EP0026511B1 - Method for manufacturing a composite barrel - Google Patents
Method for manufacturing a composite barrel Download PDFInfo
- Publication number
- EP0026511B1 EP0026511B1 EP80200826A EP80200826A EP0026511B1 EP 0026511 B1 EP0026511 B1 EP 0026511B1 EP 80200826 A EP80200826 A EP 80200826A EP 80200826 A EP80200826 A EP 80200826A EP 0026511 B1 EP0026511 B1 EP 0026511B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- barrel
- manufacturing
- des
- une
- layers
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000002131 composite material Substances 0.000 title claims description 4
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 239000012792 core layer Substances 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000003380 propellant Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000001141 propulsive effect Effects 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- VNTLIPZTSJSULJ-UHFFFAOYSA-N chromium molybdenum Chemical compound [Cr].[Mo] VNTLIPZTSJSULJ-UHFFFAOYSA-N 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229960001868 propulsives Drugs 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
- F41A21/02—Composite barrels, i.e. barrels having multiple layers, e.g. of different materials
-
- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/12847—Cr-base component
- Y10T428/12854—Next to Co-, Fe-, or Ni-base component
Definitions
- the present invention relates to a method of manufacturing a composite gun.
- the object of the invention is to provide a method of manufacturing such a gun, the latter consisting of three superimposed layers without solutions of continuity.
- a satisfactory method consists, in accordance with the invention, of threading three tubes, each intended to form one of the above-mentioned layers, and co-hammering them on the mandrel until all solution of continuity between said tubes disappears.
- a striped mandrel will be used for co-hammering, which makes it possible to obtain a striped blank and thereby reduces the manufacturing costs.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Forging (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
La présente invention concerne un procédé de fabrication d'un canon composite.The present invention relates to a method of manufacturing a composite gun.
Les armes automatiques sont des mécanismes dont les sous-ensembles et les pièces constitutives sont soumis à des contraintes de fonctionnement sévères. Il en est particulièrement ainsi des canons et tout spécialement des canons des armes utilisées à des cadences très élevées, tels que les canons des mitrailleuses. Dans ce cas, le métal du canon est sollicité mécaniquement alors qu'il est maintenu à une température relativement élevée et en tous cas supérieure à 500 °C. Cette élévation de la température est due à la combustion de la poudre propulsive et aux frottements. L'énergie disponible sert principalement à mouvoir le projectile, mais une fraction non négligeable de cette énergie est transformée en chaleur qui est dissipée vers l'extérieur au travers du métal du canon qui s'échauffe fortement. En fait, les contraintes peuvent être résumées de la façon suivante :
- l'érosion et la corrosion par les gaz de combustion de la poudre propulsive ;
- la fatigue thermique due aux sollicitations mécaniques répétées à température élevée ;
- la friction provoquée par le passage du projectile qui, partant d'une vitesse nulle, acquiert une vitesse de plusieurs centaines de m/sec. en une milliseconde ;
- une pression Interne de plusieurs milliers de bars qui induit dans le canon des tensions mécaniques Importantes mais de courte durée.
- erosion and corrosion by the combustion gases of the propellant powder;
- thermal fatigue due to repeated mechanical stresses at high temperature;
- the friction caused by the passage of the projectile which, starting from a zero speed, acquires a speed of several hundred m / sec. in a millisecond;
- an internal pressure of several thousand bars which induces significant but short-lived mechanical tensions in the barrel.
Ces phénomènes sont bien connus des spécialistes et ils ont tenté par divers moyens de trouver des solutions à ce problème complexe, car si les aciers alliés (matériaux généralement utilisés pour la confection des canons) permettent aux armes de fonctionner correctement à des cadences relativement faibles, ils n'autorisent pas l'application de cadences élevées pendant un laps de temps raisonnable. Il en découle que la vie d'un canon en acier utilisé à des cadences élevées est relativement brève. On peut donc dire qu'il existe un besoin réel de disposer d'un canon permettant le tir à cadences élevées avec une durée de vie acceptable dans ces conditions. Ce canon devrait en fait présenter les caractéristiques suivantes :
- une résistance mécanique élevée à température ambiante et à 900 °C ;
- une bonne résilience jusqu'à - 60 °C ;
- un coefficient de frottement faible vis-à-vis des matériaux utilisés comme enveloppe des projectiles même à des températures de l'ordre de 1000°C;
- une résistance appréciable à la corrosion par les gaz de combustion des poudres propulsives ;
- une faible susceptibilité à la fatigue thermique ;
- une conductivité thermique importante ;
- une bonne aptitude à la mise à forme à l'aide des équipements classiques permettant de réaliser sans difficultés majeures le rayage interne et l'usinage externe.
- high mechanical strength at room temperature and 900 ° C;
- good resilience down to - 60 ° C;
- a low coefficient of friction with respect to the materials used as the casing of the projectiles even at temperatures of the order of 1000 ° C;
- appreciable resistance to corrosion by the gases of propellant powders;
- low susceptibility to thermal fatigue;
- high thermal conductivity;
- good formability using conventional equipment allowing internal scratching and external machining to be carried out without major difficulties.
