A thermoacoustic device 10 comprises: a prime mover 30 that includes a heat accumulator 50A, a first heat exchanger 60A that is provided with a first heat transfer tube 61 in which a heating medium can flow, and a second heat exchanger 70A that is provided with a second heat transfer tube 71 in which a coolant can flow; piping 20 in which the prime mover 30 is accommodated in the inside, and in which a working gas can be filled; and a water jacket 90 that is attached to the piping 20 and in which a coolant for cooling the piping 20 can flow. The piping 20 is provided with accommodation piping 23A in which the prime mover 30 is accommodated in the inside and which has one end 231A located on the first heat exchanger 60A side and the other end 231B located on the second heat exchanger 70A side, first main piping 21A that is connected to the one end 231A of the accommodation piping 23A, and a heat-insulating member 80 that is interposed between the accommodation piping 23A and the first main piping 21A and that has lower heat conductivity than the accommodation piping 23A and the first main piping 21A, the water jacket 90 being attached to the first main piping 21A.
The present invention controls a degradation in a thermoacoustic effect caused by unevenness in the temperature difference between a first heat exchanger and a second heat exchanger. This energy converter is built into a thermoacoustic device having a working gas sealed therein and performs energy conversion between thermal energy and acoustic energy. The energy converter comprises a heat accumulator, a first heat exchanger that is arranged facing one surface of one heat accumulator, and a second heat exchanger that is arranged facing another surface of the heat accumulator. The first heat exchanger is formed with a first high-temperature portion and a first low-temperature portion that have different temperatures, and the second heat exchanger is formed with a second high-temperature portion and a second low-temperature portion that have different temperatures. The first high-temperature portion in the first heat exchanger and the second high-temperature portion in the second heat exchanger face each other, and the first low-temperature portion in the first heat exchanger and the second low-temperature portion in the second heat exchanger face each other.
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
H04R 23/00 - Transducteurs autres que ceux compris dans les groupes
Provided is a production method for a thermal accumulator 50 that is used in a thermoacoustic device 10, said method comprising: a layering step for stacking a plurality of metal meshes 51 to obtain a layered body 52; a compression step for pressing the layered body 52 and maintaining a compressed state; and a fixing step for providing a fixing body to an outer peripheral surface 52F of the layered body 52 while the compressed state is maintained in the compression step, and fixing the outer peripheral surface 52F of the layered body 52.
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
H04R 23/00 - Transducteurs autres que ceux compris dans les groupes
A manufacturing method of a vehicle wheel includes forming, on a front surface of the vehicle wheel, a cutting surface having a contour shape following a target contour shape that defines the shift of a target position in the axial direction relative to a position in the radial direction. The target contour shape includes an arcuate first fillet portion, a linear first flat portion, and a recess-projection portion having a recess-projection shape in which recessed portions and projection portions are provided alternately. The width of the first flat portion in the radial direction is equal to or more than twice the amount of feed per rotation in the lathe turning but equal to or less than a first predetermined distance.
B23B 5/28 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour tourner des roues ou des trains de roues ou leurs manivelles, c.-à-d. tours à roues
A wheel for a vehicle includes a plurality of Helmholtz resonators each including an auxiliary air chamber communicating with a tire air chamber through a communication hole. The Helmholtz resonators include one or more first Helmholtz resonators set to have a silencing characteristic for a first-order resonance frequency of air column resonance noise in the tire air chamber, and one or more second Helmholtz resonators set to have a silencing characteristic for a second-order or higher-order resonance frequency of the air column resonance noise.
A method manufactures a vehicle wheel that includes a wheel rim having a cylindrical shape and a wheel disc provided on an inner peripheral side of the wheel rim. The method includes forming a workpiece of the vehicle wheel by casting or forging, the workpiece being a metal alloy workpiece; cutting a part of the workpiece to form a cut surface; coating, with a colored paint, the cut surface, an edge where the cut surface intersects a surface of the workpiece, and at least a portion around the edge in the surface of the workpiece; and chamfering the edge to form a bright surface where the workpiece is exposed, after coating the cut surface, the edge, and at least the portion around the edge.
A defective product determination method for a vehicle wheel includes: locating, as a locating step by a controller, a lowest point on a welding mark due to radiation of a laser beam within a target range from an inner peripheral surface of a wheel rim to a position spaced away by a specified distance inward in a radial direction of the vehicle wheel; and determining, as a determination step by the controller, that the vehicle wheel is a defective product when a defective product determination condition is satisfied. The defective product determination condition includes, as a necessary condition, a condition that a relative distance of the lowest point with respect to the inner peripheral surface of the wheel rim in the radial direction of the vehicle wheel is equal to or smaller than a reference distance.
G01N 21/952 - Inspection de la surface extérieure de corps cylindriques ou de fils
G01B 11/14 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la distance ou la marge entre des objets ou des ouvertures espacés
G01N 21/95 - Recherche de la présence de criques, de défauts ou de souillures caractérisée par le matériau ou la forme de l'objet à analyser
G01B 11/24 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer des contours ou des courbes
8.
VEHICULAR WHEEL AND METHOD FOR MANUFACTURING VEHICULAR WHEEL
The present invention invention improves the strength of the outer surface portion of a vehicular wheel. This vehicular wheel is made of a fiber-reinforced resin, and comprises a substantially cylindrical wheel rim and a wheel disc provided to the inner-peripheral side of the wheel rim. The outer surface of the wheel disc is provided with an outer surface layer formed from a first fiber-reinforced resin containing a thermoplastic resin and reinforcing fibers oriented such that a plurality of fiber bundles are regularly superimposed in different directions. A body portion, which is a portion other than the outer surface layer of the vehicular wheel, is formed from a second fiber-reinforced resin containing a thermoplastic resin and reinforcing fibers in which a plurality of fiber bundles are irregularly configured.
A vehicle wheel includes a hub portion, a rim portion, and a disc portion. The disc portion is arranged such that a window portion, a spoke portion, and a thin plate portion do not overlap when viewed from a wheel axis direction. The thin plate portion is connected to at least a part of the hub portion, the rim portion, and the spoke portion via a connection portion. A cross-sectional area of the connection portion that appears when the connection portion is cut in a wheel radial direction changes such that a cross-sectional area of an end of the connection portion becomes smaller than a cross-sectional area of another portion of the connection portion.
A vehicle wheel includes a hub portion attached to a vehicle, a substantially cylindrical rim portion, and a plurality of spoke portions connected to the rim portion and the hub portion. The plurality of the spoke portions have a window portion that penetrates in a wheel axial direction. An inclined surface is provided on a wheel back side of each of the spoke portions such that the inclined surface inclines toward a wheel front side from a center in a wheel circumferential direction toward the window portion. The inclined surface is provided at a portion including one end portion or both end portions in the wheel circumferential direction.
A manufacturing method for a wheel disc, includes forming a flange portion, wherein the flange portion is formed such that an inner mold and an outer mold having a cylindrical inner surface with a first inside radius larger than the first outside radius and placed above the inner mold coaxially to the inner mold are brought close relative to each other in an axial direction by one stroke so that the outer edge of the disc material is bent downward, and the cylindrical inner surface of the outer mold is provided with recessed portions hollowed outwardly in a wheel radial direction, the recessed portions being formed in ranges corresponding to the window portions in the wheel circumferential direction and in a range from a middle position to a bottom end in the wheel axial direction.
A system includes: a piping with a working gas encapsulated therein and a prime mover and load incorporated in the piping. The prime mover includes a prime mover-side heat accumulator and heat exchangers connected to opposite end portions of the heat accumulator. The load includes a load-side heat accumulator and heat exchangers connected to opposite end portions of the heat accumulator. The piping includes a looped piping portion having a looped shape and a branch piping portion branching from a branching point p in the looped piping portion, and the prime mover is incorporated in the branch piping portion and load is incorporated in the looped piping portion. A blocking film is inserted at a position in a vicinity of the branching point p. Consequently, a thermoacoustic temperature control system that enables enhancement in durability of a blocking film inserted in a part of a looped piping portion is provided.
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
F25B 9/14 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé caractérisés par le cycle utilisé, p. ex. cycle de Stirling
The present invention suppresses excessive stress from being exerted on a resin-made hub attachment part in a vehicular wheel. This vehicular wheel is provided with: a resin-made hub attachment part in which a bolt hole is formed; a surface-side member disposed on the wheel surface side of the bolt hole; and a reverse-surface side member disposed on the wheel reverse-surface side of the bolt hole. The surface-side member has: a first flange that has an outer diameter larger than the diameter of the bolt hole; and a first facing part that receives pressing force acting from a fastening member to the wheel reverse-surface side when fastened. The reverse-surface side member has: a second flange that has an outer diameter larger than the diameter of the bolt hole; and a second facing part that receives pressing force acting from a hub to the wheel surface side when fastened. The surface-side member and the reverse-surface side member are configured to abut each other in the axial direction of the wheel when fastened by the fastening member.
A holding device includes a pair of holding members positioned to be spaced apart from each other in a first direction, and a moving part that moves at least one of the pair of holding members to change a distance between the pair of holding members in the first direction. Each of the holding members is formed with a support face that supports the flange of the wheel, and an engaging portion that is located on an end portion side that is on an opposite side from the other holding member, and is able to engage with the flange of the wheel supported by the support face, from the radially outer side of the wheel. The installation space for a tire mounted on a wheel on the radially outer side of a flange of the wheel is prevented from varying due to the magnitude of the diameter of the wheel.
