Abstract: Methods are disclosed for fabricating heat exchangers and Heat Exchanger (HX) tubes, as are heat exchangers fabricated in accordance with such methods. In embodiments, the method includes the steps or processes of obtaining a Non-Equilibrium Alloy (NEA) feedstock powder comprised of an alloy matrix throughout which at least one minority constituent is dispersed. The first minority constituent precipitates from the alloy matrix when the NEA feedstock powder is exposed to temperatures exceeding a critical temperature threshold (TCRITICAL) for a predetermined time period. A cold spray process is carried-out to at least partially form the HX tubes from the NEA feedstock powder; and the HX tubes are subsequently installed in the heat exchanger. The HX tubes are exposed to a maximum temperature (TSPRAY_MAX) during the cold spray process, which is maintained below TCRITICAL to substantially preserve the non-equilibrium state of the NEA feedstock powder through cold spray deposition.

Abstract: The methods disclosed herein of generating three-dimensional lattice structures and reducing stress shielding have applications including use in medical implants. One method of generating a three-dimensional lattice structure can be used to generate a structure lattice and/or a lattice scaffold to support bone or tissue growth. One method of reducing stress shielding includes generating a structural lattice to provide sole mechanical spacing across an area for desired bone or tissue growth. Some examples can use a repeating modified rhombic dodecahedron or radial dodeca-rhombus unit cell. Some methods are also capable of providing a lattice structure with anisotropic properties to better suit the lattice for its intended purpose.

Abstract: A method for manufacturing impellers is described. The method provides for manufacturing a plurality of tubular components, each tubular component forming an inner passage, which is shaped as one of the flow passages of the final impeller. The tubular components are assembled together forming a semi-finished impeller. The semi-finished impeller is provided with annular cavities extending around the rotation axis of the impeller and gaps between adjacent tubular components. The gaps and cavities are filled with metal powder and the semi-finished impeller is subject to hot isostatic pressing, to densify the metal powder and form a monolithic final impeller.

Abstract: A method of manufacturing a heat exchanger comprising a body and a support embedded within the body. The support comprises a different material and/or a different material structure to the body and hence has at least one material property which is different to that of the body. The method comprises; forming at least a first portion of the support with a first material and a first material structure using a first additive manufacturing step; and forming at least a first portion of the body with a second material and a second material structure using a second additive manufacturing step. The first material is different to the second material and/or the first material structure is different to the second material structure.

Abstract: Apparatus and method for assembling a non-rotating wheel cap. A bearing is seated in either an outer disk of an inner disk as a first assembly step. A weight is in the form of an arc between 90 and 110 degrees and resides in a pocket formed in the outer disk. An adapter disk is attachable to the inner disk to allow customizing for various wheel fitment. A center ornamental portion may be a custom part or may be cut from an original fixed wheel center cap is cut from the fixed center cap, and attached to the outer disk converting the fixed center cap to a non-rotating center cap.

Abstract: A rotary barbeque apparatus with a forward-reverse motor includes a machine, a cover, a barbeque tray, an electric heating tray, a temperature detection device, and a barbeque rack. A drive motor is installed at an end of the barbeque rack. The temperature detection device includes a temperature sensor and a temperature control device. The temperature sensor transmits a detected temperature to the temperature control device through a transmission cable. The drive motor is a forward-reverse motor. The temperature sensor is a probe directly inserted into a barbeque food for detecting the temperature of the barbeque food, so that a user may determine whether or not the food is cooked to effectively prevent the barbeque food from producing harmful chemical substances by a too-high temperature. To prevent damaging the transmission cable of the temperature sensor in the rotation of the barbeque rack, a forward-reverse rotating drive motor is adopted.

Abstract: A pipe joint device configured to interconnect two pipes to be inserted therein through openings of both opened ends thereof including a joint main body and a joint assembly disposed in the joint main body is provided. The joint main body includes a small-diameter part formed at a central part and large-diameter parts formed at both sides of the small-diameter part. Each of the large-diameter parts has a first horizontal part, a diameter-reduced part of which a diameter gradually decreases from the first horizontal part toward the opening, and a second horizontal part extending horizontally from the diameter-reduced part toward the opening. A portion of each of the second horizontal parts is configured as a curled part inclined toward an outer-diameter direction and the opening of the pipe joint device and then again inclined toward an inner-diameter direction and the opening and having a mountain-shaped section as a whole.

Abstract: Methods for servicing shock struts are provided. In various embodiments, a method for servicing a shock strut may comprise deflating the shock strut; compressing the shock strut until the shock strut is in a fully compressed position; and charging the shock strut with a liquid until a pressure of the liquid decreases a volume of a residual air located inside of the shock strut. In various embodiments, charging the shock strut with liquid under pressure may reduce the volume of trapped air inside of the shock strut to a negligible volume, eliminating the servicing variations.

Abstract: A method of constructing a gas turbine system may include placing a foundation interface of a gas turbine mannequin on a foundation, aligning the gas turbine mannequin with a load and connecting the gas turbine mannequin to the load. The method may include constructing a pipeline and connecting the pipeline to the gas turbine mannequin. The method may include placing a foundation interface of a gas turbine mannequin on a foundation, aligning the gas turbine mannequin with an exhaust structure and connecting the gas turbine mannequin to the exhaust structure. The method also includes removing the gas turbine mannequin and installing a gas turbine.

Abstract: An acoustical panel apparatus includes a laminate panel substrate that is receptive to ink printing operations. The substrate may be provided with folding grooves to form an apertured base, a sidewall, and an inner wall which together define a receptacle. An acoustical tuning body is positionable at the receptacle to attenuate at least one of sound transmissions and sound reflections from sound passing through the apertures in the base. A mounting bracket is attached to the panel to secure the acoustical tuning body at the receptacle and for mounting the panel substrate to a wall or ceiling.