Le but de l'invention est de fournir un procédé de fabrication d'un tel canon, ce dernier étant constitué de trois couches superposées sans solutions de continuité.The object of the invention is to provide a method of manufacturing such a gun, the latter consisting of three superimposed layers without solutions of continuity.
Des matériaux convenant à la réalisation d'un tel canon sont par exemple :
- - pour la couche interne, le chrome, le tungstène, le niobium, le carbure de tungstène et similaires ou des alliages de ceux-ci ;
- - pour la couche médiane, des alliages à base de cobalt tels qu'utilisés entre autres dans la construction des turbo-réacteurs ;
- - pour la couche externe, des aciers alliés, par exemple au chrome-molybdène d'un usinage relativement aisé.
- - for the inner layer, chromium, tungsten, niobium, tungsten carbide and the like or alloys thereof;
- - for the middle layer, cobalt-based alloys as used inter alia in the construction of turbo-reactors;
- - For the outer layer, alloy steels, for example chromium-molybdenum of relatively easy machining.
L'absence de solutions de continuité est essentielle, sans quoi existeraient des points chauds conduisant à des destructions prématurées. Des essais ont démontré que la superposition de couches tubulaires par frettage ou assemblage mécanique laissait apparaître des discontinuités d'épaisseur, malgré toutes les précautions prises pour les éviter. Or, une discontinuité d'épaisseur inférieure à 0,01 mm est suffisante pour créer un point chaud et conduire à une destruction prématurée.The absence of continuity solutions is essential, without which there would be hot spots leading to premature destruction. Tests have shown that the superimposition of tubular layers by shrinking or mechanical assembly reveals thickness discontinuities, despite all the precautions taken to avoid them. However, a discontinuity of thickness less than 0.01 mm is sufficient to create a hot spot and lead to premature destruction.
Un procédé satisfaisant consiste, conformément à l'invention, à enfiler trois tubes, destinés chacun à former l'une des couches susdites, et à les co-marteler sur mandrin jusqu'à disparition de toute solution de continuité entre lesdits tubes.A satisfactory method consists, in accordance with the invention, of threading three tubes, each intended to form one of the above-mentioned layers, and co-hammering them on the mandrel until all solution of continuity between said tubes disappears.
L'absence de solutions de continuité peut facilement être vérifiée par examen au microscope de coupes longitudinales ou radiales du canon. Cependant, cette méthode destructive ne s'applique pas au contrôle de la fabrication. Dans ce cas, les examens sont réalisés par radiographie ou radioscopie ou encore par les techniques ultra-soniques.The absence of continuity solutions can easily be verified by microscopic examination of longitudinal or radial sections of the barrel. However, this destructive method does not apply to manufacturing control. In this case, the examinations are carried out by radiography or radioscopy or by ultra-sonic techniques.
On utilisera avantageusement un mandrin rayé pour le co-martelage, ce qui permet d'obtenir une ébauche rayée et réduit de ce fait les coûts de fabrication.Advantageously, a striped mandrel will be used for co-hammering, which makes it possible to obtain a striped blank and thereby reduces the manufacturing costs.
L'essai a démontré que la vie du canon composite déterminée sur la base d'un critère de précision de tir, était trois fois plus élevée que celle du canon conventionnel.The test demonstrated that the life of the composite gun, determined on the basis of a firing accuracy criterion, was three times higher than that of the conventional gun.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT80200826T ATE4393T1 (en) | 1979-09-26 | 1980-09-03 | PROCEDURE FOR MAKING A COMPOUND BARREL. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2058100 | 1979-09-26 | ||
BE2/58100A BE878999A (en) | 1979-09-26 | 1979-09-26 | COMPOSITE GUN AND METHOD FOR THE PRODUCTION THEREOF |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0026511A2 EP0026511A2 (en) | 1981-04-08 |
EP0026511A3 EP0026511A3 (en) | 1981-11-11 |
EP0026511B1 true EP0026511B1 (en) | 1983-08-03 |
Family
ID=3865475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80200826A Expired EP0026511B1 (en) | 1979-09-26 | 1980-09-03 | Method for manufacturing a composite barrel |
Country Status (6)
Country | Link |
---|---|
US (1) | US4409881A (en) |
EP (1) | EP0026511B1 (en) |
