 2005-08-25 Macdougall John Jacketed ammunition
JP5244010B2 (ja) * 2009-03-30 2013-07-24 旭精機工業株式会社 小火器用弾丸
ITMI20110506A1 (it) * 2011-03-29 2012-09-30 Fiocchi Munizioni Spa Pallottola per arma da fuoco, e relativa arma
US8857343B2 (en) * 2012-05-29 2014-10-14 Liberty Ammunition, Llc High volume multiple component projectile assembly
US9581402B2 (en) * 2014-06-04 2017-02-28 The United States Of America As Represented By The Secretary Of The Army Projectile for use with a tapered bore gun
US11333472B1 (en) * 2018-07-16 2022-05-17 Vista Outdoor Operations Llc Reduced stiffness barrel fired projectile
WO2020124708A1 (fr) * 2018-12-19 2020-06-25 南京工业大学 Balle ayant un effet de coefficient de poisson négatif et son procédé de conception
DE102022121811A1 (de) 2022-08-29 2024-02-29 Rws Gmbh Geschoss mit reduzierter Laufbelastung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE309293C (fr) *
GB697172A (en) * 1950-06-17 1953-09-16 Birmingham Small Arms Co Ltd Improvements in or relating to armour-piercing cores for projectiles
FR2511497A1 (fr) * 1978-09-08 1983-02-18 Diehl Gmbh & Co Projectile a corps tubulaire
FR2540239A1 (fr) * 1983-02-02 1984-08-03 Antoine Robert Projectile a noyau et revetement ductile et cartouche comprenant un tel projectile
US5686693A (en) 1992-06-25 1997-11-11 Jakobsson; Bo Soft steel projectile

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349711A (en) * 1964-12-07 1967-10-31 Remington Arms Co Inc Process of forming jacketed projectiles
BR8406941A (pt) * 1983-06-22 1985-06-04 Branscomb Corp Nv Peca de municao
DE59801093D1 (de) * 1997-08-26 2001-08-30 Ruag Munition Thun Mantelgeschoss mit hartkern
US6305293B1 (en) * 1998-04-14 2001-10-23 Laser Ii, Llc Multiple-component projectile with non-discarding sabot sleeve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE309293C (fr) *
GB697172A (en) * 1950-06-17 1953-09-16 Birmingham Small Arms Co Ltd Improvements in or relating to armour-piercing cores for projectiles
FR2511497A1 (fr) * 1978-09-08 1983-02-18 Diehl Gmbh & Co Projectile a corps tubulaire
FR2540239A1 (fr) * 1983-02-02 1984-08-03 Antoine Robert Projectile a noyau et revetement ductile et cartouche comprenant un tel projectile
US5686693A (en) 1992-06-25 1997-11-11 Jakobsson; Bo Soft steel projectile

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3325913A4 (fr) * 2015-07-23 2019-02-27 Vista Outdoor Operations LLC Cartouche à pénétration améliorée et balle à expansion
US10520288B2 (en) 2015-07-23 2019-12-31 Vista Outdoor Operations Llc Cartridge with improved penetration and expansion bullet
US10928170B2 (en) 2015-07-23 2021-02-23 Vista Outdoor Operations Llc Cartridge with improved penetration and expansion bullet
US11346641B2 (en) 2015-07-23 2022-05-31 Vista Outdoor Operations Llc Cartridge with improved penetration and expansion bullet
US11808551B2 (en) 2015-07-23 2023-11-07 Federal Cartridge Company Cartridge with improved penetration and expansion bullet
US10551154B2 (en) 2017-01-20 2020-02-04 Vista Outdoor Operations Llc Rifle cartridge with improved bullet upset and separation
US11280595B2 (en) 2017-01-20 2022-03-22 Vista Outdoor Operations Llc Rifle cartridge with improved bullet upset and separation
US20220290957A1 (en) * 2019-08-05 2022-09-15 Ruag Ammotec Ag Bullet, method of manufacturing a bullet, punch for manufacturing a bullet, and method of rotationally securing a bullet core with respect to a bullet jacket of a bullet
US11906275B2 (en) * 2019-08-05 2024-02-20 Ruag Ammotec Ag Bullet, method of manufacturing a bullet, punch for manufacturing a bullet, and method of rotationally securing a bullet core with respect to a bullet jacket of a bullet

Also Published As

Publication number Publication date
JP2006515056A (ja) 2006-05-18
DE602004011031T2 (de) 2009-01-02
EP1606574A1 (fr) 2005-12-21
US20050000385A1 (en) 2005-01-06
GB0307274D0 (en) 2003-10-29
ES2295839T3 (es) 2008-04-16
JP4249219B2 (ja) 2009-04-02
ATE382843T1 (de) 2008-01-15
EP1606574B1 (fr) 2008-01-02
DE602004011031D1 (de) 2008-02-14

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