摘要:
Methods of manufacturing metal, metal-matrix, metal-metal-matrix composite weapon barrels offer barrels with improved thermal performance and rigidity with no, minimal or negative weight increase. A barrel may include a barrel core surrounded by a lightweight, thermally conductive sleeve made from metal, metal-matrix composite (MMC) materials, also referred to as metal-matrix material. The barrel core and barrel sleeve may include aligning features to prevent separation and movement of the sleeve along the core. The disclosed methods provide for material combinations and part designs that prevent separation of their parts over the life of the weapon barrel and allow the barrel to perform at high cadence over the whole temperature range the barrel is used.
摘要:
A hybrid metal and composite barrel assembly for a firearm preferably includes a metal inner barrel liner and a composite outer barrel sleeve. The composite outer barrel sleeve preferably includes at least one layer of woven metal mesh material comprising a plurality of metallic fibers, and at least one layer of carbon fiber material comprising a plurality of carbon fibers. The composite outer barrel sleeve is preferably engaged around the metal inner barrel liner, and optionally incorporates a tensioning nut to retain the sleeve on the liner.
摘要:
A hybrid metal and composite barrel assembly for a firearm preferably includes a metal inner barrel liner and a composite outer barrel sleeve. The composite outer barrel sleeve preferably includes at least one layer of woven metal mesh material comprising a plurality of metallic fibers, and at least one layer of carbon fiber material comprising a plurality of carbon fibers. The composite outer barrel sleeve is preferably engaged around the metal inner barrel liner, and optionally incorporates a tensioning nut to retain the sleeve on the liner.
摘要:
A modular barrel system for firearm includes a first barrel segment and a second barrel segment. Each barrel segment comprises a tubular member having an axial bore, a proximal end, and a distal end. The proximal end of the first barrel segment has a first threaded element for removably attaching the first barrel segment to a firearm. The distal end of the first barrel segment has a second threaded element and the proximal end of the second barrel segment has a third threaded element which is complementary with the second threaded element, the third threaded element for removably attaching the second barrel segment to the first barrel segment. In a further aspect, method for the manufacture of a modular barrel system are provided.
摘要:
A gun barrel assembly includes an outer barrel tube, an inner barrel liner, a barrel breech cap and a barrel muzzle cap. The barrel tube and the barrel liner each longitudinally extend from a muzzle end to a breech end, and have axial through bores, with the barrel liner being disposed within and coaxial with the barrel tube bore. The breech cap and the muzzle cap each longitudinally extend from a front end to a rear end and have through axial through bores. The breech cap is mounted to the barrel liner breech end portion and contacts the barrel tube breech end. The muzzle cap is mounted to the barrel liner muzzle end portion and contacts the barrel tube muzzle end. The inside diameter of the barrel tube bore is greater than the outside diameter of the barrel liner whereby the barrel tube does not contact the barrel liner.
摘要:
A composite gun barrel comprising:an inner rifled liner tube having an outer surface; andan outer sleeve made from a shape memory alloy and having an inner surface for disposition against the outer surface of the inner rifled liner tube;wherein the inner rifled liner tube is configured for guiding projectiles and the outer sleeve is configured for dampening the firing vibrations encountered by the inner rifled liner tube.
摘要:
Disclosed is a method for making a non-metallic, fiber-reinforced barrel tube having particular application for use in a barrel system to be attached to a paintball marker in order to direct paintballs propelled by the marker towards a target. A mandrel is first dipped in a releasing agent. The mandrel is then coated with a thin layer of metal (e.g., nickel or chrome) by means of a nano vapor deposition process. Next, a fiber-reinforced resinous sheet is wrapped over the thin metal layer to establish a tube therearound. A heat-sensitive plastic tape is wound around the tubular resinous sheet. The mandrel is heated in an oven to cause the thin metal layer to bond to the tubular resinous sheet. At the same time, the heat-sensitive tape shrinks to squeeze any air bubbles from the resinous sheet. After heating and curing, the mandrel is pulled outwardly from the tubular fiber-reinforced resinous sheet to produce a hollow, cylindrical barrel tube ready for cutting to size and machining so as to be coupled to the paintball marker.
摘要:
An electrical energy-insulating, preferably ceramic, insert (15) which is fitted in a barrel (2) is adapted in order to prevent electrical energy transmission (16) from an electric igniter (3) to a barrel body on firing of an ammunition unit (11) which can be initiated with the electric igniter (3). The insert is arranged in a position for firing of the ammunition unit. By means of the invention, a simple solution is obtained to the problem of electrical energy transmission by virtue of the fact that other measures do not have to be taken, for example the cases of the ammunition units do not have to be adapted by complicated and cost-increasing measures.
摘要:
Provided is a methodology and system for applying coatings onto the interior surfaces of components. The approach comprises a vapor creation device (for example an electron beam or laser that evaporates a single or multiplicity of solid or liquid sources), a vacuum chamber having a moderate gas pressure (between about 10−4 to about 103 Torr) and a inert gas jet having controlled velocity and flow fields of gas jet. The gas jet is created by a rarefied, inert gas supersonic expansion through a nozzle. By controlling the carrier gas flow into a region upstream of the nozzle an upstream pressure is achieved (i.e. the gas pressure prior to its entrance into the processing chamber through the nozzle). The carrier gas flow and chamber pumping rate control the downstream (or chamber) pressure (i.e., downstream of the nozzle). The ratio of the upstream to downstream pressure along with the size and shape of the nozzle opening controls the speed of the gas entering the chamber. The carrier gas molecular weight (compared to that of the vapor) and the carrier gas speed controls its effectiveness in redirecting the vapor atoms via binary collisions towards the substrate. The speed and flux of the atoms entering the chamber, the nozzle parameters, and the operating chamber pressure can all vary leading to a wide range of accessible processing conditions. Vapor created from a source is transported into the interior regions of a component using binary collisions between the vapor and gas jet atoms. Under certain process conditions these collisions enable the vapor atoms to scatter onto the interior surfaces of the component and deposit.
摘要:
A gun barrel that can be used to fire projectiles. The gun barrel may be used in satellite-launching operations, in artillery operations, or in fire-fighting operations. The gun barrel has an outer support layer, an inner support layer lining the bore of the gun barrel and a compressible material disposed between the outer support layer and inner support layer. The support layers may be steel, and the compressible material may be concrete. In one embodiment, the breech portion is made of a metal, for example, steel, and the remainder of the gun barrel is made of an inner support layer an outer support layer and a layer of compressible material therebetween. The gun barrel of this invention is less expensive to make and lighter than a similarly-sized gun barrel made of steel, while being sufficiently strong to launch large projectiles.