Patents by Inventor Yasuharu Ogawa
Yasuharu Ogawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11925968Abstract: A method for manufacturing a press-formed article (100) includes a first step for forming a base sheet portion, a first rising portion, and a first strip portion from a sheet-shaped workpiece having a first edge portion and a second edge portion; and a second step for forming a second rising portion by causing a strip-shaped first zone including the second edge portion to be disposed between a first upper die and a first lower die from both sides, causing a second zone adjacent to the first zone to be disposed between a second upper die and a second lower die from both sides, and moving the first upper die and the first lower die relative to the second upper die and the second lower die, wherein, in the second step, a part of the second rising portion which is connected to a vertical ridge line (108) is shear-deformed.Type: GrantFiled: September 23, 2020Date of Patent: March 12, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Ryo Kuroda, Yasuharu Tanaka, Takashi Miyagi, Misao Ogawa
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Publication number: 20230345588Abstract: An induction heating device is provided. The induction heating device comprises a plurality of induction heating devices disposed at intervals along the circumference of a ring-shaped workpiece, a setting unit for setting induction heating conditions, and a switching control unit. Each of the plurality of induction heating devices comprises heating coils disposed facing areas to be heated of the workpiece, a plurality of transformers connected to the heating coils in parallel, a plurality of matching units connected to any one of the plurality of transformers, an inverter unit having a rectifier unit and an inverter unit, an inverter control unit having a rectification control unit, and a group of switches.Type: ApplicationFiled: June 19, 2023Publication date: October 26, 2023Applicant: NETUREN CO., LTD.Inventors: Hitoshi Nakatsu, Masato Yoshioka, Yoshimasa Tanaka, Tsutomu Ito, Kenji Koyanagi, Masaki Sagae, Tatsuya Ishii, Yoshitaka Misaka, Yasuharu Ogawa
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Patent number: 11729868Abstract: An induction heating device is provided. The induction heating device comprises a plurality of induction heating devices disposed at intervals along the circumference of a ring-shaped workpiece, a setting unit for setting induction heating conditions, and a switching control unit. Each of the plurality of induction heating devices comprises heating coils disposed facing areas to be heated of the workpiece, a plurality of transformers connected to the heating coils in parallel, a plurality of matching units connected to any one of the plurality of transformers, an inverter unit having a rectifier unit and an inverter unit, an inverter control unit having a rectification control unit, and a group of switches.Type: GrantFiled: December 28, 2020Date of Patent: August 15, 2023Assignee: NETUREN CO., LTD.Inventors: Hitoshi Nakatsu, Masato Yoshioka, Yoshimasa Tanaka, Tsutomu Ito, Kenji Koyanagi, Masaki Sagae, Tatsuya Ishii, Yoshitaka Misaka, Yasuharu Ogawa
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Publication number: 20210120637Abstract: An induction heating device is provided. The induction heating device comprises a plurality of induction heating devices disposed at intervals along the circumference of a ring-shaped workpiece, a setting unit for setting induction heating conditions, and a switching control unit. Each of the plurality of induction heating devices comprises heating coils disposed facing areas to be heated of the workpiece, a plurality of transformers connected to the heating coils in parallel, a plurality of matching units connected to any one of the plurality of transformers, an inverter unit having a rectifier unit and an inverter unit, an inverter control unit having a rectification control unit, and a group of switches.Type: ApplicationFiled: December 28, 2020Publication date: April 22, 2021Applicant: NETUREN CO., LTD.Inventors: Hitoshi Nakatsu, Masato Yoshioka, Yoshimasa Tanaka, Tsutomu Ito, Kenji Koyanagi, Masaki Sagae, Tatsuya Ishii, Yoshitaka Misaka, Yasuharu Ogawa
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Patent number: 10952288Abstract: An induction heating device and an induction heating method are provided. The entire areas to be heated of the workpiece can be uniformly heated to a predetermined high temperature, and uniform heating is possible even when the workpiece deforms in a non-uniform manner during heating. When areas to be heated are established on a workpiece so as to extend in one direction and the areas to be heated are induction-heated, the deformation amount on one edge of the areas to be heated is different from that on the other. This induction heating device includes; heating coils facing a portion of the areas to be heated when the workpiece is induction-heated; and a relative transfer means for transferring the workpiece and the heating coils along one direction in a relative manner, and the heating coils are disposed so as to correspond to the areas to be heated during the heating period.Type: GrantFiled: July 17, 2018Date of Patent: March 16, 2021Assignee: NETUREN CO., LTD.Inventors: Hitoshi Nakatsu, Masato Yoshioka, Yoshimasa Tanaka, Tsutomu Ito, Kenji Koyanagi, Masaki Sagae, Tatsuya Ishii, Yoshitaka Misaka, Yasuharu Ogawa