The fit between a wheel and a tire is improved. A tire assembly fitting device fits a bead portion of a tire of a tire assembly, including a wheel and the tire mounted on the wheel, to a bead seat portion of the wheel. The fitting device includes a support portion configured to support the tire assembly, and a pressing portion. The pressing portion is configured to press a first surface portion in a surface of at least one of sidewalls of the tire. The support portion is configured to support the tire assembly so that a second surface portion located in the surface of the sidewall on the opposite side of the rotation axis of the tire assembly from the first surface portion is displaceable in a direction away from the rim center plane of the wheel.
A manufacturing method for a vehicle wheel includes an overlap cutting step in which lathe machining is performed on a design portion of the vehicle wheel at feed speed that allows cutting marks to be connected with each other in a radial direction with a first cutting depth from a given reference position, and a non-overlap cutting step in which, after the overlap cutting step, lathe machining is performed on the design portion at feed speed that allows cutting marks to be separated from each other in the radial direction with a second cutting depth from the reference position, the second cutting depth being deeper than the first cutting depth.
B23B 5/28 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour tourner des roues ou des trains de roues ou leurs manivelles, c.-à-d. tours à roues
B23B 1/00 - Méthodes de tournage ou méthodes de travail impliquant l'utilisation de toursUtilisation d'équipements auxiliaires en relation avec ces méthodes
17.
Vehicle wheel disc and manufacturing method of vehicle wheel disc
A vehicle wheel disc includes a flat plate-shaped hub-mounted part, a cylindrical rim-mounted part, and a hat-shaped part. The hat-shaped part includes a hat top portion, a hat inner peripheral portion, and a hat outer peripheral portion. At a border between the hub-mounted part and the hat inner peripheral portion, a first connecting portion is provided, and at a border between the hat top portion and the hat outer peripheral portion, a second connecting portion is provided. The plate thickness of the hat outer peripheral portion is smaller than the plate thickness of an intermediate portion that is a portion from a border between the first connecting portion and the hat inner peripheral portion to a border between the hat top portion and the second connecting portion in the disc radial direction.
B21D 53/30 - Fabrication d'autres objets particuliers de roues ou de pièces similaires de jantes de roues
B21D 22/16 - Repoussage des pièces de révolution par rotation sur des mandrins ou gabarits de formage
B21H 1/04 - Fabrication d'articles en forme de solides de révolution de disquesFabrication d'articles en forme de solides de révolution de roues pleines avec bourrelet, p. ex. roues des chemins de fer
B60B 3/04 - Roues pleines, c.-à-d. roues avec corps en forme de disque supportant la charge à un seul disque ne faisant pas corps avec la jante
The objective of the present invention is to reduce variation in the arrangement space of a tire mounted on a wheel on the outer circumferential side of a flange of the wheel, said variation being caused by variation in the diameter of the wheel. The retaining device comprises: a pair of retaining members arranged apart from each other in a first direction; and a movement unit for moving at least one of the pair of retaining members so as to change the distance between the retaining members in the first direction. Each retaining member has formed thereon a support surface, which supports the flange of the wheel, and an engagement part, which is positioned on the side of an end part on the opposite side from the other retaining member, and which is capable of engaging, from the outer circumferential side of the wheel, the wheel flange supported on the support surface.
The purpose of the present invention is to improve the fit between a wheel and a tire. The fitting device for a tire assembly fits a bead portion of a tire of a tire assembly including a wheel and a tire assembled to the wheel into a bead seat portion of the wheel. The fitting device includes a support portion for supporting the tire assembly and a pressing portion. The pressing portion is configured to press a first surface portion of the surface of at least one sidewall of the tire. The support portion is configured to support the tire assembly so that a second surface portion of the surface of the sidewall opposite to the first surface portion with respect to the rotation axis of the tire assembly is capable of displacing in a direction of separation from the rim central surface of the wheel.
The objective of the present invention is to reduce variation in the arrangement space of a tire mounted on a wheel on the outer circumferential side of a flange of the wheel, said variation being caused by variation in the diameter of the wheel. The retaining device comprises: a pair of retaining members arranged apart from each other in a first direction; and a movement unit for moving at least one of the pair of retaining members so as to change the distance between the retaining members in the first direction. Each retaining member has formed thereon a support surface, which supports the flange of the wheel, and an engagement part, which is positioned on the side of an end part on the opposite side from the other retaining member, and which is capable of engaging, from the outer circumferential side of the wheel, the wheel flange supported on the support surface.
The purpose of the present invention is to improve the fit between a wheel and a tire. The fitting device for a tire assembly fits a bead portion of a tire of a tire assembly including a wheel and a tire assembled to the wheel into a bead seat portion of the wheel. The fitting device includes a support portion for supporting the tire assembly and a pressing portion. The pressing portion is configured to press a first surface portion of the surface of at least one sidewall of the tire. The support portion is configured to support the tire assembly so that a second surface portion of the surface of the sidewall opposite to the first surface portion with respect to the rotation axis of the tire assembly is capable of displacing in a direction of separation from the rim central surface of the wheel.
A thermoacoustic engine 110, which is incorporated in a thermoacoustic pipe 102 in which a working gas is sealed, comprises: a heat storage device 111 having a plurality of flow paths 111c penetrating in the longitudinal direction; a high-temperature-side heat exchanger 112 coupled to one end of the heat storage device; and a low-temperature-side heat exchanger 113 coupled to the other end of the heat storage device. The high-temperature-side heat exchanger comprises: a first section 112a connected to the one end of the heat storage device and in which a first opening 112a1 through which the working gas passes is formed; a second section 112b, which is interposed in a fluid passage 120 positioned on the outside of the thermoacoustic pipe and through which a fluid having a higher temperature than room temperature passes, and in which a second opening 112b1 through which the fluid passes is formed; and a connecting section 112c integrally connecting the first and second sections. The first opening is partitioned by a partition part 112a2. Thus, it is possible to provide a thermoacoustic engine equipped with a high-temperature-side heat exchanger having a simple configuration and a low manufacturing cost.
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
A manufacturing method for a wheel disc, includes forming a flange portion, wherein the flange portion is formed such that an inner mold and an outer mold having a cylindrical inner surface with a first inside radius larger than the first outside radius and placed above the inner mold coaxially to the inner mold are brought close relative to each other in an axial direction by one stroke so that the outer edge of the disc material is bent downward, and the cylindrical inner surface of the outer mold is provided with recessed portions hollowed outwardly in a wheel radial direction, the recessed portions being formed in ranges corresponding to the window portions in the wheel circumferential direction and in a range from a middle position to a bottom end in the wheel axial direction.
Disclosed are a thermoacoustic engine with high conversion efficiency from heat energy to acoustic energy and a designing method for the thermoacoustic engine. A stack of the thermoacoustic engine has a plurality of flow passages extending through a thermoacoustic piping section. A hot heat exchanger is coupled to one end in a longitudinal direction of the stack. A cold heat exchanger is coupled to the other end in the longitudinal direction of the stack. And a length in the longitudinal direction of the hot heat exchanger is greater than a length in the longitudinal direction of the stack, and is greater than a length in the longitudinal direction of the cold heat exchanger.
F03G 7/00 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
F03G 7/06 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs utilisant la dilatation ou la contraction des corps produites par le chauffage, le refroidissement, l'humidification, le séchage ou par des phénomènes similaires
This thermoacoustic temperature control system comprises a pipe (10) that is filled with a working gas, a motor (20), and a load (30). The motor (20) has a motor-side thermal accumulator (21) and motor-side heat exchangers (22, 23) connected to both ends of the thermal accumulator. The load (30) has a load-side thermal accumulator (31) and load-side heat exchangers (32, 33) connected to both ends of the thermal accumulator. The pipe (10) comprises a ring-shaped annular pipe section (11), and a branching pipe section (12) that branches from a branching point (p) on the annular pipe section (11). The motor (20) is incorporated in the branching pipe section (12), and the load (30) is incorporated in the annular pipe section (11). A blocking membrane (40) that prevents the working gas from passing through and that can vibrate in association with vibrations of the working gas is inserted in a position near the branching point (p) in the annular pipe section (11) between the low temperature side load-side heat exchanger (33) and the branching point (p). According to this configuration, the durability of the blocking membrane inserted in a portion of the annular pipe section can be improved.
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
This thermoacoustic temperature adjustment system 1 is provided with: a pipe 10 in which an operating gas is sealed; and a motor 20 and a load 30 that are incorporated in the pipe 10. The motor 20 has a motor-side heat storage device 21, and motor-side heat exchangers 22, 23 that are connected to both ends of the motor-side heat storage device 21. The load 30 has a load-side heat storage device 31, and load-side heat exchangers 32, 33 that are connected to both ends of the load-side heat storage device 31. The load 30 functions as a refrigerator or a heater for adjusting the temperature of an object. The outer diameter of the motor-side heat storage device 21 is larger than that of the load-side heat storage device 31. Accordingly, the total area size of a flow passage through which the operating gas passes in a cross-section of the motor-side heat storage device 21 is larger than the total area size of a flow passage through which the operating gas passes in a cross-section of the load-side heat storage device 31. Thus, a thermoacoustic temperature adjustment system that enables the load to be efficiently operated by using applied thermal energy can be provided.
