Abstract: A process for manufacturing a spool valve whereby a plurality of quenching processed collars are fitted to a shaft material so that the collars are arranged at predetermined positions on the shaft material. The collars have respective substantially central holes through which the shaft material extends. The diameter of portions of the shaft material is contracted in a vicinity of both opposite ends of each of the collars by rolling dies so as to cause plastic flow of a metal constituting the shaft material. Pairs of circular convex portions are then formed on outer circumferential faces of the diameter contracted portions of the shaft material.

Abstract: A clutch drum is formed from a single piece of material. The clutch drum includes an inner surface having a plurality of spline portions interspersed with inner wall spaces. Each spline portion includes at least one slot to form at least one snap ring groove within the clutch drum. The outer surface of the clutch drum is smooth and continuous and adapted to receive a brake band. The clutch drum does not include any perforations or breaks through the single piece of material forming the cylindrical portion of the clutch drum.

Abstract: A water-cooled, two-stroke crankcase compression internal combustion engine for powering a motor vehicle. The engine includes a piston, piston rings, and cylinder bore arrangement that are constructed to inhibit piston ring sticking by cooling the piston ring gaps by holding them against rotation and spraying fuel from a fuel injector toward the gap for cooling it. Overheating of the small end of the connecting rod is inhibited by surface treating portions of the piston to render them harder and less heat conductive. Scuffing of the piston, piston rings, and cylinder bore are reduced by surface treating the area of the head of the piston around the ring grooves so as to trap and retain lubricant. The surface treatment includes the steps of utilizing an acid wash to dissolve and remove silicon particles and subsequently alumitc treating the washed area.

Abstract: An automatically assembling method to connect two members while providing an intermediate member therebetween, including first, second, and third steps. In the first step, a first member and a second member are connected together without interposing the intermediate member therebetween. In the second step, the first and second members are separated away from each other in a predetermined direction, and the first member is set in a predetermined position with respect to the intermediate member while keeping a positioning relationship with the second member. In the third step, the first and second members are approached and connected to each other while providing the intermediate member therebetween.

Abstract: A power steering control valve (22) has an inner valve member (40) which is connected with a follow-up member (54) by a torsion bar (102). An outer valve member (42) is fixedly connected with the follow-up member (54) by indentations (56). Before the outer valve member (42) is fixedly connected with the follow-up member (54) by the indentations (56), the inner and outer valve members (40 and 42) are moved relative to each other to determine a hydraulically centered condition. When the power steering control valve (22) is in the hydraulically centered condition, equal fluid pressures are conducted to a power steering motor (31) in response to equal clockwise or counterclockwise actuation of the valve members (40 and 42) relative to each other. The outer valve member (42) is then fixedly connected with the follow-up member (54) with the power steering control valve (22) in the hydraulically centered condition.

Abstract: A method is provided for installing an oil pan heater on an oil pan while the oil pan is mounted on an engine block. Oil is drained from the engine oil pan. Then the engine oil pan is pierced to provide a pilot hole having pierced ends extending into the engine oil pan. A circular chamfered groove is formed surrounding the pilot hole so as to provide an oil pan thickness at a base of the chamfered groove. A pull is inserted into the oil pan through the pilot hole to engage an internal portion of the oil pan surrounding the pilot hole. The pull extracts a circular slug from the oil pan and a substantially circular hole is formed in the oil pan. An expandable heater bushing is inserted in the substantially circular hole. The heater bushing has an expandable tubular section extending from an enlarged head. The tubular section is crimped and the enlarged head is sealed to the oil pan. Then the heater is attached to the enlarged head.

Abstract: A casing forming a liquid tank is welded through coupling brackets to a first header pipe forming a condenser by brazing. This coupling brackets are smaller in thermal capacity than the casing and the first header pipe.

Abstract: The welding method for repairing a turbine rotor dovetail includes removal of buckets from damaged dovetails, removing a damaged dovetail from a turbine wheel, leaving a rotor wheel body having a rim. A plurality of ring sections are disposed about the wheel body rim, leaving axially opening annular grooves along opposite sides of the wheel. Welding apparatus including an electrode, welding wire and gas-carrying tube are inserted into the groove through an axial face of the wheel. One or more cover plates are disposed to overlie the groove at the location of its opening through the axial face of the wheel to at least partially seal the groove at its opening and maintain welding gas in the groove, enveloping the electrode and weld wire.

Abstract: A flat plate is molded in such a manner that a pair of semidivided cylindrical portions are arranged in parallel to each other with an arc-shaped connecting portion between them. Tube insertion holes are formed in one of the pair of semidivided cylindrical portions. Then, the connecting portion is projected from the inside thereof to thereby dispose the pair of semidivided cylindrical portions in such a manner that they are opposed to each other. The mutually opposed semidivided cylindrical portions are butted against each other, thereby manufacturing a cylindrically-shaped header pipe. The tube insertion holes are formed only in one of the pair of semidivided cylindrical portions in such a manner that the tube insertion holes are not allowed to extend up to the connecting portion.

Abstract: A method for repairing gas turbine engine airfoil parts. The dimensional differences between pre-repaired dimensions of a turbine engine airfoil part and desired post-repair dimensions of the turbine engine airfoil part are determined. A build-up thickness of coating material required to obtain the desired post-repair dimensions of the turbine engine airfoil part is determined. A high-density coating process, such as HVOF, is used to coat the turbine engine airfoil part with a coating material to the determined build-up thickness of coating material effective to obtain the desired post-repair dimensions after performing a sintering heat treatment and a hot isostatic pressing treatment, and, if performed, a re-application of a protective coating. The coating material comprises a metal alloy capable of forming a diffusion bond with the substrate of the turbine engine airfoil part.

