EP0584456B1 - Douille pour charge propulsive et son procédé de fabrication - Google Patents

Douille pour charge propulsive et son procédé de fabrication Download PDF

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Publication number
EP0584456B1
EP0584456B1 EP93107450A EP93107450A EP0584456B1 EP 0584456 B1 EP0584456 B1 EP 0584456B1 EP 93107450 A EP93107450 A EP 93107450A EP 93107450 A EP93107450 A EP 93107450A EP 0584456 B1 EP0584456 B1 EP 0584456B1
Authority
EP
European Patent Office
Prior art keywords
case
propellant charge
wall thickness
sleeve
shoulder
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
EP93107450A
Other languages
German (de)
English (en)
Other versions
EP0584456A1 (fr
Inventor
René Peters
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.)
Eurometaal NV
Original Assignee
NWM de Kruithoorn BV
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 NWM de Kruithoorn BV filed Critical NWM de Kruithoorn BV
Publication of EP0584456A1 publication Critical patent/EP0584456A1/fr
Application granted granted Critical
Publication of EP0584456B1 publication Critical patent/EP0584456B1/fr
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
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/26—Cartridge cases
    • F42B5/28—Cartridge cases of metal, i.e. the cartridge-case tube is of metal

Definitions

  • the invention relates to a propellant charge case according to the preamble of claim 1 and a method for its production according to the preamble of claim 2.
  • Propellant charge sleeves made of both steel and aluminum are known, the latter serving to save weight.
  • the wall thickness of propellant charge cases made of steel is also kept as low as possible, in particular for ammunition which is to be carried in the air.
  • a manufacturing method is known from US Pat. No. 3,058,195 which, however, serves the purpose of producing a projectile tip with a subsequent cylindrical bullet casing jacket of the same diameter.
  • a stamp enlarged in diameter over a single paragraph creates a stop through the paragraph, which is decisive for the ogive formation of the projectile tip and the compression process required for this. Due to the non-generic process steps and direction, this manufacturing process cannot be a model for the manufacturing process according to the invention.
  • the object of the invention is to provide a propellant charge case according to the preamble of claim 1, with the locking clamps and malfunctions in the unloading movement of the weapon in a caliber range between min. 25mm to 35mm or above can be avoided.
  • the wall thickness of the shoulder cone compared to that of the sleeve body is reduced at least in the area adjacent to the shoulder cone in the tenths of a millimeter range, which is produced when the sleeve body is pulled by using a stamp having a bead in the area of the later shoulder cone, surprisingly the mentioned malfunctions no longer occur observed.
  • the functional soothes that occurred can be attributed to the fact that the propellant charge sleeve expands not only radially but also axially in the cargo space due to the gas pressure when the shot is fired, with the axial widening of the axial locking movement of approx. 0.15 mm and thereby - if only slightly - is plastically deformed, which prevents complete springback.
  • the proposed tapering of the shoulder cone forming the transition region of the propellant charge sleeve could cause sufficient elastic resilience of the propellant charge sleeve when the shot is fired, so that the breech executes its axial resilience can and a jamming is reduced to a minimum by the friction generated between the closure and the sleeve base during the closure opening movement, so that the closure can be opened easily.
  • the one-piece propellant charge sleeve made of steel comprises a cylindrical sleeve body 1, which has a sleeve base 2 at one end and a sleeve neck 3 with a reduced diameter compared to the sleeve body 1 at the other end, the sleeve neck 3 via a shoulder cone 4 with the sleeve body 1 is connected.
  • the sleeve base 2 has a central opening 5 for receiving an igniter and a circumferential recess 6.
  • the sleeve body 1 is provided with a circumferential bead 7 at a certain distance from the shoulder cone 4.
  • the wall thickness of the sleeve body 1 decreases continuously from, for example, 1.4 mm to 0.9 mm from the area of the sleeve base 2 to the shoulder cone 4.
  • Such propellant charge cases are used, for example, for calibres from 25 mm to 35 mm or above.
  • the area of the shoulder cone 4 is preferably in the tenth of a millimeter range in its wall thickness d compared to the wall thickness d 'of the adjacent area of the sleeve body 1, which amounts to 0.9 mm, for example, by 0.05 mm to 0.4 mm, in particular 0.01 to 0 , 2 mm, which gives this area greater elasticity.
  • This shoulder cone 4 with reduced wall thickness is produced in that when a corresponding already sleeve-shaped fitting 8 is pulled, a punch 9 with a bead 10 which projects radially by a distance d '' from the outside diameter of the punch 9 and a length corresponding to that for the training of the later shoulder cone 4 has the required length is used, that in the area of the later shoulder cone 4 has a corresponding tenth of a millimeter Tapered wall thickness is generated so that when the shoulder cone 4 is subsequently shaped, it has a constant wall thickness, which is reduced compared to the sleeve body 1, despite the upsetting that occurs.
  • the propellant charge sleeve can be manufactured from a cylindrical blank which can first be shaped in a sleeve-like manner by upsetting processes and then by drawing processes.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Forging (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Claims (2)