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
A resin auxiliary air chamber member 30 is fixed between a pair of wall surfaces 13 by a metal fixing member 40, the pair of wall surfaces 13 being provided on the well portion 12 of a wheel rim. Each of the wall surfaces 13 is provided with a groove portion 15. The fixing member 40 comprises a top surface 41 and a pair of side surfaces 42 hanging from both ends in the width direction of the top surface 41. With the auxiliary air chamber member 30 placed on the bottom surface 12a of the well portion 12, the fixing member 40 is inserted between the pair of wall surfaces 13 so as to cover the auxiliary air chamber member 30 with the top surface 41 and the pair of side surfaces 42 of the fixing member 40. The outside surface of each of the side surfaces 42 is provided with a pawl portion 44 which abuts on the groove portion 15 and restricts the movement to the outside in the wheel radial direction of the fixing member 40 with respect to the wall surface 13. Thus, it is possible to provide an automobile wheel in which the dimensions of the auxiliary air chamber member in the wheel axial direction are small.
A thermoacoustic electric generator system includes: a thermoacoustic engine provided in an annular tube; a turbine provided in a branched tube and rotating when receiving acoustic energy, which is generated by thermoacoustic oscillation of working gas in the thermoacoustic engine; and a generator for converting kinetic energy, which is generated by rotation of the turbine, to electric energy. The turbine is provided at a specified position that belongs to a region between a first position and a second position in each region of the branched tube, the first position being an intermediate position between one end and the other end, and the second position being an intermediate position between the first position and the other end.
F01D 15/10 - Adaptations pour la commande des générateurs électriques ou combinaisons avec ceux-ci
H02K 7/18 - Association structurelle de génératrices électriques à des moteurs mécaniques d'entraînement, p. ex. à des turbines
F03B 13/00 - Adaptations des "machines" ou machines motrices pour une utilisation particulièreCombinaisons des "machines" ou machines motrices avec les appareils entraînés ou qu'ils entraînentCentrales électriques ou ensembles machine-appareil
F01D 1/04 - "Machines" ou machines motrices à déplacement non positif, p. ex. turbines à vapeur avec des moyens stationnaires de guidage de fluide de travail et un rotor à ailettes ou de structure analogue traversées par le fluide de travail principalement dans le sens axial
F03G 7/00 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs
F02G 1/04 - Ensembles fonctionnels de moteurs à gaz chauds à déplacement positif du type à cycle fermé
F02C 6/00 - Ensembles fonctionnels multiples de turbines à gazCombinaisons d'ensembles fonctionnels de turbines à gaz avec d'autres appareilsAdaptations d'ensembles fonctionnels de turbines à gaz à des applications particulières
A thermoacoustic electric generator system includes: a turbine including a turbine blade provided in an inside of a branched tube in a tube component and rotating by thermoacoustic oscillation of working gas in a thermoacoustic engine, and a turbine rotational shaft configured to be coupled to the turbine blade, penetrate a tube wall of the branched tube, and extend from the inside to an outside thereof; and a generator provided on the outside of the branched tube in the tube component, coupled to the turbine rotational shaft of the turbine, and converting rotational energy of the turbine blade to electric energy.
F25B 9/14 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé caractérisés par le cycle utilisé, p. ex. cycle de Stirling
F02G 1/043 - Ensembles fonctionnels de moteurs à gaz chauds à déplacement positif du type à cycle fermé le moteur étant actionné par dilatation et compression d'une masse de gaz de travail chauffée et refroidie dans une ou plusieurs chambres continuellement communicantes expansibles, p. ex. moteurs du type à cycle de Stirling
30.
THERMOACOUSTIC ENGINE, AND METHOD FOR DESIGNING THERMOACOUSTIC ENGINE
The present invention is designed so that the length Lh of a heater (112) = Ls × (Th/Ts) × (Ss/Sh), and the length Lc of a cooler (113) = Ls × (Tc/Ts) × (Ss/Sc), where Ts is the average temperature of a heat accumulator (111) during operation of a thermoacoustic engine (110), Th is the temperature of the heater (112) during operation, Tc is the temperature of the cooler (113) during operation, Ss is the sum of the flow-channel area at the cross-section of the heat accumulator (111), Sh is the sum of the internal space area on which a working gas is present at the cross-section of the heater (112), Sc is the sum of the internal space area on which the working gas is present at the cross-section of the cooler (113), and Ls is the length of the heat accumulator. The length Lh of the heater (112) is greater than the length Ls of the heat accumulator (111), and greater than the length Lc of the cooler (113). It is thereby possible to provide a thermoacoustic engine that is highly efficient in converting thermal energy to acoustic energy, and a method for designing said thermoacoustic engine.
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
F03G 7/00 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs
A resin auxiliary air chamber member 30 is fixed, by a metal fixing member 40, between a pair of wall surfaces 13 provided in a well section 12 of a wheel rim. A groove 15 is provided in each wall surface 13. The fixing member 40 comprises a floor surface section 41 and a pair of side surface sections 42. The fixing member 40 is attached to the auxiliary air chamber member 30 and the auxiliary air chamber member 30 having the fixing member 40 attached thereto is inserted between the pair of wall surfaces 13. A first hook section 45 is provided on the outside surface of each side surface section 42, said first hook section abutting the groove 15 and restricting travel by the fixing member 40 relative to the wall surface 13, towards the outside in the wheel radial direction. A second hook section 46 is provided on the inside surface of each side surface section 42, said second hook section abutting part of the auxiliary air chamber member 30 and restricting travel by the auxiliary air chamber member 30 relative to the fixing member 40, towards the outside in the wheel radial direction. As a result an automobile wheel can be provided whereby the auxiliary air chamber member can be easily attached to the well section.
This metal melting device is provided with a crucible 20 for storing molten metal therein, a stirring part 30 for stirring the molten metal in the crucible 20, and a heating part 40 for heating the crucible 20. The stirring part 30 includes a cylindrical member 32 disposed along the vertical direction in a center part of the crucible 20, a plate-shaped member 31 disposed along the horizontal direction and connected to a top end part of the cylindrical member 32, and swirling upward flow generating parts 33, M1 for generating a swirling upward flow in the molten metal in the cylindrical member 32. An annular gap Z is formed between an outer edge of the plate-shaped member 31 and an inner wall surface of the crucible 20. The inside of a single crucible 20 can be used as a temperature increase chamber and a melting chamber. Consequently, the device as a whole can be made more compact than a configuration in which a temperature increase chamber and a melting chamber are provided separately.
When forming flat surfaces h of a plurality of tubes 112b, firstly, a "heat accumulator-side end" of each tube 112b is subjected to "crushing machining," before the plurality of tubes 112b are assembled in a block 112a. Sections of the plurality of tubes 112b which have been subjected to the "crushing machining" are subsequently subjected to "electric discharge machining," while the plurality of tubes 112b which have been subjected to the "crushing machining" are in a state of having been assembled in the block 112a, to form the flat surfaces h of the plurality of tubes 112b all at once. The "electric discharge machining" is performed by causing a flat end surface of an electric discharge electrode of an electric discharge machining machine to approach the outer surfaces of the plurality of tubes 112b, while maintaining the flat end surface orthogonal to the tube longitudinal direction (the x-axis direction). Accordingly, a method for producing a thermoacoustic engine employing a heater which causes the flat surfaces formed at the heat accumulator-side end of each tube to come into contact with an end surface of a heat accumulator, can be provided, with which the flat surface of each tube is readily and reliably brought into contact (surface contact) with the end surface of the heat accumulator.
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
B23C 3/00 - Fraisage de pièces particulièresOpérations de fraisage spécialesMachines à cet effet
B23H 1/00 - Usinage par décharge électrique, c.-à-d. enlèvement de métal au moyen de séries de décharges électriques à cadence élevée entre une électrode et une pièce en présence d'un fluide diélectrique
B23H 9/00 - Usinage spécialement conçu pour le traitement d'objets métalliques particuliers ou pour obtenir des effets ou des résultats particuliers sur des objets métalliques
When the "heat accumulator opening ratio A" is defined as the ratio of the total area of a plurality of flow paths 111c to the whole area of a "heat accumulator end surface" of a heat accumulator 111, the "tube centre width a" is defined as the width of a central portion of the flat shape of each tube 112b in the extension direction, the "tube end width b" is defined as the width of a flat surface h of each tube 112b, the "tube pitch p" is defined as the interval between the plurality of tubes 112b which are arranged in parallel and separated from each other, the "end opening ratio B" is defined as the value of ((p-b)/p), the "centre opening ratio C" is defined as the value of ((p-a)/p), and the "overall opening ratio E" is defined as the value of (A×B), the centre opening ratio C is smaller than the heat accumulator opening ratio A, the tube centre width a is greater than the tube end width b, and the value of (C/E) is 94-111%. Accordingly, a thermoacoustic engine employing a heater which causes the flat surfaces formed at the heat accumulator-side end of each tube to come into contact with the heat accumulator end surface can be provided, which is capable of achieving even greater acoustic energy.