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Patent number: 10912159Abstract: An induction heating device and an induction heating method are provided. The entire areas to be heated of the workpiece can be uniformly heated to a predetermined high temperature, and uniform heating is possible even when the workpiece deforms in a non-uniform manner during heating. When areas to be heated are established on a workpiece so as to extend in one direction and the areas to be heated are induction-heated, the deformation amount on one edge of the areas to be heated is different from that on the other. This induction heating device includes; heating coils facing a portion of the areas to be heated when the workpiece is induction-heated; and a relative transfer means for transferring the workpiece and the heating coils along one direction in a relative manner, and the heating coils are disposed so as to correspond to the areas to be heated during the heating period.Type: GrantFiled: July 17, 2018Date of Patent: February 2, 2021Assignee: NETUREN CO., LTD.Inventors: Hitoshi Nakatsu, Masato Yoshioka, Yoshimasa Tanaka, Tsutomu Ito, Kenji Koyanagi, Masaki Sagae, Tatsuya Ishii, Yoshitaka Misaka, Yasuharu Ogawa
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Patent number: 10582575Abstract: A heating coil includes a pair of linear lead portions adapted to be connected to a power supply, and a ring-shaped or coil-shaped head portion having end portions connected to the lead portions respectively. A flow path through which a cooling medium flows is formed inside the lead portions and the head portion. An outer circumferential surface of the head portion has a circular or elliptical cross section and is configured to face a heating target portion of an inner circumferential surface of a work extending, the heating target portion extending in a circumferential direction of the work. Each of the lead portions has a straight side portion in a plane intersecting a longitudinal direction of the lead portions, the straight side portions of the lead portions being arranged in proximity to each other.Type: GrantFiled: December 5, 2012Date of Patent: March 3, 2020Assignee: NETUREN CO., LTD.Inventors: Yutaka Kiyosawa, Yutaka Sugiyama, Yasuharu Ogawa
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Patent number: 10462854Abstract: Heating coils are opposed to a portion of an annular workpiece having a continuously provided recessed surface, and the heating coils and the annular workpiece are moved relative to each other to heat the recessed surface by induction heating. The heating apparatus includes a first heating coil having a first corner conductor portion to be opposed to a first corner portion of the recessed surface and a first bottom conductor portion connected to the first corner conductor portion to be opposed to the bottom portion, and a second heating coil having a second corner conductor portion to be opposed to a second corner portion of the recessed surface and a second bottom conductor portion connected to the second corner conductor portion to be opposed to the bottom portion.Type: GrantFiled: April 8, 2015Date of Patent: October 29, 2019Assignee: NETUREN CO., LTD.Inventors: Yutaka Kiyosawa, Shigeo Takahashi, Yasuharu Ogawa
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Publication number: 20180332672Abstract: An induction heating device and an induction heating method are provided. The entire areas to be heated of the workpiece can be uniformly heated to a predetermined high temperature, and uniform heating is possible even when the workpiece deforms in a non-uniform manner during heating. When areas to be heated are established on a workpiece so as to extend in one direction and the areas to be heated are induction-heated, the deformation amount on one edge of the areas to be heated is different from that on the other. This induction heating device includes; heating coils facing a portion of the areas to be heated when the workpiece is induction-heated; and a relative transfer means for transferring the workpiece and the heating coils along one direction in a relative manner, and the heating coils are disposed so as to correspond to the areas to be heated during the heating period.Type: ApplicationFiled: July 17, 2018Publication date: November 15, 2018Applicant: NETUREN CO., LTD.Inventors: Hitoshi Nakatsu, Masato Yoshioka, Yoshimasa Tanaka, Tsutomu Ito, Kenji Koyanagi, Masaki Sagae, Tatsuya Ishii, Yoshitaka Misaka, Yasuharu Ogawa