AT (1) | ATE4393T1 (en) |
BE (1) | BE878999A (en) |
DE (1) | DE3064492D1 (en) |
IL (1) | IL60981A (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE878999A (en) * | 1979-09-26 | 1980-03-26 | Herstal Sa | COMPOSITE GUN AND METHOD FOR THE PRODUCTION THEREOF |
DE3122316C2 (en) * | 1981-06-05 | 1992-08-27 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | Bullet barrel made of ceramic material |
US4577431A (en) * | 1984-05-02 | 1986-03-25 | General Electric Company | Wear resistant gun barrel and method of forming |
US4669212A (en) * | 1984-10-29 | 1987-06-02 | General Electric Company | Gun barrel for use at high temperature |
US5341719A (en) * | 1992-12-14 | 1994-08-30 | General Electric Company | Multi-layer composite gun barrel |
US5928799A (en) * | 1995-06-14 | 1999-07-27 | Ultramet | High temperature, high pressure, erosion and corrosion resistant composite structure |
US7964192B1 (en) * | 1997-12-02 | 2011-06-21 | Janssen Alzheimer Immunotherapy | Prevention and treatment of amyloidgenic disease |
SE516130C2 (en) * | 1999-03-15 | 2001-11-19 | Damasteel Ab | Substance for metal product, process for making metal product and metal product |
US6520360B1 (en) | 2001-10-19 | 2003-02-18 | Miner Enterprises, Inc | Housing for draft gear |
US7922065B2 (en) | 2004-08-02 | 2011-04-12 | Ati Properties, Inc. | Corrosion resistant fluid conducting parts, methods of making corrosion resistant fluid conducting parts and equipment and parts replacement methods utilizing corrosion resistant fluid conducting parts |
US7921590B2 (en) | 2006-02-23 | 2011-04-12 | Strum, Ruger & Company, Inc. | Composite firearm barrel reinforcement |
US20100236122A1 (en) * | 2006-07-26 | 2010-09-23 | Fonte Matthew V | Flowforming Gun Barrels and Similar Tubular Devices |
US8910409B1 (en) | 2010-02-09 | 2014-12-16 | Ati Properties, Inc. | System and method of producing autofrettage in tubular components using a flowforming process |
IT1402399B1 (en) * | 2010-10-21 | 2013-09-04 | Protec Surface Technologies S R L | PERFECT CANE. |
US8869443B2 (en) | 2011-03-02 | 2014-10-28 | Ati Properties, Inc. | Composite gun barrel with outer sleeve made from shape memory alloy to dampen firing vibrations |
US10118259B1 (en) | 2012-12-11 | 2018-11-06 | Ati Properties Llc | Corrosion resistant bimetallic tube manufactured by a two-step process |
US9546837B1 (en) | 2015-10-09 | 2017-01-17 | Bh5773 Ltd | Advanced gun barrel |
WO2021030801A1 (en) | 2019-08-15 | 2021-02-18 | Vista Outdoor Operations Llc | Devices and methods for extraction of high pressure cartridge casings |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US464978A (en) * | 1891-12-15 | Reinhard mannesmann | ||
CH2479A (en) * | 1890-06-16 | 1890-11-15 | Reinhard Jun Mannesmann | Barrel or barrel for firearms |
US1792082A (en) * | 1926-01-13 | 1931-02-10 | Chemical Treat Company Inc | Metallic coating and process of producing the same |
US2498052A (en) * | 1946-01-05 | 1950-02-21 | Nicol H Smith | Method of retarding erosion of gun barrels |
US2792657A (en) * | 1946-05-16 | 1957-05-21 | Battelle Development Corp | Gun barrel coated with tantalum |
US2799959A (en) * | 1947-06-11 | 1957-07-23 | Elburt F Osborn | Nitrided gun barrel with chromium deposit |
GB743111A (en) * | 1949-10-06 | 1956-01-11 | Birmingham Small Arms Co Ltd | Improvements in or relating to firearms |
BE552004A (en) * | 1952-10-24 | |||
CH347733A (en) * | 1956-02-29 | 1960-07-15 | Eidg Waffenfabrik | Gun barrel, in particular for automatic weapons, and process for the production thereof |
US3442172A (en) * | 1959-03-13 | 1969-05-06 | Fansteel Inc | Gun barrel liner |
US3261121A (en) * | 1961-10-13 | 1966-07-19 | Joseph R Eves | Gun barrel with explosively welded liner |
BE878999A (en) * | 1979-09-26 | 1980-03-26 | Herstal Sa | COMPOSITE GUN AND METHOD FOR THE PRODUCTION THEREOF |
-
1979
- 1979-09-26 BE BE2/58100A patent/BE878999A/en not_active IP Right Cessation
-
1980
- 1980-09-02 US US06/182,936 patent/US4409881A/en not_active Expired - Lifetime
- 1980-09-03 DE DE8080200826T patent/DE3064492D1/en not_active Expired
- 1980-09-03 EP EP80200826A patent/EP0026511B1/en not_active Expired
- 1980-09-03 AT AT80200826T patent/ATE4393T1/en not_active IP Right Cessation
- 1980-09-05 IL IL60981A patent/IL60981A/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP0026511A2 (en) | 1981-04-08 |
BE878999A (en) | 1980-03-26 |
ATE4393T1 (en) | 1983-08-15 |
DE3064492D1 (en) | 1983-09-08 |
US4409881A (en) | 1983-10-18 |
EP0026511A3 (en) | 1981-11-11 |
IL60981A (en) | 1983-05-15 |
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