F25B 9/00 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé
F03G 7/00 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs
A manufacturing method for a wheel disc 100 having a flange portion 30. The flange portion 30 comprises: a plurality of base portions 31, the length of which in the wheel axial direction is a reference length and constant; and a plurality of window portions 32, the length of which in the wheel axial direction is shorter than the reference length. In a flange portion forming process included in this manufacturing method, with a disc material mounted on an inner mold D having a cylindrical outside surface DS with an outer radius r1, the inner mold D and an outer mold P, which has a cylindrical inside surface PS with an inner radius R1 greater than the outer radius r1, are brought axially relatively closer to each other in one stroke, and thus the outer edge of the disc material is bent downward to form the flange portion 30. Recessed portions K are formed in an area of the cylindrical inside surface PS of the outer mold P corresponding to the window portions 32 in the wheel circumferential direction, and in an area from a position partway in the wheel axial direction to the lower end.
A vortex chamber includes an outer circumference wall, a container, an annular shoal portion provided between the container and the outer circumference wall so as to encircle the outer circumference of the container, and a dam portion protruding upward from the upper surface of the outer circumference of the container so as to partition the container from the shoal portion. An undried nonferrous metal block is fed into the shoal portion, the block having such a size that is not completely submerged into the molten metal in the shoal portion. The fed nonferrous metal block is gradually melted to have a reduced volume of small pieces and particles of nonferrous metal, which are re-circulated in the shoal portion, flown over the dam portion, and dropped into the container, thereby forming a vortex in the container in which remaining small pieces and particles submerged into the molten metal are melted.
F27D 3/00 - ChargementDéchargementManutention des charges
C22B 7/00 - Mise en œuvre de matériaux autres que des minerais, p. ex. des rognures, pour produire des métaux non ferreux ou leurs composés
F27B 3/04 - Fours à sole, p. ex. fours à réverbérationFours à arc électrique du type à plusieurs solesFours à sole, p. ex. fours à réverbérationFours à arc électrique du type à plusieurs chambresCombinaisons de fours à soles
F27D 27/00 - Dispositifs agitateurs pour matériaux fondus
F27D 3/14 - Chargement ou déchargement d'un matériau liquide ou fondu
F27D 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
This wheel (100) further includes a second disc (30) in addition to a cylindrical rim (10) and a first disc (20). The first disc (20) includes a first hub part (21), a plurality of spoke parts (22), and a ring part (23) having an annular shape. The ring part (23) is joined to the rim (10). The second disc (30) includes a second hub part (31) and a plurality of spoke parts (32). The second hub part (31) is located on the outer side of a vehicle relative to the first hub part (21) so as to be coaxial with the first hub part (21). A wheel radial direction outer end (32b) of each of the second spoke parts (32) is joined to the rim (10) at a position between first spoke parts 22 adjacent to each other in a wheel circumferential direction. This makes it possible to increase the number of spoke parts of the wheel, as a whole, without increasing the number of spoke parts of each of the first and second discs (20, 30).
B60B 1/14 - Fixation des rais à la jante ou au moyeu
B60B 3/08 - Roues pleines, c.-à-d. roues avec corps en forme de disque supportant la charge avec un corps formé de plusieurs disques axialement espacés
B60B 3/10 - Roues pleines, c.-à-d. roues avec corps en forme de disque supportant la charge perforées pour simuler des roues à rayons
In a step of forming a fixing groove for a wheel disk (20), an inner circumferential end of a first hub hole peripheral portion (41) is squeezed by a protruding portion (D21) of a back die (D2) and a dent portion (D31) of a front die (D3). In this manner, a fixing groove (50) is formed in a back surface of the first hub hole peripheral portion (41). Along with this, an excess material is pushed into the dent portion (D31) so that a protrusion (51) is formed on a front surface of the first hub hole peripheral portion (41). Thus, without requiring a step of cutting the excess material, the fixing groove (50) can be formed in a back surface of a hub hole peripheral portion (30).
This thermoacoustic power generation system 100 is equipped with: a thermoacoustic engine 110 provided in a ring-shaped pipe 102; a turbine 140 that is provided in a branch pipe 103, and rotates upon receiving acoustic energy E produced by self-excited vibration of an operating gas in the thermoacoustic engine 110; and a power generator 150 for converting kinetic energy from the rotation of the turbine 140 into power. Of the regions of the branch pipe 103, the turbine 140 is provided in a prescribed location that belongs to a region between a first location P3 that is an intermediate location between one end 103a and the other end 103b, and a second location P4 that is an intermediate location between the first location P3 and the other end 103b. As a result, it is possible to provide a technology that is effective in definitively driving a power generator of the turbine-type in a thermoacoustic power generation system for generating power by using the self-excited vibration of an operating gas produced by a thermoacoustic engine.
F03G 7/00 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs
F01D 1/04 - "Machines" ou machines motrices à déplacement non positif, p. ex. turbines à vapeur avec des moyens stationnaires de guidage de fluide de travail et un rotor à ailettes ou de structure analogue traversées par le fluide de travail principalement dans le sens axial
F02C 6/00 - Ensembles fonctionnels multiples de turbines à gazCombinaisons d'ensembles fonctionnels de turbines à gaz avec d'autres appareilsAdaptations d'ensembles fonctionnels de turbines à gaz à des applications particulières
F02G 1/04 - Ensembles fonctionnels de moteurs à gaz chauds à déplacement positif du type à cycle fermé
This thermoacoustic power generation system is equipped with: a turbine 140 including a turbine blade 145 that rotates by self-excited vibration of an operating gas in a thermoacoustic engine, and is provided inside a branch pipe 103 of a pipe arrangement section, and also including a turbine-rotated shaft 144 connected to the turbine blade 145 and configured so as to extend from inside the pipe to outside the pipe by penetrating through the pipe wall of the branch pipe 103; and a power generator 150 that converts the rotational energy of the turbine blade 145 into power, is connected to the turbine-rotated shaft 144 of the turbine 140, and is provided outside the branch pipe 103 of the pipe arrangement section. As a result, it is possible to provide a technology that minimizes the cost required by a power generator for generating power and is effective in improving maintenance properties in a thermoacoustic power generation system for generating power by using the self-excited vibration of an operating gas produced by a thermoacoustic engine.
F03G 7/00 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs
F01D 1/04 - "Machines" ou machines motrices à déplacement non positif, p. ex. turbines à vapeur avec des moyens stationnaires de guidage de fluide de travail et un rotor à ailettes ou de structure analogue traversées par le fluide de travail principalement dans le sens axial
F02C 6/00 - Ensembles fonctionnels multiples de turbines à gazCombinaisons d'ensembles fonctionnels de turbines à gaz avec d'autres appareilsAdaptations d'ensembles fonctionnels de turbines à gaz à des applications particulières
F02G 1/04 - Ensembles fonctionnels de moteurs à gaz chauds à déplacement positif du type à cycle fermé
A furnace includes: a furnace body; a housing rotary body including a plurality of side walls, a plurality of housing chambers partitioned by the side walls and disposed circumferentially in multiple stages, each including multiple housing chambers, and a space disposed in the central portion of the housing rotary body to provide a donut shape in plan view; a rotary driving device for rotating the housing rotary body; a heating device for heating the air inside the furnace body; a first and a second partition wall which together partition the inside of the furnace body into the first and the second zone; a first flow passage communicating a blowout port of the fan with outer circumference sides of the housing chambers in the first zone; and a second flow passage communicating outer circumference sides of the housing chambers in the second zone with a suction port of the fan.
F27B 7/02 - Fours à tambours rotatifs, c.-à-d. horizontaux ou légèrement inclinés à plusieurs chambres ou plusieurs tambours
F27B 9/10 - Fours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité chauffés sans contact entre gaz de combustion et la chargeFours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité chauffés électriquement chauffés par air ou gaz chauds
F27B 9/16 - Fours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité caractérisés par le trajet de la charge pendant le traitementFours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité caractérisés par le procédé de déplacement de la charge pendant le traitement la charge se déplaçant sur un trajet circulaire ou courbe
C21D 9/00 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet
F27D 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
F27B 7/14 - Fours à tambours rotatifs, c.-à-d. horizontaux ou légèrement inclinés avec des moyens pour brasser ou déplacer la charge
F27B 7/20 - Parties constitutives, accessoires ou équipement spécialement adaptés aux fours à tambours rotatifs
A cap has a plurality of engaging portions elastically engageable with a wheel for holding a tire. The cap is configured to partly cover the wheel. Each of the plurality of engaging portions has a spring member formed of metal.
B60B 7/10 - Systèmes de fixation à cet effet comportant plusieurs clips élastiques espacés et montés séparément sur le chapeau, p. ex. rivés, soudés ou démontables rapidement
B60B 7/04 - Chapeaux de roue, couronnes ou dispositifs similaires pour orner, protéger ou cacher, entièrement ou en partie, le corps de la roue, la jante, le moyeu ou le flanc du pneumatique constitués de plusieurs parties principales
A bead guide includes a columnar portion having a cylindrical side surface, and a guide plate extending from a distal end of the columnar portion. Through rotation of the bead guide, an expansion bar rotation driving section selectively switches the bead guide between a first position at which the guide plate is retreated radially inwardly from an outer circumferential end of a wheel, and a second position at which at least a part of the guide plate protrudes radially outwardly from the outer circumferential end of the wheel. The bead guide is switched from the first position to the second position so that the guide plate is caused to enter below an upper bead.
