Patents Assigned to Sumitomo Electric Sintered Alloy, Ltd.
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Patent number: 12103038Abstract: A crosslinked fluororesin-coated rotor manufacturing method is a method for manufacturing an annular outer rotor of an internal gear pump including the outer rotor, and an inner rotor, a side surfaces of the outer rotor being coated with a crosslinked fluororesin, an inner peripheral surface of the outer rotor not being coated with the crosslinked fluororesin, the method including: using an outer masking jig for covering the inner peripheral surface in a state where the side surfaces of the outer rotor are exposed; coating the outer rotor with an uncrosslinked fluororesin in a state where the outer masking jig is mounted to the outer rotor; and then irradiating the fluororesin with radiation in a state where the outer masking jig is removed from the outer rotor, to crosslink the fluororesin.Type: GrantFiled: December 24, 2019Date of Patent: October 1, 2024Assignees: SUMITOMO ELECTRIC SINTERED ALLOY, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Shoichi Takada, Masato Uozumi, Makoto Nakabayashi, Eiichi Kobayashi, Kazuaki Ikeda
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Patent number: 12085160Abstract: [Means for Solution] A gear member includes a tooth having a tooth flank whose profile is an involute curve, wherein in a cross-section of the tooth perpendicular to a face width direction, the tooth has a depression, near a top land, hollowed in the tooth flank relative to the involute curve.Type: GrantFiled: September 25, 2020Date of Patent: September 10, 2024Assignees: SUMITOMO ELECTRIC SINTERED ALLOY, LTD., HONDA MOTOR CO., LTD.Inventors: Reiko Okuno, Shinichi Hirono, Toshiyuki Kosuge, Heisuke Kobayashi, Shinya Kurihara, Katsuhiko Yazama
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Publication number: 20240231305Abstract: A machining system includes, a tool configured to machine a workpiece, a motor configured to rotate the tool or the workpiece, a controller configured to control the motor, a measurement device configured to acquire a load current of the motor, the controller is configured to change a rotational speed of the motor when a Mahalanobis distance exceeds a threshold, the Mahalanobis distance is a value determined by using a parameter based on the load current acquired by the measurement device in a specific machining range of the workpiece, and the parameter based on the load current includes a parameter obtained by performing Fourier transform on the load current and a measured value of the load current.Type: ApplicationFiled: March 3, 2022Publication date: July 11, 2024Applicant: Sumitomo Electric Sintered Alloy, Ltd.Inventors: Masaki UNTEN, Hiroaki TERAI, Senichi SUMI
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Publication number: 20240235283Abstract: A stator core configured to have a plurality of teeth each including a peripheral surface and a first end surface, wherein each of the plurality of teeth is formed of a dust core, the dust core includes a plurality of coated particles, and each of the plurality of coated particles includes a metallic particle and an electrically insulating coating, and wherein each of the first end surfaces has first regions formed of cross sections of the metallic particles and second regions formed of the electrically insulating coatings between the first regions, each of the peripheral surfaces is made of an oxide containing a constituent element of the soft magnetic material, an average thickness of the oxide in each of the peripheral surfaces is 10 ?m or less, and a difference between a maximum value and a minimum value of a first heights is 0.02 mm or less.Type: ApplicationFiled: April 15, 2022Publication date: July 11, 2024Applicants: Sumitomo Electric Industries, Ltd., Sumitomo Electric Sintered Alloy, Ltd.Inventors: Tatsuya SAITO, Tomoyuki UENO
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Patent number: 12030124Abstract: In a sizing device equipped with a turntable having a plurality of accommodation holes that accommodate workpieces, carrying the workpiece in each of the accommodation holes to a through hole of a die disposed at a workpiece shaping position one by one, and causing the workpiece to be pressed by upper and lower punches, while each of the accommodation holes is moved from a workpiece supply position to a workpiece taking-out position by the turntable being rotated about a rotation axis, the sizing device includes a plurality of identification information holding units, a supply-side input unit, a shaping position read unit, a punch control unit, and a shaping position input unit.Type: GrantFiled: September 8, 2020Date of Patent: July 9, 2024Assignee: SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Shinji Hayashi, Kenji Takeuchi
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Patent number: 12021412Abstract: A core piece that is circularly arranged to construct a stator core of an axial gap type rotary electric machine includes: a first member in a column form extending in an axial direction of the stator core; a second member in a plate form disposed on a first end side of the axial direction in the first member; and a third member in a plate form disposed on a second end side of the axial direction in the first member, the first member has a peripheral surface connecting with the second member and the third member, the second member has a protruding portion projecting outwardly from the peripheral surface of the first member, the third member has a protruding portion projecting outwardly from the peripheral surface of the first member, and the first member, the second member, and the third member are configured by an integrally molded green compact.Type: GrantFiled: December 27, 2022Date of Patent: June 25, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Tomoyuki Ueno
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Patent number: 11996731Abstract: A core used in an axial-gap rotating electric device includes an annular back yoke and a plurality of teeth protruding in an axial direction that is perpendicular to a first flat surface of the back yoke. The plurality of teeth are provided on the first flat surface at intervals in a circumferential direction. The back yoke and the teeth are constituted of an integrally-molded powder compact. A first curved section that connects a peripheral surface of each tooth and the first flat surface of the back yoke is provided at a corner between the tooth and the back yoke. The first curved section has a curvature radius ranging between 0.2 mm and 1.5 mm inclusive.Type: GrantFiled: September 5, 2019Date of Patent: May 28, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Tomoyuki Ueno, Hijiri Tsuruta, Yuichi Nakamura, Yuka Fukunaga