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Patent number: 10057945Abstract: An induction heating device and an induction heating method are provided. The entire areas to be heated of the workpiece can be uniformly heated to a predetermined high temperature, and uniform heating is possible even when the workpiece deforms in a non-uniform manner during heating. When areas to be heated are established on a workpiece so as to extend in one direction and the areas to be heated are induction-heated, the deformation amount on one edge of the areas to be heated is different from that on the other. This induction heating device includes: heating coils facing a portion of the areas to be heated when the workpiece is induction-heated; and a relative transfer means for transferring the workpiece and the heating coils along one direction in a relative manner, and the heating coils are disposed so as to correspond to the areas to be heated during the heating period.Type: GrantFiled: April 6, 2012Date of Patent: August 21, 2018Assignee: NETUREN CO., LTD.Inventors: Hitoshi Nakatsu, Masato Yoshioka, Yoshimasa Tanaka, Tsutomu Ito, Kenji Koyanagi, Masaki Sagae, Tatsuya Ishii, Yoshitaka Misaka, Yasuharu Ogawa
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Publication number: 20170041988Abstract: Heating coils are opposed to a portion of an annular workpiece having a continuously provided recessed surface, and the heating coils and the annular workpiece are moved relative to each other to heat the recessed surface by induction heating. The heating apparatus includes a first heating coil having a first corner conductor portion to be opposed to a first corner portion of the recessed surface and a first bottom conductor portion connected to the first corner conductor portion to be opposed to the bottom portion, and a second heating coil having a second corner conductor portion to be opposed to a second corner portion of the recessed surface and a second bottom conductor portion connected to the second corner conductor portion to be opposed to the bottom portion.Type: ApplicationFiled: April 8, 2015Publication date: February 9, 2017Inventors: Yutaka KIYOSAWA, Shigeo TAKAHASHI, Yasuharu OGAWA
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Publication number: 20140144904Abstract: An induction heating device and an induction heating method are provided. The entire areas to be heated of the workpiece, even a large workpiece, can be readily and approximately uniformly heated to a predetermined high temperature, and uniform heating is possible even when the workpiece deforms in a non-uniform manner during heating. When areas to be heated H1, H2 are established on a workpiece W so as to extend in one direction and the areas to be heated H1, H2 are induction-heated, the deformation amount on one edge of the areas to be heated H1, H2 is different from that on the other. This induction heating device includes: heating coils 451 facing a portion of the areas to be heated H1, H2 when the workpiece W is induction-heated; and a relative transfer means for transferring the workpiece W and the heating coils 451 along one direction in a relative manner, and the heating coils 451 are disposed so as to correspond to the areas to be heated H1, H2 during the heating period.Type: ApplicationFiled: April 6, 2012Publication date: May 29, 2014Applicant: NETUREN CO., LTD.Inventors: Hitoshi Nakatsu, Masato Yoshioka, Yoshimasa Tanaka, Tsutomu Ito, Kenji Koyanagi, Masaki Sagae, Tatsuya Ishii, Yoshitaka Misaka, Yasuharu Ogawa
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Patent number: 6024913Abstract: In the apparatus: Y table 43 carries a work W and travels a predetermined distance in direction Y in a reciprocating manner; X table 41 causes the work W to reciprocate in direction X between a first position, in which the work W is loaded onto and unloaded from Y table 43, and a fourth position, in which an induction heating coil 23 is disposed; X table 41 is mounted on a base frame 11; a first reference on Y table 43 positions rows of quenched portions 76a of the work W in desired locations when the work W is loaded onto Y table 43; a second reference on Y table 43 serves as a reference for determining coordinates of Y table 43; a position measuring means 32 in a second position intermediate between the first and the third position measures coordinates of the second reference and of the quenched portions 76a; and, a control means 100 issues signals to control X-Y table 40 together with the heating coil 23 based on the measured coordinates.Type: GrantFiled: February 3, 1998Date of Patent: February 15, 2000Assignee: Neturen Co., Ltd.Inventors: Yasuharu Ogawa, Daiji Itoh, Yoshimasa Tanaka, Hisashi Tabuchi