B60C 25/138 - Machines pour monter et démonter les pneumatiques comportant un support de pneumatique ou un outil mobiles le long de l'axe de la roue avec un mouvement de rotation de l'outil ou du support de pneumatique
In an anchoring groove forming step for a wheel disc (20), the inner peripheral end of a first hub hole surrounding part (41) is crushed by a protruding part (D21) of a reverse side mold (D2) and a depressed part (D31) of an obverse side mold (D3). Thus, an anchoring groove (50) is formed in the reverse surface of the first hub hole surrounding part (41), thereby excess thickness is pressed into the depressed part (D31), and a protrusion (51) is formed in the obverse surface of the first hub hole surrounding part (41). Therefore, the anchoring groove (50) can be formed in the reverse surface of the hub hole surrounding part (30) without requiring a step for cutting the excess thickness.
In order to reduce the height of a furnace body without decreasing the number of storage chambers in the height direction and also allow for a lower fan capacity while the rotary hearth has a simple structure, this rotary heat treatment furnace comprises: a furnace body (31); a storage rotating body (32) which has a substantially donut-like shape in plan view, is disposed straddling a first zone (P) and a second zone (Q), and is supported rotatably, said donut-like shape being formed from multiple storage chambers (32a) of substantially equivalent sizes that are formed in the circumferential direction and in multiple levels, with a gap (32a) being formed in the center, each storage chamber (32a) being partitioned by side walls (32c) extending in the radial direction; a rotary driving device (33) for rotating the storage rotating body (32); a first partitioning wall (37) and a second partitioning wall (38) that separates the interior of the furnace body (31) into the first zone (P) and the second zone (Q); a first channel (35) that connects the outer circumferential side of a storage chamber (32a) located in the first zone (P) to an air outlet of a fan (34); and a second channel (36) that connects the outer circumferential side of a storage chamber (32a) located in the second zone (Q) to an air inlet of the fan (34).
F27B 9/10 - Fours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité chauffés sans contact entre gaz de combustion et la chargeFours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité chauffés électriquement chauffés par air ou gaz chauds
F27B 9/16 - Fours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité caractérisés par le trajet de la charge pendant le traitementFours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité caractérisés par le procédé de déplacement de la charge pendant le traitement la charge se déplaçant sur un trajet circulaire ou courbe
F27D 7/04 - Circulation d'une atmosphère par des moyens mécaniques
Each spoke portion (50) includes a center valley portion (51), and spoke projecting threads (52) formed on both sides of the center valley portion (51). Each of the spoke projecting threads (52) includes an inclined surface portion (54), which protrudes outward in a spoke widthwise direction from a top (53) and inclines downward to a wheel axially back side. The inclined surface portion (54) is formed so that a length thereof in a range of from the top (53) to an outer end of the inclined surface portion (54) in the spoke widthwise direction becomes larger toward a spoke distal end side, and that an average downward inclination angle thereof becomes smaller toward the spoke distal end side. With this configuration, it is possible to increase rigidity of the spoke portion with good balance while avoiding interference with a braking device.
[Problem] To melt even a block-like non-ferrous metal material containing an oil and water safely and with high efficiency. [Solution] A voltex chamber (33) is composed of: an outer peripheral wall (331); an almost inverted cone-shaped vessel (332); a ring-shaped shallow part (333) which is provided between the vessel (332) and the outer peripheral wall (331) so as to surround the outer periphery of the vessel (332); and a weir part (334) which is provided so as to raise up against the outer periphery of the upper surface of the vessel (332) and partitions between the vessel (332) and the shallow part (333). An undried block-like non-ferrous metal material (M) having such a size that the non-ferrous metal material (M) cannot be completely immersed in the shallow part (333) in which a melt (10) is to circulate is gradually dissolved in the shallow part (333) in such a manner that the volume of the melt (10) is reduced, and small pieces and a powder of the size-reduced non-ferrous metal are allowed to run over the weir part (334) and fall into the vessel (332) while circulating the small pieces or the powder in the shallow part (333) together with the melt (10), thereby immersing and dissolving the non-ferrous metal material (M) by the action of a voltex flow.
F27B 3/04 - Fours à sole, p. ex. fours à réverbérationFours à arc électrique du type à plusieurs solesFours à sole, p. ex. fours à réverbérationFours à arc électrique du type à plusieurs chambresCombinaisons de fours à soles
F27D 27/00 - Dispositifs agitateurs pour matériaux fondus
Each spoke portion includes spoke projecting threads on both sides thereof, and a reinforcing plate portion is formed so as to protrude from a side edge of each of the spoke projecting threads outward in a spoke widthwise direction. The reinforcing plate portion is formed continuously with an inter-spoke plate portion extended from a fitting portion of a disc flange portion to a wheel radially inner side, and forms an integral plate surface with the inter-spoke plate portion. With this configuration, it is possible to reduce imbalance of rigidity of the spoke portion in a radial direction, and to increase rigidity of an automobile wheel.
A bead guide (50) is provided with a columnar part (51) having a cylindrical side surface, and a guide plate (52) provided extending from the tip end of the columnar part (51). An expansion bar rotation driving section (41) causes the bead guide (50) to rotate, and selectively switches between a first position at which the guide plate (52) is retracted further inward in the radial direction from the outer circumferential end of a wheel (H) and a second position at which at least a portion of the guide plate (52) projects further outward in the radial direction than the outer circumferential end of the wheel. By switching the bead guide (50) from the first position to the second position, the guide plate (52) can be caused to enter beneath an upper bead (TBU).
A bead guide (50) is provided with a columnar part (51) having a cylindrical side surface, and a guide plate (52) provided extending from the tip end of the columnar part (51). An expansion bar rotation driving section (41) causes the bead guide (50) to rotate, and selectively switches between a first position at which the guide plate (52) is retracted further inward in the radial direction from the outer circumferential end of a wheel (H) and a second position at which at least a portion of the guide plate (52) projects further outward in the radial direction than the outer circumferential end of the wheel. By switching the bead guide (50) from the first position to the second position, the guide plate (52) can be caused to enter beneath an upper bead (TBU).
In the present invention, a spoke section (50) is provided with spoke protrusions (52) on both sides thereof, and a reinforcing plate section (53) is formed so as to protrude outwards from the edges of the spoke protrusions (52) in the widthwise direction of the spokes. The reinforcing plate section (53) is formed so as to be contiguous with an inter-spoke plate section (32) extending inwards in the radial direction of the wheel from a fitting section (31) on a disc flange section (30), and forms an integral plate surface with the inter-spoke plate section (32). As a result, it is possible to reduce imbalances in the rigidity of the spoke section (50)in the radial direction, and it is possible to increase the rigidity of an automobile wheel (1).
In the present invention, a spoke section (50) is provided with a central valley section (51) and a spoke protrusion (52) provided to both sides of the central valley section (51). The spoke protrusion (52) is provided with an inclined surface section (54) that is inclined downwards to the rear in the wheel axial direction while protruding outwards in the spoke widthwise direction from an apex section (53). The inclined surface section (54) is formed in such a manner that the length from the apex section (53) to the outside edge in the spoke widthwise direction increases moving towards the spoke tip side, and the downwards average inclination angle decreases towards the spoke tip side. As a result, it is possible to increase rigidity of the spoke section in a balanced manner while avoiding interference with a brake device.
An automobile wheel is provided with a spoke section and a disk flange section. The spoke section is provided with a central groove section and raised side section disposed on either side of the central groove section. The raised side sections are provided with a peak side section that protrudes to the front and a flange section that extends from the side edge of the peak side section to the back. Meanwhile, the disk flange section is provided with a connector section and front edge sections that curve radially inward from the front edge of the connector section. The front edge sections are depressed toward the back relative to the peak side section of the raised side section. This automobile wheel, by means of the synergy between the shape effects of the spoke section and the disk flange section, improves strength and rigidity for withstanding radial loads and bending/torsional loads.
Provided is an automobile wheel (1) in which openings (32) surrounded by a wheel rim (10) and a wheel disc (20) are formed, wherein the wheel disc (20) has ribs (40) formed along aperture edges (35) which form the periphery of the openings (32). The ribs (40) are formed in a corrugated plate shape by the following: a recessed part (41) that is linearly and thinly recessed along the aperture edges (35); and an outer projecting part (42) and an inner projecting part (43) that are positioned at both sides of the recessed part (41). By forming the ribs (40), it is possible to reduce restrictions due to interference with a brake device (Br), and increase the strength of the aperture edges (35).
A recess is formed on the periphery of each of through-holes that go through a rim cavity, and the outer surface of a rim part is cut while a seal member for sealing the through-hole is positioned on the recess. It is thereby possible to stably manufacture a vehicle wheel in which swarf tends not to remain inside the rim cavity. Furthermore, it is not necessary to avoid the seal member for sealing the through-hole when cutting the outer surface of the rim part, and the outer surface of the rim part can be cut without any distinction having to be made between the periphery of the through-hole and the rest of the outer surface. Any increase in manufacturing costs can be minimized.
A vehicle wheel according to the present invention includes a hollow-state hollow portion and a solid-state non-hollow portion inside an outboard bead seat in a radial direction, which are provided in series in a circumferential direction of the wheel, the non-hollow portion having a cross section with a larger area than a hole cross section of a valve hole and having the valve hole formed therein. This structure prevents a sealing structure for ensuring hermetic performance from being complicated as compared to a wheel having the valve hole in the hollow portion, thus simplifying a mounting structure of an air valve. A method for manufacturing such a vehicle wheel allows formation of the valve hole in the non-hollow portion. Machining dust generated through a cutting process can thus be prevented from entering the hollow portion and remaining therein.