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Patent number: 11989006Abstract: A processing system comprises a tool that processes a workpiece composed of a metal member, a motor that rotates the workpiece or the tool, a control unit that controls the motor, and a measurement unit that obtains an electrical quantity of the motor, wherein the control unit changes a rotational speed of the motor based on a difference between a first electrical quantity and a second electrical quantity, the first electrical quantity is an electrical quantity obtained by the measurement unit while the motor rotates before the workpiece is processed, and the second electrical quantity is an electrical quantity obtained by the measurement unit while the workpiece is processed.Type: GrantFiled: August 31, 2020Date of Patent: May 21, 2024Assignee: SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventor: Kazuo Maeda
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Publication number: 20240157478Abstract: A high-speed steel sintered body includes, a base, a solidified layer continuously disposed on a surface of the base. The base is constituted by high-speed steel, the solidified layer is constituted by high-speed steel whose composition is different from a composition of the high-speed steel constituting the base, and a boundary between the base and the solidified layer is not visually identified in a 200× magnified observation image of a section intersecting the surface.Type: ApplicationFiled: December 23, 2021Publication date: May 16, 2024Applicant: Sumitomo Electric Sintered Alloy, Ltd.Inventors: Takanori OOTAKI, Hiroaki MOTOYAMA
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Publication number: 20240134338Abstract: A machining system includes, a tool configured to machine a workpiece, a motor configured to rotate the tool or the workpiece, a controller configured to control the motor, a measurement device configured to acquire a load current of the motor, the controller is configured to change a rotational speed of the motor when a Mahalanobis distance exceeds a threshold, the Mahalanobis distance is a value determined by using a parameter based on the load current acquired by the measurement device in a specific machining range of the workpiece, and the parameter based on the load current includes a parameter obtained by performing Fourier transform on the load current and a measured value of the load current.Type: ApplicationFiled: March 3, 2022Publication date: April 25, 2024Applicant: Sumitomo Electric Sintered Alloy, Ltd.Inventors: Masaki UNTEN, Hiroaki TERAI, Senichi SUMI
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Patent number: 11919081Abstract: A method of making a sintered part includes a step of applying a machining process to a compacted part with a tool to make a machined compacted part having a cogwheel shape, and a step of sintering the machined compacted part to make a sintered part, wherein the machining process is such that a surface of the compacted part on a side where the tool exits is supported by a plate member having a tooth pattern with same specifications as a tooth pattern of the cogwheel shape, and the tool is used to machine portions of the compacted part corresponding to tooth spaces of the plate member.Type: GrantFiled: February 21, 2020Date of Patent: March 5, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Kazunari Shimauchi, Tomoyuki Ueno, Tomoyuki Ishimine
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Patent number: 11923726Abstract: This stator core is a stator core for a rotating electric machine of an axial gap type and includes a body portion formed by a compaction-molded body of soft magnetic powder whose surfaces are coated with insulating films, wherein the body portion is provided with one or a plurality of through holes.Type: GrantFiled: September 5, 2019Date of Patent: March 5, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Yuuichi Nakamura, Tomoyuki Ueno, Tatsuya Saito
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Patent number: 11901773Abstract: This axial gap motor includes: a stator; and a rotor provided so as to be opposed to the stator in an axial direction. The rotor includes an annular rotor yoke, and a plurality of magnets provided to contact one surface of the rotor yoke so as to be arranged at predetermined intervals along a circumferential direction with magnetic poles thereof being different alternately. The one surface includes a plurality of facing areas facing and contacting the plurality of magnets, and a non-facing area not facing the plurality of magnets. The non-facing area includes partial areas each located between a pair of the facing areas adjacent to each other in the circumferential direction among the plurality of facing areas. The partial areas are formed to be recesses recessed in the axial direction relative to the facing areas.Type: GrantFiled: September 5, 2019Date of Patent: February 13, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Yuuichi Nakamura, Tomoyuki Ueno, Tatsuya Saito
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Patent number: 11888347Abstract: A core for use in an axial-gap rotary electric machine is annular and includes a plurality of core pieces into which the core is divided in a circumferential direction. Each core piece includes a yoke portion and a tooth portion that is formed integrally with the yoke portion and that projects from the yoke portion in an axial direction. Each yoke portion includes a plurality of protrusions provided on one side surface connected to the yoke portion of an adjacent one of the core pieces, and a plurality of recesses provided on other side surface connected to the yoke portion of another adjacent one of the core pieces, the recesses corresponding to the protrusions. An interval between the protrusions is 80% or less of a length of the one side surface of the yoke portion, the length being a direct distance between inner and outer peripheries of the yoke portion.Type: GrantFiled: October 17, 2019Date of Patent: January 30, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Tomoyuki Ueno
