EP1240475B1 - Corps d'obus, et procede de realisation de moyens de guidage faisant saillie radialement - Google Patents

Corps d'obus, et procede de realisation de moyens de guidage faisant saillie radialement Download PDF

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Publication number
EP1240475B1
EP1240475B1 EP00982808A EP00982808A EP1240475B1 EP 1240475 B1 EP1240475 B1 EP 1240475B1 EP 00982808 A EP00982808 A EP 00982808A EP 00982808 A EP00982808 A EP 00982808A EP 1240475 B1 EP1240475 B1 EP 1240475B1
Authority
EP
European Patent Office
Prior art keywords
projectile
base body
guide means
welding
driving means
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
EP00982808A
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German (de)
English (en)
Other versions
EP1240475A1 (fr
Inventor
Kurt Steinhoff
Matthias Schupfer
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.)
RUAG Components AG
Original Assignee
RUAG Components AG
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 RUAG Components AG filed Critical RUAG Components AG
Priority to EP00982808A priority Critical patent/EP1240475B1/fr
Publication of EP1240475A1 publication Critical patent/EP1240475A1/fr
Application granted granted Critical
Publication of EP1240475B1 publication Critical patent/EP1240475B1/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
    • 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 invention relates to a method for producing a Projectile with guide means according to the preamble of the claim 1.
  • Known projectiles usually point to the outer surface of the Projectile body fastened copper guide means on; they are designed in the form of annular elevations.
  • the guide means acts as a seal against those acting on the rear side of the floor are called powder gases and as a friction-reducing intermediate layer between projectile body and gun barrel.
  • a sub-caliber balancing bullet (EP - A2-0392) with a droppable sabot.
  • a steel shell applied, which provided with a thread after reworking segmented sabot carries.
  • guide belts are placed on preheated, rotating ammunition bodies by previously known Metal spraying process in a protective gas atmosphere generated.
  • the application materials are molybdenum, nickel aluminide or cerments based on aluminum-nickel oxide and called CuZn 85/15.
  • There is also internal cooling of the ammunition body is provided during the injection process. This procedure is only lower for guide bands Suitable thickness; the effort for those who are in the trains of Having to intervene in the gun barrel is not economical justifiable.
  • the entire welding arrangement is relatively complex and requires the monitoring of a total of four material feeds, in addition, the process is on a shift of a few Millimeters (0.125 inch).
  • the invention is therefore based on US Pat. No. 2,813,190 underlying the problem of being economically a floor fabricate and design it to withstand the high launch loads modern guns withstand and at the same time an entry of copper into the gun barrel and its surroundings largely avoided. It should therefore be a procedure for the production of radially protruding guide means be trained that this for mass production is suitable and that optimal adhesion to the projectile body results. Extremely high temperature and Gas pressure loads on the guide means occur can without this failure.
  • the subject of the invention is intended in particular for thin-walled, Projectiles containing payloads, so-called “carrier projectiles” are suitable.
  • the layer thickness of the guide means should be adapted to the purpose of the projectile, be freely definable
  • the copper content can be at least in the area touching the gun barrel when fired reduce the projectile body almost arbitrarily. Thereby can detach the copper from the guide means can be reliably prevented.
  • the floor according to the invention thereby largely prevents it from being fired an entry of copper into the gun barrel and its surroundings.
  • Soiling and / or a reduction in wear resistance the inner surface of the gun barrel by reducing its strength and embrittlement, due to metallurgical interactions between the materials can thus be reliably avoided.
  • the guide means can be according to another advantageous one Further development of the invention is particularly inexpensive finished.
  • the projectile body has one in the area of the guide means particularly high stability when the material of the base body is a tempering steel or a maraging steel.
  • the nickel-containing layer could, for example, on be applied to a guide tape.