B60B 3/02 - Roues pleines, c.-à-d. roues avec corps en forme de disque supportant la charge à un seul disque faisant corps avec la jante
B60B 21/02 - Jantes caractérisées par leur section transversale
B21K 1/38 - Fabrication d'éléments de machines de rouesFabrication d'éléments de machines de disques de jantesFabrication d'éléments de machines de rouesFabrication d'éléments de machines de disques de bandages
A hat portion of a wheel disk includes a hat inner inclined circumferential portion and a hat outer inclined circumferential portion. At least one of the hat inner inclined circumferential portion and the hat outer inclined circumferential portion includes: a plurality of curved protruding circumferential portions that protrude toward a surface side into a curved shape; and at least one curved recessed circumferential portion that is provided between the adjacent curved protruding circumferential portions and that is recessed toward a back side into a curved shape. The hat portion of this construction provides a significant effect in improving stiffness because of the shapes of the curved protruding circumferential portions and the curved recessed circumferential portion. Consequently, an automobile wheel has improved overall stiffness and strength. Therefore, a car on which the automobile wheel is mounted can provide increased driving stability.
a is formed between a ring-shaped wall portion and partition wall portions, the ring-shaped wall portion is bent toward a flange portion, and the ring-shaped wall portion and the flange portion are welded together. The sound absorbing spaces which communicate with each other via communication gaps defined according to the separation groove are thereby formed in the outer rim portion and/or the inner rim portion. In such a method, since the communication gaps can be stably formed, an increase in internal pressure caused by heat expansion of air in the sound absorbing spaces during a heat treatment step can be reduced, thus allowing prevention of molding defects due to the increase in the internal pressure.
A base coat coating composition which is able to suppress cracking of a metal thin film, even when a tough top coat layer capable of satisfactorily protecting the metal thin film is formed on the metal thin film, and even when a heat resistance test is performed, as well as a composite film and a method for producing the composite film. Specifically, a base coat coating composition used for undercoating a metal thin film formed on a metal substrate, and containing a coating film-forming component which contains at least 30% by mass of an epoxy (meth)acrylate having a cyclic structure and has an average molecular weight between crosslinks of 180 to 1,000, as well as a composite film having a base coat layer obtained from the base coat coating composition, and a method for producing the composite film.
C09D 4/00 - Compositions de revêtement, p. ex. peintures, vernis ou vernis-laques, à base de composés non macromoléculaires organiques ayant au moins une liaison non saturée carbone-carbone polymérisable
C09D 163/00 - Compositions de revêtement à base de résines époxyCompositions de revêtement à base de dérivés des résines époxy
C09D 163/10 - Résines époxy modifiées par des composés non saturés
C23C 14/16 - Matériau métallique, bore ou silicium sur des substrats métalliques, en bore ou en silicium
C08F 220/32 - Esters contenant de l'oxygène en plus de l'oxygène de la fonction carboxyle contenant des radicaux époxyde
C09D 133/06 - Homopolymères ou copolymères d'esters d'esters ne contenant que du carbone, de l'hydrogène et de l'oxygène, l'atome d'oxygène faisant uniquement partie du radical carboxyle
B05D 5/06 - Procédés pour appliquer des liquides ou d'autres matériaux fluides aux surfaces pour obtenir des effets, finis ou des structures de surface particuliers pour obtenir des effets multicolores ou d'autres effets optiques
B05D 7/00 - Procédés, autres que le flocage, spécialement adaptés pour appliquer des liquides ou d'autres matériaux fluides, à des surfaces particulières, ou pour appliquer des liquides ou d'autres matériaux fluides particuliers
A recess (26) is formed on the periphery of each of through-holes (25) that go through a rim cavity (21), and the outer surface of a rim part (3) is cut while a seal member (41) for sealing the through-holes (25) is positioned on the recess (26). It is thereby possible to stably manufacture a vehicle wheel (1) in which swarf tends not to remain inside the rim cavity (21). Furthermore, it is not necessary to avoid the seal member (41) for sealing the through-holes (25) when cutting the outer surface of the rim part (3), and the outer surface of the rim part (3) can be cut without any distinction having to be made between the periphery of each of the through-holes (25) and the rest of the outer surface. Any increase in manufacturing costs can be minimized.
An automobile wheel (1) is provided with a spoke section (24) and a disk flange section (25). The spoke section (24) is provided with a central groove section (31) and raised side sections (32) disposed on either side of the central groove section (31). The raised side sections (32) are provided with a peak side section (33) that protrudes to the front and a flange section (34) that extends from the side edge of the peak side section (33) to the back. Meanwhile, the disk flange section (25) is provided with a connector section (35) and front edge sections (36) that curve radially inward from the front edge of the connector section (35). The front edge sections (36) are depressed toward the back relative to the peak side section (33) of the raised side sections (32). This automobile wheel (1), by means of the synergy between the shape effects of the spoke section (24) and the disk flange section (25), improves strength and rigidity for withstanding radial loads and bending/torsional loads.
An automotive wheel includes a wheel disc in which a hat section is provided outside a hub mounting section. A hat inner inclined surrounding section of the hat section includes an inner convex surrounding section protruding to a surface side in a curved shape, and an inner lower concave surrounding section continuously formed with an inner peripheral edge of the inner convex surrounding section, continuously formed with an outer peripheral edge of a hub surface rounded section, and protruding to the back side in a curved shape.
A vehicle wheel (1) according to the present invention is provided with a hollow-shaped hollow portion and a solid-shaped non-hollow portion (22) inside a surface side bead sheet (12) in a radial direction, which are provided in series in a circumferential direction of the wheel, the non-hollow portion (22) having a cross section which has a larger area than a hole cross section of a valve hole (41) and having the valve hole (41) formed therein. With this structure, a sealing structure for ensuring hermetic performance is prevented from being complicated as compared to a wheel provided with the valve hole (41) in the hollow portion, and it is possible to simplify an equipment structure of an air valve (101). By a method for manufacturing the vehicle wheel (1) as described above, the valve hole (41) is formed in the non-hollow portion (22), so it is possible to suppress cuttings generated through a cutting process from entering the hollow portion and remaining therein.
A wheel (1) for an automobile is configured in such a manner that the wheel disc (3) comprises an outer peripheral ring section (29) having protrusions and recesses, the outer peripheral ring section (29) being formed by continuously and alternately forming circular arc-shaped contact sections (25) and contactless protrusion sections (22c) along the circumferential direction of the wheel, the circular arc-shaped contact sections (25) being in contact with and welded to the bent peripheral section (31) of the wheel rim (2), the contactless protrusion sections (22c) protruding further toward the front side than the circular arc-shaped contact sections (25) and separating from the bent peripheral section (11). Welded sections (35) at which the circular arc-shaped contact sections (25) and the bent peripheral sections (11) are welded together are intermittently arranged in the circumferential direction of the wheel. The configuration provides a large design surface to improve the freedom of design and improves the rigidity because of the shape effect of the outer peripheral ring section (29) having protrusions and recesses.
A hat section for a wheel disk has a structure comprising a plurality of curved convex circumferential sections and one or more curved concave circumferential sections. The plurality of curved convex circumferential sections protrude in a curved shape toward the front side, at an inner sloped circumferential section and/or an outer sloped circumferential section of the hat section, and the one or more curved concave circumferential sections are provided between adjacent curved convex circumferential sections and are concave in a curved shape toward the rear side. As a result of this structure, a large increase in rigidity is exhibited due to the shape of the plurality of the curved convex circumferential sections and curved concave circumferential sections, and in general the rigidity and strength of the wheel can be improved. It is therefore possible to increase the running stability of an automobile to which the wheel for an automobile has been fitted.
In an automobile wheel, a disc flange of a wheel disc includes bent surface-side edge portions each having an arcuate shape and arranged concentrically with each other, and the bent surface-side edge portions extend from the surface-side end edge of a fitted straight annular portion to be bent radially inward and are dented to a back side of the outer end portions of the lateral edge portions of spokes. The thus configured automobile wheel can exhibit high strength and rigidity against a radial load, a bending load, and a torsional load because of the shape of the bent surface-side edge portions, thereby suppressing deformation of the disc flange caused while an automobile is running. Thus, it is possible to mitigate a stress concentration on a joined portion between the wheel disc and a wheel rim.
Disclosed is a method of manufacturing a vehicle wheel (1) capable of preventing forming defects when forming an outer rim portion (8) and/or an inner rim portion wherein a sound damping airspace (25) is disposed, and of attaining an operating effect that minimizes, by way of the sound damping airspace (25), cavity resonances that arise in a tire interior airspace (102). After a separation groove (55), comprising a curved groove bottom surface (55a), is formed between a ring-shaped wall portion (53) and a partition portion (22), the ring-shaped wall portion (53) is bent toward a flange portion (10a) and the ring-shaped wall portion (53) is welded to the flange portion (10a), forming a sound damping airspace (25) in an outer rim portion (8) and/or an inner rim portion, which communicates via a connecting gap (61) that is defined on the basis of the separation groove (55). The method facilitates stable formation of the connecting gap (61), thereby allowing easing internal pressure increases caused when air within the sound damping airspace (25) thermally expands in the vulcanization step, as well as alleviating forming defects due to internal pressure increases.