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Patent number: 11888351Abstract: A core that is used in an axial-gap rotary electric machine and that includes a body, and frame-shaped flange portions. The body includes an annular yoke and columnar teeth that are arranged in a circumferential direction of the yoke. The flange portions are fixed to end portions of the respective teeth. The yoke and the teeth are composed of a single powder compact. Each of the flange portions is composed of a powder compact that has a through-hole. The end portion of each of the teeth is inserted in the through-hole, and an end surface of each of the teeth is exposed from the through-hole. A ratio of an area of the end surface of each of the teeth to an area within an outer circumferential edge of each of the flange portions is 7.5% or more in a plan view in an axial direction of the yoke.Type: GrantFiled: September 5, 2019Date of Patent: January 30, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Yuichi Nakamura, Tomoyuki Ueno
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Patent number: 11869691Abstract: A powder magnetic core includes a compact including soft magnetic powder, and an insulating-resin coating that covers a portion of a surface of the compact. A ratio of an area of the insulating-resin coating to a surface area of the compact is lower than or equal to 85%, and a maximum depth of unevenness on a surface of the insulating-resin coating is smaller than or equal to 20 ?m.Type: GrantFiled: July 23, 2018Date of Patent: January 9, 2024Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Asako Watanabe, Tomoyuki Ueno
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Patent number: 11802617Abstract: A method of manufacturing a sintered gear includes preparing a green compact having two gear-shaped end surfaces, one on each of two sides in an axial direction of the green compact, and having a plurality of teeth on an outer peripheral surface formed between the two end surfaces; chamfering an edge of the teeth by a brush; and sintering the green compact. The brush is a wheel-type brush including a disk-shaped wheel and a bristle member radially protruding from an outer periphery of the wheel. The chamfering includes disposing the brush with respect to the green compact such that the axial direction of the green compact and an axial direction of the wheel intersect with each other; bringing a tip of the bristle member into contact with a tooth bottom edge; and relatively moving the brush in a circumferential direction of the green compact while rotating the brush.Type: GrantFiled: September 29, 2021Date of Patent: October 31, 2023Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Kazunari Shimauchi, Tomoyuki Ueno, Tomoyuki Ishimine
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Patent number: 11794244Abstract: A method for manufacturing a dust core, including: a step of preparing a raw material powder including a coated pure iron powder composed of a plurality of pure iron particles each having an insulating coating layer, a coated iron alloy powder composed of a plurality of iron alloy particles each having an insulating coating layer, and a metal soap; a step of manufacturing a molded article by performing a compression molding of the raw material powder filled in a mold; and a step of performing a heat treatment of the molded article to eliminate distortions in the coated pure iron powder and the coated iron alloy powder, wherein a difference Tm?Td between a melting point Tm of the metal soap and a temperature Td of the mold in the step of manufacturing the molded article is greater than or equal to 90° C.Type: GrantFiled: August 10, 2018Date of Patent: October 24, 2023Assignees: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Tatsuya Saito, Asako Watanabe, Tomoyuki Ueno, Hijiri Tsuruta
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Patent number: 11791672Abstract: A core for use in an axial gap rotating electric machine, the core including: a yoke having an annular plate shape; and a plurality of teeth having a columnar shape arranged at intervals in a circumferential direction of the yoke, wherein the yoke has: an outer-circumferential face; an inner-circumferential face; a first face having a flat shape connecting the outer-circumferential face and the inner-circumferential face to each other; and a plurality of recessed portions connected to the first face, each of the plurality of teeth has an outer-circumferential face protruding in an axial direction of the yoke with respect to the first face, each of the plurality of recessed portions are connected to at least a portion of each one of the plurality of teeth in a circumferential direction of the outer-circumferential face, all shortest distances between at least one of an outer-circumferential edge of the first face and an inner-circumferential edge of the first face and the outer-circumferential faces of the pluType: GrantFiled: December 13, 2019Date of Patent: October 17, 2023Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., Sumitomo Electric Sintered Alloy, Ltd.Inventors: Tatsuya Saito, Tomoyuki Ueno, Yuka Fukunaga, Hijiri Tsuruta, Shinichi Hirono
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Patent number: 11780005Abstract: Provided is a sizing apparatus including: a die set including a die plate that holds a die provided with a through hole to which a workpiece is to be supplied, and upper and lower punches that are to be inserted into the through hole to press the workpiece; a press main body that includes punch driving mechanisms that actuate the punches and in which the die set is configured to be attached to and detached from a predetermined position; and a turntable that is rotated on the die plate and supplies a workpiece to the die and discharges a workpiece from the die. The die set includes the turntable, and a supporting base on which the turntable is placed. The supporting base includes an axis positioning portion that is provided coaxially with a central axis of the turntable and positions the central axis at a predetermined position of the supporting base.Type: GrantFiled: September 23, 2022Date of Patent: October 10, 2023Assignee: SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Shinji Hayashi, Kenji Takeuchi