Abstract: A receiving cavity having a simple geometrical shape is machined in a metallic block having a simple geometrical shape made of a first metallic material. A member made of the second material is made and fixed into the cavity to produce a composite bimetallic block, and the turbine blade is machined from the composite block, the body of the blade being machined from the metallic block made of the first material and the insert being machined from the member of simple shape made of the second material. The member made of the second material can be prefabricated and welded into the cavity of made by depositing and solidifying a molten metal in the cavity. The invention applies in particular to manufacturing a blade of a low-pressure stage of a steam turbine.

Abstract: The process and apparatus avoid incorrect assembly and added expense caused by prior art alternating manual and equipment-reinforced assembly operations. Full automation is attained in that the component group is picked up by a robot and transferred to a press-fitting unit. Once the crankcase and the crankshaft, with the aid of rotary and adjusting devices, have been rotated into an assembly position for the piston and the connecting rod, the component group is introduced into a cylinder opening until the connecting rod contacts the crankshaft. The robot then picks up a connecting rod cap that has already been equipped with screws and screws it together with the connecting rod.

Abstract: A simple joining process for members of passive microwave structures is described which reduces passive intermodulation. The process forms an aperture in a first member and forms a second member to have dimension which exceeds the aperture dimension by a dimension differential. The members are joined by initially causing them to have a temperature differential that is sufficient to permit the second member to be positioned across the aperture. The dimension differential is selected to generate mutually-induced radial stresses in the members, after the temperature differential is removed, which enhance the metal-to-metal contact between the members and, thereby, improve passive intermodulation (PIM) performance. Preferably, the dimension differential is selected to cause the second member to elastically buckle and exert a buckling stress against the first member. Additional interface structures are provided to resist operational axial forces, e.g., vibration, that tend to dislodge the members.

Abstract: An apparatus and method for automatically assembling a plurality of identical first articles onto a second article. The second article is supported by a platform which is movable about three linear axes and three rotational axes by a six-axis positioning device. The first articles are held in a fixed position and the second article is positioned so as to insert the first articles into the second article as required. In the preferred embodiment, a torque converter turbine drum is supported by the platform to engage turbine blades which are supported in fixed position with respect thereto. The turbine drum is rotated with respect to the blades so as to permit the insertion of the blades into the drum by rotation and positioning of the drum in six axes.

Abstract: A method for disposing of a radioactively contaminated steam generator with a multiplicity of U-shaped heating tubes fixed in a tube plate, includes cutting off the heating tubes above the tube plate, cutting open the dome of the steam generator and gripping the heating tubes one after the other at the U-bend with force-locking measures. Once gripped, each heating tube is drawn through crushing rollers to achieve an initial reduction in size and to reduce a bend radius of the tube and is then passed into a press where it is pressed flat.

Abstract: A method for manufacturing a cylinder for a two-stroke internal combustion engine provided with a pair of hollow scavenging passages, which comprises the steps of casting a raw cylinder body provided with the hollow scavenging passages and forming scavenging ports and/or air-fuel mixture inlet ports communicating respectively with said scavenging passages in the raw cylinder body by means of non-contact machining method.

Abstract: Methods and apparatus for coupling heat exchange tubing to header pipes which include flanges are disclosed. Heat exchange tubing may generally be coupled, or bonded, to header pipe arrangements in order to produce heat exchanging devices which may be used in solar heating systems and thermal energy storage (TES) devices. According to one aspect of the present invention, a method for forming a heat exchanging device includes pretreating the ends of the heat exchange tubes used in the device. The pretreated ends are then heated to at least partially melt the pretreated ends. At the same time, heat is also applied to the header pipe arrangement included in the device to at least partially melt a flange arrangement which is a part of the overall header pipe arrangement. The pretreated ends of the heat exchange tubes are then sealed against the header pipe arrangement.

Abstract: The invention relates to a device and a method for the assembly of a sliding sunroof frame and for the adjustment of a cover connected with it in a vehicle. The device has a tool that has one portion that can be introduced into the body of a vehicle and another portion that can be positioned above a roof opening of the vehicle. A positioning assembly for the sliding sunroof frame and the cover and various adjusting component with centering devices are provided on a floating frame on part of the tool positioned in the vehicle body, and allow fully automated raising and alignment, as well as fastening of the sliding sunroof frame to the vehicle roof and complete adjustment without play and fastening of the sliding sunroof cover to its tilting mechanism.

Abstract: A heat spreader for a semiconductor device is constituted by an integral laminate of alternatingly stacked and diffusion-bonded Fe--Ni alloy sheets and copper-group metal sheets, the laminate having a one-directional stripe pattern of the Fe--Ni alloy sheets and the copper-group metal sheets, which appears on a planar surface on which a silicon chip is disposed. It is produced by (a) alternatingly stacking Fe--Ni alloy sheets and copper-group metal sheets, (b) hot isostatic-pressing the resulting stack of the metal sheets to form a slab, (c) rolling the slab vertically to the laminating direction of the metal sheets to form an integrated stripe-pattern laminate, and (d) cutting the integrated stripe-pattern laminate to a predetermined shape.

Abstract: Manufacture of a fluid connector fitting from an elongate metal stock, such as a plate or barstock, or a billet having an indefinite length and the potential for one or more centerline inhomogeneities which may extend along a longitudinal central axis thereof. In one embodiment, a metal stock is provided as having a cross-section of a first dimension which may be at least about equal to the extent of a first or second widthwise extent of the fitting and a second dimension which is at least about twice the extent of the other widthwise extent of the fitting. The stock is sectioned through the second dimension thereof along its longitudinal central axis to equally divide it into at least first and second workpieces. Each of the workpieces extends along a corresponding longitudinal axis thereof and has a cross-section of a first and a second width which may correspond, respectively, to the first and second widthwise extents of the fitting.