Provided is a base coat coating composition wherein it is possible to form a strong top coat layer which can sufficiently protect a metal thin film on the metal thin film, and to prevent the metal thin film from cracking even when a heat resistance test is performed. Also provided are a composite film and a method for producing same. Disclosed is a base coat coating composition for undercoating a metal thin film formed on a metal base material, which contains a coating film-forming composition having an average molecular weight between crosslinks of 180 to 1000 and containing 30 mass% or more of an epoxy(meth)acrylate having a cyclic structure. Also disclosed are a composite film provided with a base coat layer obtained by means of said base coat coating composition, and a method for producing said composite film.
C09D 163/10 - Résines époxy modifiées par des composés non saturés
B05D 7/14 - Procédés, autres que le flocage, spécialement adaptés pour appliquer des liquides ou d'autres matériaux fluides, à des surfaces particulières, ou pour appliquer des liquides ou d'autres matériaux fluides particuliers à du métal, p. ex. à des carrosseries de voiture
B05D 7/24 - Procédés, autres que le flocage, spécialement adaptés pour appliquer des liquides ou d'autres matériaux fluides, à des surfaces particulières, ou pour appliquer des liquides ou d'autres matériaux fluides particuliers pour appliquer des liquides ou d'autres matériaux fluides particuliers
B32B 15/092 - Produits stratifiés composés essentiellement de métal comprenant un métal comme seul composant ou comme composant principal d'une couche adjacente à une autre couche d'une substance spécifique de résine synthétique comprenant des résines époxy
C09D 5/00 - Compositions de revêtement, p. ex. peintures, vernis ou vernis-laques, caractérisées par leur nature physique ou par les effets produitsApprêts en pâte
C09D 163/00 - Compositions de revêtement à base de résines époxyCompositions de revêtement à base de dérivés des résines époxy
A process for producing an aluminum wheel includes a cleaning step, in which the surface of the aluminum wheel is chemically etched with an alkali cleaning liquid which contains an alkali builder, an organic builder, and a chelating agent to such an extent that the Si atomic ratio of metal Si to oxide Si is from 0.01 to 9, and a shot blast treatment step can be omitted for cleaning the surface of the aluminum wheel.
Disclosed is a vehicle wheel wherein a disc flange part of a wheel disc is provided with concentric arc-shaped curving front edge sections that extend from the front edge of a joining straight ring and curve radially inwards towards the back side of the wheel relative to outer lateral sides of spoke parts. The shape of said curving front sections results in high strength and rigidity with respect to radial and torsional loads and can prevent the disc flange part from deforming during driving. This alleviates concentrated stress acting on the join between the wheel disc and a wheel rim.
This invention provides a fuel tank of a simple structure without any special device but having space of a predetermined ratio after the fuel tank has been filled with liquefied fuel. The fuel tank is of a form in which a number of cylindrical or spherical containers are arranged in parallel and are coupled together in a manner that the cylindrical or spherical containers neighboring each other share partitioning walls (8), respectively. Each of the partitioning walls has a passage through which the neighboring cylindrical or spherical containers are communicated with each other, and the upper ends of the passages are formed leaving partly the inner partitioning walls so that the liquid will not enter into the upper parts of the cylindrical or spherical containers.
B60K 15/077 - Réservoirs de carburant avec des moyens pour modifier ou commander la distribution ou les mouvements du carburant, p. ex. pour empêcher le bruit, les oscillations, l'éclaboussement ou le manque de carburant
Disclosed is an automobile wheel configured so that a well recess is formed at the area at the back side well wall of the well of the wheel rim that faces a valve hole, said well recess receding toward the back along a well bottom of the well. Through this configuration, the vibration that is generated by the centrifugal force of an air valve equipped with an air pressure detection device when the vehicle is moving can be suppressed due to the shape of the well recess, and stable driving of the automobile and comfortable riding are thus improved. The same effect is also demonstrated when an automobile wheel is configured so that a well recess is formed at the area at the front side well wall of the well where the valve hole is to be formed, said well recess receding toward the front along the well bottom of the well of the wheel rim so that the front side portion of the air pressure detection device of the air valve can be fit therein.
Provided is a liquefied gas fuel supply device that, even if an accelerator is operated suddenly, can accurately follow said operation and stably carry out an appropriate engine operation. If it is determined from a supply flow volume determination value that a flow volume in a fuel supply pipe and/or the engine is anomalous, a valve opening/closing control means closes off a narrow openable/closeable channel by actuating an actuated valve in an electromagnetic valve device interposed between a fuel supply pump and the fuel supply pipe, thereby switching a main valve to a closed position and forcibly shutting off supply of a liquefied gas fuel from the fuel supply pump in a fuel tank to the fuel supply pipe. Thus, even if an excessive pressure differential arises due to sudden accelerator operation, said accelerator operation can be reliably followed and an appropriate engine operation can be stably carried out.
F02M 21/08 - Appareils pour alimenter les moteurs en combustibles non liquides, p. ex. en combustibles gazeux stockés sous forme liquide pour combustibles non gazeux
F02M 21/02 - Appareils pour alimenter les moteurs en combustibles non liquides, p. ex. en combustibles gazeux stockés sous forme liquide en combustibles gazeux
F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
A wheel for an automobile having a wheel rim reduced in weight while suppressing the radial deformation of the rear opening edge of the wheel rim. An annular rib section formed stepwise on both the inner and outer sides thereof and smaller in thickness than the other portion of the ledge section of the wheel rim is circumferentially formed at the ledge section of the wheel rim. Consequently, the effect of suppressing the radial deformation of the rear opening edge of the wheel rim is enhanced by the shape effect of the annular rib section, and the effect of reducing the weight of the wheel rim can be provided by reducing the thickness of the annular rib section.
A wheel in which air chambers are appropriately shaped to reduce the weight of the wheel with the quietness when the tire rolls under a load maintained. A wheel (1) is provided with an annular space (5) located inside radially of a bead seat (4a) of a rim (3) so as to extend along the bead seat (4a). The space (5) is divided into air chambers (7) by partition walls (6). Each air chamber (7) has a communication section (8) for connecting the air chamber (7) and a space (10) located outside radially of the rim (3), and the air chamber (7) and the communication hole (8) form a Helmholtz resonator. The annular space (5) is composed of portions (11) having a large cross-sectional area and of portions (12) having a small cross-sectional area. The partition walls (6) are provided to the portions (12) having a small cross-sectional area.
An MMC cylinder liner 10 comprises an inner tubular portion 11 and an outer tubular portion 12. The inner tubular portion 11 includes a metal matrix composite formed of a compact impregnated with an Al-Si alloy wherein the compact is made of a reinforcing material. The outer tubular portion 12 is formed of the Al-Si alloy. The Si concentration of the Al-Si alloy impregnated into the compact of the inner tubular portion 11 is different from the Si concentration of the Al-Si alloy of the outer tubular portion 12. The MMC cylinder liner 10 satisfies both the mechanical characteristics required for a sliding surface of a piston and adhesiveness during casting. A method for producing the MMC cylinder liner 10 is also disclosed.
B22D 19/14 - Coulée dans, sur, ou autour d'objets formant partie intégrante du produit final les objets ayant la forme de filaments ou de particules
B22D 19/00 - Coulée dans, sur, ou autour d'objets formant partie intégrante du produit final
B22D 17/20 - AccessoiresCoulée sous pression ou moulage par injection, c.-à-d. moulage en introduisant le métal dans le moule sous haute pression Parties constitutives
B22D 17/10 - Machines à chambre froide, c.-à-d. dont la chambre de presse où on verse le métal liquide, n'est pas préchauffée avec mouvement horizontal de la presse
B22D 19/02 - Coulée dans, sur, ou autour d'objets formant partie intégrante du produit final pour fabriquer des pièces renforcées
B22D 19/16 - Coulée dans, sur, ou autour d'objets formant partie intégrante du produit final pour fabriquer des moulages composites à partir de métaux différents, p. ex. pour fabriquer des cylindres de laminoirs
C22C 47/08 - Fabrication d'alliages contenant des fibres ou des filaments métalliques ou non métalliques par mise en contact des fibres ou des filaments avec un métal fondu, p. ex. en imprégnant les fibres ou les filaments placés dans un moule
A wheel for an automobile, configured in such a manner that the rear flange section side of the wheel has improved strength and durability to provide the wheel with high strength and durability against an impact (load) acting on the wheel during the travel of the automobile. A wheel for an automobile, formed in such a manner that a tip peripheral section constituting a rear flange section of the rim has a radial width of not less than 8 mm but not greater than 15 mm. This makes the tip peripheral section, which is located at the extreme end of a rear opening end section of the rim, highly rigid, and as a result, deformation of the rear opening end section is highly effectively and efficiently suppressed. By this, stress occurring in the rear opening end section due to an impact from the tire is reduced and the strength and durability of the rear opening end section are enhanced.
An automobile wheel having a wheel di.sk with improved stiffness and increased strength and driving stability. An imaginary inward angled line is tangential to an inner circumferential surface of an inward recessed circumferential portion of a hat portion and tangential to an inner circumferential surface of a hub surface rounded portion of a hub mounting portion. An imaginary outward angled line is tangential to an inner circumferential surface of an outward recessed circumferential portion of the hat portion and runs through an intersection point of a disk flange and an imaginary bottom line. The imaginary bottom line extends along a back side surface of the hub mounting portion. The imaginary inward and outward angled lines satisfy a ratio of an imaginary outward angle to an imaginary inward angle of equal to or greater than 0.8 to equal to or smaller than 1.25 with respect to the imaginary bottom line.