  1. Douille pour charge propulsive en acier, comportant un corps de douille (1) cylindrique, présentant, à une extrémité, un fond de douille (2) et, à l'autre extrémité, un col de douille (3), le col de douille (3) étant relié au corps de douille (1), par l'intermédiaire d'un cône à épaulement (4) ayant une épaisseur de paroi sensiblement constante, caractérisée en ce que
    - la douille pour charge propulsive à un calibre de 25 mm à 35 mm ou plus;
    - l'épaisseur de paroi du corps de douille (1) va en diminuant de façon continue, de la zone du fond de douille (2) jusqu'au cône à épaulement (4);
    - l'épaisseur de paroi (d) constante du cône à épaulement (4) est inférieure, de 0,05 mm à 0,4 mm, à l'épaisseur de paroi (d') de la zone voisine du corps de douille (1).
  2. Procédé de fabrication d'une douille pour charge propulsive en acier selon la revendication 1, à partir d'une ébauche, de préférence cylindrique, par étirage d'un corps de douille cylindrique avec un fond de douille lui étant relié, façonnage du fond de douille et insertion de la zone de cône à épaulement et de la zone de col, caractérisé en ce que, lors de l'étirage du corps de douille, par utilisation d'un poinçon présentant un bourrelet, il est produit, dans la zone devenant ultérieurement le cône à épaulement, un effilement continu de l'épaisseur de paroi, se situant dans la plage allant de 0,05 mm à 0,4 mm, par rapport à l'épaisseur de paroi (d') de la zone voisine du corps de douille.
EP93107450A 1992-08-26 1993-05-07 Douille pour charge propulsive et son procédé de fabrication Expired - Lifetime EP0584456B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4228302A DE4228302A1 (de) 1992-08-26 1992-08-26 Treibladungshülse und Verfahren zu ihrer Herstellung
DE4228302 1992-08-26

Publications (2)

Publication Number Publication Date
EP0584456A1 EP0584456A1 (fr) 1994-03-02
EP0584456B1 true EP0584456B1 (fr) 1996-03-06

Family

ID=6466432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107450A Expired - Lifetime EP0584456B1 (fr) 1992-08-26 1993-05-07 Douille pour charge propulsive et son procédé de fabrication

Country Status (5)

Country Link
US (1) US5419258A (fr)
EP (1) EP0584456B1 (fr)
DE (2) DE4228302A1 (fr)
ES (1) ES2085675T3 (fr)
GR (1) GR3019292T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8291806B2 (en) * 2010-12-27 2012-10-23 Paul J Rael Helical ammunition magazine
US10866073B2 (en) * 2016-08-23 2020-12-15 Albert Gaide Method for producing multi-component cases

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2736085A (en) * 1956-02-28 Method of grain flow control
FR764951A (fr) * 1933-09-21 1934-05-31 Rheinische Metallw & Maschf Douille de cartouche
GB574877A (en) * 1942-11-17 1946-01-24 William Henry Raven Improvements in or relating to the manufacture of cartridge cases
US2402068A (en) * 1944-01-14 1946-06-11 Remington Arms Co Inc Ammunition
US2915424A (en) * 1952-11-05 1959-12-01 Lyon George Albert Method of making cartridge cases and like articles
US3058195A (en) * 1958-11-17 1962-10-16 Svenska Metallverken Ab Method for the manufacture from sheet metal of hollow objects having a wall thickness in the closed end exceeding the wall thickness of the starting material
BE744449A (fr) * 1970-01-15 1970-06-15 Harvey Aluminum Inc Douille de cartouche en aluminium
US3797396A (en) * 1972-03-15 1974-03-19 Us Army Reinforced lightweight cartridge
US4418607A (en) * 1977-04-21 1983-12-06 Hughes Helicopters, Inc. Single barrel externally powdered gun
DE3365245D1 (en) * 1982-06-08 1986-09-18 Oerlikon Buehrle Ag Cartridge case

Also Published As

Publication number Publication date
EP0584456A1 (fr) 1994-03-02
DE59301778D1 (de) 1996-04-11
US5419258A (en) 1995-05-30
GR3019292T3 (en) 1996-06-30
DE4228302A1 (de) 1994-03-03
ES2085675T3 (es) 1996-06-01

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