  • the leader band could then like that of the known floor with be connected to the projectile body. To reduce the It bears the manufacturing costs of the projectile according to the invention however, when the guide means are directly on the projectile body are arranged.
  • the guide means is a special one have high resistance if they contain nickel of over 90%.
  • the Guide means made of high-purity nickel with over 99% nickel.
  • Commercially available nickel 200 has proven itself also called “commercially pure nickel” with 99.5Ni-0.08C (American Society for Metals; UNS number N02200)
  • This design allows a copper portion of the radial outer area of the guide means to an intended, Limit tolerable measure or completely prevent it. Because the radially outer area of the guide means touching the gun barrel when fired can result in a transmission of copper from the guide means to the gun barrel can be reliably prevented, even if the projectile body Contains copper.
  • the guide means can be applied using the Procedure, despite the small effort, large dimensions (Caliber).
  • Adverse changes in the metallic structure or too Cracks and micro voids in the connection of the nickel containing Layer with the usually made of a steel alloy manufactured basic body can be according to a other advantageous development of the invention largely avoided if the base body after the build-up welding process at 815 ° C for one hour to three hours exposed to an inert gas atmosphere for a long time.
  • the base body After the build-up welding process at 815 ° C for one hour to three hours exposed to an inert gas atmosphere for a long time.
  • the structure of the The material of the base body can be homogenized at the same time.
  • the guiding means can be sheared off during firing avoiding the bullet reliably.
  • Argon is particularly suitable as the protective gas.
  • Foreseen tolerances of the guide means can be according to a further advantageous development simple comply if the layer containing nickel after Deposition welding to the intended dimensions is processed. This machining can, for example done in the turning process.
  • FIG. 1a and 1b represent partial areas of a floor 1, with FIG. 1a showing a first partial area a guide means 2 in its design before the launch in direction A from a gun barrel, not shown with a spiral-shaped inner contour.
  • the guide means 2 consists of high-purity nickel and is in a circumferential groove in the projectile body 5 made of tempered steel 42CrMo4 anchored and shoulders 3.
  • the front part of floor 1 is notoriously known Designed wise; the firing direction is here with one Arrow characterized and labeled with A.
  • the base body 5 can also be used with the projectile body 1 connected steel ring to be made.
  • Figures 2 and 3 illustrate two process steps in the production of the guide means 2.
  • the Base body 5 made of 42CrMo4 alloy steel tube or Maraging steel made. This base body 5 has, as in Figure 2 shown, a smooth outer surface and bevels formed by chamfers to its groove 7.
  • the base body 5 For removing welding stresses, cracks and micro voids the base body 5 after the generation of the circumferential welding layer 6 fed to a heat treatment.
  • the base body 5 is also Layer 6 first at 815 ° C in an argon atmosphere warmed and this temperature between one hour and three Held for hours. After a slow cooling to room temperature and then reheating the Base body 5 heated to 480 ° C and this temperature between held for another three to six hours. After a layer 6 has the last cooling to room temperature and the base body 5 has a homogeneous structure.
  • the processing of the welding layer 6 takes place in a notorious manner known manner by machining on the given over-caliber measure.
  • Base ring made of maragin steel, caliber 150 mm (Diameter); Length 120 mm; Width of the guide means 52 mm.
  • Cooling water with an inlet pressure of 2 bar via a Dorn directed the beam during the deposition welding is for the ring and grooved for the Throttling the flow.
  • the measured water flow was about 5 l / s.
  • Base floor made of maragin steel (closed on one side) 150 mm caliber; Length 700 mm; Width of Guide means 52 mm.
  • Cooling water with an inlet pressure of 2 bar via a Flange initiated with O-ring seal (upper hole) and derived (lower hole); during build-up welding there is a turbulent flow in the base body.
  • the measured water flow was also approximately 5 l / s.
  • the welding parameters can also be adapted to the technical requirements of the machine or
  • the cooling medium water can be caused by other flowable substances be replaced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arc Welding In General (AREA)
  • Microwave Tubes (AREA)

