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公开(公告)号：US12246389B2
公开(公告)日：2025-03-11
申请号：US18439323
申请日：2024-02-12
Applicant: Neturen Co., Ltd.
Inventor： Takuya Suzuki , Masahiro Tsukahara , Osamu Idohara , Setsuo Takaki
IPC: B23K20/00 , B23K20/02 , B23K20/22 , B23K103/04
Abstract: A method for manufacturing a steel joined body having a plurality of steels joined together, the method comprising: disposing a carbonaceous material on at least one joining surface of steels to be joined together; overlapping joining surfaces of the steels to be joined together having the carbonaceous material interposed between the joining surfaces; and heating the steels having the joining surfaces overlapped at a maximum temperature of 1150° C. or higher and 1500° C. or lower, the carbonaceous material being disposed to generate a liquid phase on the joining surfaces at the maximum temperature, the carbon concentration in a joint interface after high frequency induction heating was adjusted to 0.20 mass % or higher and 2.10 mass % or lower by controlling a heating and holding time at the maximum temperature.
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公开(公告)号：US12245347B2
公开(公告)日：2025-03-04
申请号：US17393558
申请日：2021-08-04
Applicant: NETUREN CO., LTD.
Inventor： Tetsuya Ono , Masato Sugimoto , Yutaka Kiyosawa , Toshihiro Aiba , Kazutomi Oka , Kunihiro Kobayashi , Fumiaki Ikuta , Kazuhiro Kawasaki
Abstract: An induction heating system includes induction heating apparatuses, each including a high-frequency current transformer, a low-frequency current transformer and a heating coil, a high-frequency input switch connected to the high-frequency current transformer, a low-frequency input switch connected to the low-frequency current transformer, a first power source to output a high-frequency electric power and a low frequency electric power, a second power source, a first power source output switch connectable to the first power source, a second power source output switch connectable to the second power source, and a switch controller. Each induction heating apparatus includes a heater controller to send a signal to the switching controller to turn on one of the first power source output switch and the second power source output switch, to turn off the other, and to switch on or off each of the high-frequency input switch and the low-frequency input switch.
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公开(公告)号：US12011775B2
公开(公告)日：2024-06-18
申请号：US17903168
申请日：2022-09-06
Applicant: Neturen Co., Ltd.
Inventor： Takuya Suzuki , Masahiro Tsukahara , Osamu Idohara , Setsuo Takaki
IPC: B23K20/00 , B23K20/02 , B23K20/22 , B23K103/04
CPC classification number: B23K20/026 , B23K20/00 , B23K20/22 , B23K2103/04
Abstract: A steel joined body includes a plurality of steels joined together, the plurality of steels including a joint interface having a carbon concentration of 0.20 mass % or more and 2.10 mass % or less, and the steel joined body including a concentration gradient layer having a carbon concentration decreasing with distance from the joint interface.
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4.发明公开公开(公告)号：US20230345588A1
公开(公告)日：2023-10-26
申请号：US18211332
申请日：2023-06-19
Applicant: NETUREN CO., LTD.
Inventor： Hitoshi Nakatsu , Masato Yoshioka , Yoshimasa Tanaka , Tsutomu Ito , Kenji Koyanagi , Masaki Sagae , Tatsuya Ishii , Yoshitaka Misaka , Yasuharu Ogawa
Abstract: 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.
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公开(公告)号：US20230241690A1
公开(公告)日：2023-08-03
申请号：US17954003
申请日：2022-09-27
Applicant: Neturen Co., Ltd.
Inventor： Ryosuke Suzuki , Norimasa Sunaga , Daiki Sakamoto
Abstract: A machining apparatus includes: a support mechanism that supports a workpiece; a cutting mechanism that cuts the workpiece that has been supported by the support mechanism; and a heat treatment mechanism that performs heat treatment on the workpiece that has been supported by the support mechanism. The heat treatment mechanism includes a coil that performs induction heating on the workpiece. The coil and the workpiece that has been supported by the support mechanism are movable relative to each other.
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Patent Agency Ranking
公开(公告)号：USD953986S1
公开(公告)日：2022-06-07
申请号：US29770184
申请日：2021-02-10
Applicant: Neturen Co., Ltd.
Designer： Hiroki Inoue , Takashi Horino
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公开(公告)号：US11291086B2
公开(公告)日：2022-03-29
申请号：US15323520
申请日：2015-07-09
Applicant: NETUREN CO., LTD.
Inventor： Hidehiro Yasutake , Yoshimasa Tanaka
Abstract: A heating apparatus and a heating method are provided. The heating apparatus includes a coil configured to receive AC power to form a magnetic field that inductively heats a workpiece, a spray unit configured to spray cooling fluid including a liquid to the coil in a form of mist at least during a period in which the AC power is supplied to the coil. Alternatively, the spray unit may be configured to spray the cooling fluid in the form of mist to a heating target portion of the workpiece placed in the magnetic field at least during the period in which the AC power is supplied to the coil.
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公开(公告)号：US11247263B2
公开(公告)日：2022-02-15
申请号：US16477615
申请日：2018-03-14
Applicant: NETUREN CO., LTD.
Inventor： Akihiro Goto
Abstract: A method for manufacturing a rack bar having a first rack and a second rack is provided. The first and second racks have an angular positional difference around an axis of the rack bar. The method includes forming a first flat surface and a second flat surface on an outer circumference of a single hollow shaft member, with the angular positional difference being provided between the first and second flat surfaces, and forming the first rack on the first flat surface and the second rack on the second rack surface by press-fitting one or more mandrels into the hollow shaft member in a state in which one or more teeth dies corresponding to the first rack and the second rack is pressed against the first flat surface and the second flat surface.
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公开(公告)号：US20210197243A1
公开(公告)日：2021-07-01
申请号：US17130967
申请日：2020-12-22
Applicant: Neturen Co., Ltd.
Inventor： Toshifumi UEMOTO
Abstract: A rotary body including a drum and a wire support member winds a wire by rotation. A spacer is provided on the rotary body and is displaceable to a first position and a second position in the rotary body. When the spacer is in the first position, the wire is wound on the rotary body not via the spacer, and hence the wire is wound with the first diameter. When the spacer is in the second position, position, the wire is wound on the rotary body via the spacer, and hence the wire is wound with a second diameter larger than the first diameter.
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公开(公告)号：US20200343806A1
公开(公告)日：2020-10-29
申请号：US16767933
申请日：2018-09-18
Applicant: NETUREN CO., LTD.
Inventor： Takahiko KANAI
Abstract: A load abnormality detecting circuit for an inverter to detect abnormality of a load during an operation of the inverter which has a switching element and a phase synchronizing loop controlling an output frequency to be a resonance frequency of the load, the load abnormality detecting circuit includes a phase shift detection part that detects a phase shift between an output voltage and an output current which are applied from the inverter to the load and sends an abnormal load signal based on the detected phase shift. The switching element including a self-arc-extinguishing element and a reflux diode connected in reversely parallel to the self-arc-extinguishing element. The phase shift detection part detects advance and delay of a phase of the output current with respect to the output voltage.
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