An overfilling prevention device for a DME fuel tank, capable of operating accurately and stably so that a DME fuel tank is not filled with DME fuel to a level exceeding a maximum filling level of the DME fuel tank. A diaphragm type overfilling prevention device, configured in such a manner that a diaphragm provided on the rear side of a main outlet, from which a DME fuel flows into a DME fuel tank, and forming a variable closed region which is separated in a sealed manner from the main outlet side is formed by layering a synthetic rubber plate and a metallic plate on each other in the thickness direction of the diaphragm, with the metallic plate provided on the variable closed region side. The configuration enables the diaphragm to operate accurately and stably even if filling of the tank with the DME fuel and consumption of the DME fuel are repeatedly performed, and also enables both a function of filling the tank with the DME fuel and a function of preventing overfilling of the tank with the DME fuel to be stably performed for a relatively long period.
A process for production of an aluminum wheel, which makes it possible, even when non-chromate surface treatment is conducted after casting, to attain sufficient tight adhesion between an aluminum wheel and a non-chromate coating and sufficient corrosion resistance. A process for production of an aluminum wheel, characterized by comprising the cleaning step of etching the surface of an aluminum wheel chemically with an alkaline cleaning fluid containing an alkaline builder, an organic builder and a chelating agent until the atomic ratio of metallic Si to oxide Si on the surface of the aluminum wheel becomes 0.01 to 9. In cleaning the surface of an aluminum wheel, the process can dispense with shot blasting.
Provided is a method which prevents or reduces the contamination of a substrate surface, or makes the substrate surface hydrophilic to protect the substrate surface by the arrangement of a first layer including a negatively charged material and a second layer including a positively charged material, or a positively charged material and/or a negatively charged material successively on the substrate side either on the substrate surface or in the substrate surface layer. This novel method prevents or reduces the adhesion of contamination over time to the substrate, and prevents or reduces color fading or color changes of the substrate.
B32B 7/02 - Propriétés physiques, chimiques ou physicochimiques
B32B 9/00 - Produits stratifiés composés essentiellement d'une substance particulière non couverte par les groupes
B60B 3/00 - Roues pleines, c.-à-d. roues avec corps en forme de disque supportant la charge
B60B 7/00 - Chapeaux de roue, couronnes ou dispositifs similaires pour orner, protéger ou cacher, entièrement ou en partie, le corps de la roue, la jante, le moyeu ou le flanc du pneumatique
An object of the present invention is to obtain a vehicle wheel having a significant effect of preventing dirtying due to brake dust. A + (positively)-charged coating film in which the water contact angle is 35° or less and the product of saturated charging voltage (kV) x charge half life (sec) is 50 or less is formed on the surface of a vehicle wheel.
In disk (3a) of automobile wheel (1a), each of multiple hub surface round corner portions (20) provided at intervals on virtual circle (26) set around the center of hub hole (10) as a virtual center so as to surround the hub hole (10) is subjected to compression forming that induces work hardening, thereby imparting a compressive residual stress. Consequently, the strength of each of the hub surface round corner portions (20) is enhanced.
Disclosed is a metal composite material which can show high wear resistance and durability when used as a sliding material. Also disclosed is a process for producing the metal composite material. A metal composite material (10) is produced by conducting the pressure impregnation of a porous preform (1) containing a porous aluminum borate particle (3) with a molten product of a metal to thereby fill a micropore (3a) in the aluminum borate particle (3) with the metal. In the metal composite material (10), the metal matrix and the aluminum borate particle (3) are bound firmly to each other. Therefore, the metal composite material (10) has high strength and hardness. The metal composite material (10) can also show excellent wear resistance when used as a sliding material.
A metal composite material which can have a prolonged sliding life in which desired sliding properties can be maintained; and a process for producing the metal composite material. The metal composite material (10) is obtained through the casting of a melt (6) of a metal and has aluminum borate particles (3) remaining porous and exposed in the outer surface of the composite material. Due to this constitution, a grease infiltrates into the aluminum borate particles (3) in the outer surface, is held therein, and oozes out with sliding. Consequently, the sliding life in which desired sliding properties are maintained can be significantly prolonged. This metal composite (10) can be molded with a preform obtained by mixing a silica sol (4) and an alumina sol (5) in an aqueous solution to cover aluminum borate particles (3) with silica particles and alumina particles which have become electrically neutral and then sintering the covered aluminum borate particles.
A preform for composite materials which has high strength and excellent air permeability and is hence applicable to the high-speed die-casting method and from which a metallic composite material capable of having excellent mechanical properties can be formed by the high-speed die-casting method. Ceramic fibers (2) or/and ceramic particles (3, 5) are mixed with a silica sol (7) and calcium carbonate (4). The mixture is sintered at a given temperature. Thus, a preform (1) for composite materials is obtained which comprises: a calcium/silicon sinter (11) yielded from the silica sol (7) and calcium carbonate (4); and the ceramic fibers (2) or/and ceramic particles (3, 5) coated with the calcium/silicon sinter (11), the fibers (2) or/and particles (3, 5) being bonded to each other with the sinter (11). The preform (1) for composite materials has high strength and excellent air permeability and is applicable to the high-speed die-casting method capable of attaining high productivity.
C22C 47/06 - Prétraitement des fibres ou des filaments par façonnage des fibres ou des filaments en une structure préformée, p. ex. en utilisant un liant temporaire afin de former un élément analogue à un mat
B22D 18/02 - Coulée avec pression, utilisant des dispositifs presseurs mécaniques, p. ex. matriçage semi-liquide
B22D 19/00 - Coulée dans, sur, ou autour d'objets formant partie intégrante du produit final
B22D 19/14 - Coulée dans, sur, ou autour d'objets formant partie intégrante du produit final les objets ayant la forme de filaments ou de particules
C04B 35/80 - Fibres, filaments, "whiskers", paillettes ou analogues
C04B 38/00 - Mortiers, béton, pierre artificielle ou articles de céramiques poreuxLeur préparation
C22C 47/12 - Imprégnation ou coulée sous une pression mécanique
A process for producing a preform for composite materials which contains a solid lubricant almost evenly dispersed therein. It is useful for forming a metallic composite material capable of stably having desired sliding properties. Ceramic fibers (2), a solid lubricant (5) comprising carbon as the main ingredient, and sodium hydrogen phosphate (8) are mixed in water to produce an aqueous mixture solution (10). In the solution, sodium phosphate is adherent to the surface of the solid lubricant (5) to improve the wettability of the solid lubricant (5) by water. Consequently, in this aqueous mixture solution (10), the solid lubricant (5) is almost evenly dispersed. This aqueous mixture solution (10) is dehydrated and then sintered in a non-oxidizing atmosphere. Thus, a preform (1) for composite materials can be produced in which the solid lubricant (5) is almost evenly dispersed throughout the whole preform. This preform (1) for composite materials and a light metal are combined with each other to form a metallic composite material (12), which can sufficiently and stably exhibit desired sliding properties.
C22C 47/06 - Prétraitement des fibres ou des filaments par façonnage des fibres ou des filaments en une structure préformée, p. ex. en utilisant un liant temporaire afin de former un élément analogue à un mat
C22C 1/08 - Alliages poreux avec pores ouverts ou fermés
B22D 18/02 - Coulée avec pression, utilisant des dispositifs presseurs mécaniques, p. ex. matriçage semi-liquide
B22D 19/00 - Coulée dans, sur, ou autour d'objets formant partie intégrante du produit final
A method and a device (20) for machining a valve hole in a wheel rim for an automobile. The method comprises a step for forming a mounting seat surface (8) on the wheel rim (2) firmly held by a clamp means and a rim support means by holding an annular seat pressing punch (32) and a hole opening punch (34) inserted into the guide hole (33) of the seat pressing punch in a seat machining style and pressingly machining the wheel rim and a step for forming a valve hole (7) by temporarily separating the hole opening punch (34) from the seat pressing punch (32) and punching the wheel rim (2) with the hole opening punch (34). By these machining method and the machining device (20), the mounting seat surface (8) and the valve hole (7) can be accurately and stably formed, and burrs for which removal operation is required can be eliminated. By using these machining method and the machining device (20), production time and cost can be reduced.
A method of molding an uneven wall thickness tube capable of molding an uneven wall thickness tube having a partially thin-walled peripheral part from a cylindrical raw tube with approximately uneven wall thickness, a method of manufacturing a wheel rim for a vehicle molded from the uneven wall thickness tube, and an uneven wall thickness tube molding device. In the method of molding the uneven wall thickness tube, the uneven wall thickness tube (X) having the thin-walled peripheral part (Y) of a prescribed width is molded by loosely fitting a plurality of pressing rolls (20a) to (20f) having pressing projected parts (22a) to (22f) increased in width stepwise formed on all the periphery thereof to a mandrel roll (2) in the order of increasing in width and pressing the pressing projected parts (22a) to (22f) against the rotating cylindrical raw tube (x) to form thin-walled peripheral parts (y1) to (y6) stepwise. The method of manufacturing the wheel rim comprises a step for molding the uneven wall thickness tube (X). The device (1) materializes the molding method. Thus, the wheel rim with uneven wall thickness can be manufactured while the productivity of normal wheel rims is maintained.