Abstract

Selon l'invention, des moyens de guidage (2), constitués d'un nickel le plus pur possible, sont disposés par liaison de matière sur la surface enveloppe d'un obus. On évite ainsi la pénétration de cuivre dans un tube d'arme destiné au tir de l'obus, ce qui a pour résultat d'augmenter la durée de vie dudit tube. La réalisation des moyens de guidage (2) se fait, de préférence, par rechargement ou par soudure dans une atmosphère de protection. On obtient ainsi une fixation fiable des éléments de guidage (2-4) ancrés directement dans un corps d'obus (1) dont la paroi peut être mince, et ces éléments de guidage peuvent subir des sollicitations au tir très élevées.

Claims (4)

  1. Procédé de réalisation d'un obus avec des moyens de guidage disposés directement sur son corps d'obus, faisant saillie radialement d'un corps de base, pour le guidage du corps d'obus dans un canon, par une application au moins monocouche d'une couche sur un corps de base en rotation au moyen d'un procédé de soudage à l'arc sous atmosphère de gaz protecteur, l'électrode de fil d'apport étant déviée périodiquement et uniformément à partir d'une position centrale dans la direction longitudinale, essentiellement dans la direction de l'axe longitudinal du corps de base, et l'intérieur du corps de base étant alimenté pendant l'opération de soudage par un liquide réfrigérant, caractérisé en ce que l'application est assurée par un fil d'apport d'une teneur en nickel d'au moins 90%, en ce que l'électrode de fil d'apport est déviée d'au moins la demi-largeur des moyens de guidage, et en ce que le corps de base, après le procédé de rechargement par soudure, est exposé pendant une à trois heures à une atmosphère de gaz protecteur à une température de 800°C à 850°C, de préférence de 815°C.
  2. Procédé suivant la revendication 1, caractérisé en ce que l'application de la couche renfermant du nickel est réalisée en deux couches.
  3. Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que la vitesse d'avance absolue du fil d'apport est réglée dans une plage de 0,03 m/s à 0,1 m/s.
  4. Procédé suivant la revendication 1, caractérisé en ce que le corps de base est exposé pendant trois à six heures à une atmosphère de gaz protecteur de 480°C.
EP00982808A 1999-12-20 2000-12-20 Corps d'obus, et procede de realisation de moyens de guidage faisant saillie radialement Expired - Lifetime EP1240475B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00982808A EP1240475B1 (fr) 1999-12-20 2000-12-20 Corps d'obus, et procede de realisation de moyens de guidage faisant saillie radialement

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP99811175A EP1111327A1 (fr) 1999-12-20 1999-12-20 Projectile et procédé pour la production de moyens de guidage dépassant radialement du projectile
EP99811175 1999-12-20
PCT/CH2000/000676 WO2001046641A1 (fr) 1999-12-20 2000-12-20 Corps d'obus, et procede de realisation de moyens de guidage faisant saillie radialement
EP00982808A EP1240475B1 (fr) 1999-12-20 2000-12-20 Corps d'obus, et procede de realisation de moyens de guidage faisant saillie radialement

Publications (2)

Publication Number Publication Date
EP1240475A1 EP1240475A1 (fr) 2002-09-18
EP1240475B1 true EP1240475B1 (fr) 2004-03-03

Family

ID=8243199

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99811175A Withdrawn EP1111327A1 (fr) 1999-12-20 1999-12-20 Projectile et procédé pour la production de moyens de guidage dépassant radialement du projectile
EP00982808A Expired - Lifetime EP1240475B1 (fr) 1999-12-20 2000-12-20 Corps d'obus, et procede de realisation de moyens de guidage faisant saillie radialement

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP99811175A Withdrawn EP1111327A1 (fr) 1999-12-20 1999-12-20 Projectile et procédé pour la production de moyens de guidage dépassant radialement du projectile

Country Status (6)

Country Link
EP (2) EP1111327A1 (fr)
AU (1) AU1979701A (fr)
DE (1) DE50005561D1 (fr)
ES (1) ES2215766T3 (fr)
NO (1) NO323281B1 (fr)
WO (1) WO2001046641A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE306406C (fr) *
FR5398E (fr) * 1904-04-20 1906-03-27 Krupp Ag Projectile en acier avec évidement rempli d'un métal à poids spécifique élevé
US2353693A (en) * 1942-09-28 1944-07-18 Joseph H Church Rotating band
US2813190A (en) * 1954-11-01 1957-11-12 Air Reduction Multiple arc welding
US3888295A (en) * 1973-10-29 1975-06-10 David E Schillinger Method of bonding an annular band of material to an object
DE3539310A1 (de) * 1985-11-06 1987-05-07 Rheinmetall Gmbh Verfahren zum aufbringen eines metallischen fuehrungsbandes auf eine geschosshuelle insbesondere geringer wandstaerke sowie nach diesem verfahren hergestellte geschosshuelle
DE3911575A1 (de) * 1989-04-08 1990-10-11 Rheinmetall Gmbh Geschossanordnung

Also Published As

Publication number Publication date
NO323281B1 (no) 2007-02-26
AU1979701A (en) 2001-07-03
NO20022941D0 (no) 2002-06-19
EP1240475A1 (fr) 2002-09-18
NO20022941L (no) 2002-06-20
DE50005561D1 (de) 2004-04-08
WO2001046641A1 (fr) 2001-06-28
EP1111327A1 (fr) 2001-06-27
ES2215766T3 (es) 2004-10-16

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