Abstract:
This invention relates generally to a method for repairing a casting (10), and more specifically to a method of repairing a casting (10) by pouring melted filler material into a damaged portion of the original casting. Damaged cast metal components (10), such as a cylinder head of an internal combustion engine are repaired by preheating the component (10) to a first preheat temperature. The damaged area of the casting (10) is then heated to a higher temperature using a torch and melted filler material is poured into the casting (10). The torch is used to maintain the temperature of the melted material for thirty seconds to two minutes. The temperature of the filler material is then cooled using compressed air.
Abstract:
A remanufactured planet carrier (11) is disclosed having a first plate (12) and a second plate (13) spaced apart from and oriented generally parallel to the first plate (12). Supports (28) join and support the first (12) and second (13) plates. The remanufactured planet carrier (11) further has a plurality of first pin bores (14) in the first plate (12) and a plurality of second pin bores (15) in the second plate (13). The first pin bores (14) are parallel and generally aligned with the second pin bores (15). A cylindrical member (17) extends from a central axis of the second plate (13) away from the first plate (12) with a shaft bore (16) formed within the cylindrical member (17). The first (14) and second (15) pin bores and the shaft bore (16) each have a surface layer (26) with a hardness of at least about 180 BHN and a strength of at least about 500 MPa.
Abstract:
A method for restoring a worn rail section includes cleaning a worn surface of a rail section to expose a clean metal surface, heating the rail section to a first temperature before welding, welding new metal on the clean metal surface of the rail section after heating the rail section to the first temperature, heating the rail section to a second temperature after the welding to heat-treat a heat-affected area caused by the welding, and shaping the rail section, wherein the welding is performed by a gas metal arc welding
Abstract:
L'invention concerne un procédé de réparation des structures primaires d'aéronef. Plus particulièrement, l'invention concerne un procédé adapté à la réparation de dommages subis par le revêtement (1) d'un fuselage d'aéronef lequel revêtement est constitué d'un matériau composite à renfort fibreux. Ce procédé comprend une étape consistant à réaliser une découpe (11) de contour sensiblement parallélépipédique du fuselage autour du dommage et à percer un orifice circulaire (10) sensiblement centré sur l'intersection des côtés du contour du parallélépipédique de la découpe en chacun des sommets dudit contour préalablement à l'opération de découpe.
Abstract:
A method for repairing" a degraded bolt hole in a casing flange by reaming and removing at least some corrosion on an inside and around the hole to form a reamed hole, mounting the flange to float relative to upper and lower electrodes of a welding machine, radially and axially clamping an area of the flange surrounding the reamed hole, placing upper and lower filler slugs in the reamed hole, placing the electrodes against upper and lower filler slugs and applying a welding current through the electrodes while applying pressure to the filler slugs with the electrodes and resistively heating- and melting- the filler slugs to form a weldment, and pulsing the welding current on and off. Pulsing may be performed with progressively increasing amounts of current. In situ tempering under the pressure of the electrodes may be performed on a substantially liquid pool formed by the welding current.
Abstract:
A method of manufacturing a fuel injector (10, 110, 210) having high-flow orifices (320) in its tip (13, 113, 213) includes removing a bulb (332) from a fuel injector tip (13, 113, 213) having at least one spray orifice (320) with a first diameter, and friction welding a slug (16) to the fuel injector tip (13, 113, 213), including forming a fused interface of material of the slug (16) and material of the fuel injector tip (13, 113, 213). The method further includes modifying the slug (16) subsequent to friction welding the slug (16) to the fuel injector tip (13, 113, 213), including forming a new bulb (32, 132, 232) from the slug (16) having at least one spray orifice (20, 120, 220) therein with a different diameter than that of the removed bulb (332). A remanufactured fuel injector (10, 1 10, 210), and fuel injector tip (13, 113, 213), includes an injector tip body having a first tip portion (14, 114, 214) of a first material and a second tip portion (16, 1 16, 216) of a material compatible for friction welding with the first material. The injector tip body further includes a third tip portion (18, 118, 218) attaching the first tip portion (14, 114, 214) to the second tip portion (16, 116, 216), the third tip portion (18, 118, 218) including a friction weld formed during remanufacturing of the fuel injector tip (13, 113, 213).
Abstract:
An idler assembly is disclosed for a shovel having a flexible track assembly. In an embodiment, the idler assembly comprises an idler gear operatively associated with the track assembly; a sleeve; a shaft, sets of splines on the shaft and on the sleeve sized for engagement, and connectors at ends of the shaft; at least one bearing block forming a bore therethrough; at least one bushing liner disposed within at least one bearing block; and at least one retaining device for constraining the shaft from withdrawal from the bearing block. A method for retrofitting a shovel with an existing idler assembly is disclosed. In an embodiment, the method comprises positioning at least one bushing liner within a bore of at least one bearing block; attaching an idler shaft and an idler gear together; and positioning the idler shaft within the at least one bushing liner.
Abstract:
A wall of a mold assembly for the continuous casting of steel has a steel back-up plate. A thermally conductive plate composed of copper or a copper alloy is bolted to the back-up plate and a relatively thin copper or copper alloy facing is soldered to that surface of the thermally conductive plate which faces away from the back-up plate. The thermally conductive plate may be omitted and the facing soldered to the back-up plate. The facing contacts and cools a continuously cast strand travelling through the mold. When the facing becomes cracked or worn beyond repair, the solder joint is melted to remove the facing and a fresh facing is soldered to the thermally conductive plate or back-up plate.
Abstract:
A component of a rotary wing aircraft is provided including a surface configured to contact another component of the rotary wing aircraft such that the surface is susceptible to corrosion and/or pitting. The surface has an area from which a portion of material was removed. A structural deposit is formed by cold spraying one or more layers of powdered material within the area. The structural deposit is configured to carry a load applied to the component.