Abstract: A near-net shape forming method for fabricating the precise bearing ring forging is invented. The processing method is composed of following three procedures. (1) the precise ring-like billet with chamfer angle is manufactured by the machining method. (2) The billet is heated by the less oxidation or non-oxidation heating method before ring rolling. (3) The bearing ring forging integrating with the raceway is formed in one pass of the rolling process by the ring rolling method.

Abstract: The present disclosure provides a method for molding a pipe body that can inexpensively mold a pipe body having a tapered portion radially outwardly projecting relative to a large-diameter portion. The method for molding a pipe body comprises: molding of a tubular body by bending an unfolded stock so as to wrap a core metal; and removal of the core metal from inside the tubular body. The core metal comprises a first core metal piece for molding a projecting portion of the tapered portion. During the molding of the tubular body, the first core metal piece at least partly abuts on an inner surface of the projecting portion of the tapered portion, and does not abut on an area of the inner surface of the large-diameter portion located in an opposite side of a central axis of the large-diameter portion from the projecting portion.

Abstract: A plastic container used for holding fluid material with an attachable handle is provided. The container includes a body, a plurality of walls, a spout, an attachable handle and a sliding structure. The spout is a hollow, cylindrical portion that extends from an opening in one of the walls. The cylindrical portion is configured to insert or remove the fluid material from the container. The attachable handle includes a rail structure that further includes a pair of non-parallel offset rails and a latch. The latch has a latching surface that is located at the ends of the offset rails farthest from each other. The slide structure includes a generally rectangular projection. The projection further includes a pair of non-parallel offset grooves and a latching surface. The latching surface is located where the grooves are farthest from each other. The offset grooves are adapted to mate with the offset rails and are fully engaged by the offset rails when the latch is engaged with the latching surface.

Abstract: A method of making a sheath for an airfoil may include the steps of forming an upper sleeve and a lower sleeve, and forming a central portion bonded to the upper sleeve and the lower sleeve. The central portion may be formed by depositing a material on the upper sleeve and the lower sleeve. A portion of the material may be removed from at least one of the central portion, the upper sleeve, or the lower sleeve. The sheath may include a first flank, a central portion bonded to the first flank, and a second flank bonded to the central portion. The central portion may have a substantially uniform microstructure resulting from additive manufacturing.

Abstract: There is provided a method of assembling a worm reducer, which includes causing a worm wheel to be rotatably supported in a wheel accommodation part, externally fitting a pair of bearings at tip-side and base-side positions of a worm, inserting the worm into a worm accommodation part from an opening side thereof at a state where the worm is offset outward in a radial direction of the worm wheel with respect to a center axis of the worm accommodation part, causing the bearing which is externally fitted to a leading side in an insertion direction of the worm to pass an outer diameter-side of a part of an outer peripheral edge of the worm wheel, which protrudes most into the worm accommodation part, causing the worm teeth to mesh with the worm wheel, and further inserting the worm to a predetermined position in the worm accommodation part.

Abstract: The present invention provides a metal sheet, on a first surface of which a resist pattern having a narrow width can be stably provided. This manufacturing method for a metal sheet includes a preparation step of preparing a sheet material comprising an iron alloy that contains nickel. When a composition analysis of the first surface of the metal sheet obtained from the sheet material is performed using X-ray photoelectron spectroscopy, the ratio A1/A2 obtained by the result of the X-ray photoelectron spectroscopy does not exceed 0.4, where A1 is the sum of the peak area value of nickel oxide and the peak area value of nickel hydroxide, and A2 is the sum of the peak area value of iron oxide and the peak area value of iron hydroxide.

Abstract: A composite torque pipe to metal fitting joint including concentric inner and outer shells formed with respective smooth annular surfaces projecting distally to form an annulus of a predetermined configuration for receipt of a composite connector ring of the predetermined configuration.

Abstract: A cylinder head material of an engine is casted (Step S1). Next, the cylinder head material is machined (Step S2). Next, a heat shielding film is formed on a ceiling surface of the cylinder head material (Step S3). Next, the film thickness of the heat shielding film is measured (Step S4). Next, a rank of a piston to be combined with the ceiling surface is selected (Step S5). The rank of the piston selected in Step S5 is a rank according to depth of a cavity. Next, the rank of the piston selected in Step S5 is stamped on the cylinder head (Step S6).

Abstract: Provided is a mechanical joining apparatus enabling reduction of breakage of the area around a rivet of a joint obtained by riveting, the apparatus comprising a punch and die, blank holder, first power device, second power device and cooling device, wherein the first power device is configured to start supply of current through the holder and die so as to raise the temperature of the sheets before the punch drives in the rivet, the second power device is configured to start supply of current through the punch and die so as to supply current through and heat treat the rivet after the punch drives in the rivet, and the cooling device is connected to the punch and is configured to cool the rivet after the rivet is heat treated.

Abstract: Disclosed is a method of making an integrally bladed rotor. According to the method, a titanium alloy rotor disk with 15-50% by volume of primary alpha grains with a grain size less than 10 ?m and secondary alpha grains comprising widmanstatten grains with a grain size less than 1.0 ?m is subjected to thermal processing. After thermal processing, a blade having an airfoil and a base is positioned such that a base surface is in contact with an outer rim surface of the disk. Heat, pressure, and motion are applied between the blade and the disk to friction weld the base surface to the disk outer rim surface.