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    Manufacturing apparatus and manufacturing method for laminated iron core
    3.
    发明授权
    Manufacturing apparatus and manufacturing method for laminated iron core 有权

    公开(公告)号：US11990802B2

    公开(公告)日：2024-05-21

    申请号：US16966526

    申请日：2018-03-21

    Applicant: Kuroda Precision Industries Ltd.

    Inventor： Hironobu Okudaira ,  Hideo Horii ,  Kenichi Shindo

    IPC: H02K15/02 ,  B21D28/02 ,  H01F41/02 ,  B32B38/00

    CPC classification number: H02K15/02 ,  B21D28/02 ,  H01F41/0233 ,  B32B38/0004

    Abstract: To prevent an adhesive agent from adhering to a die set for outer shape punching and avoid contamination of the die set by the adhesive agent even if the adhesive agent protrudes from the outer shape contour of a laminated iron core, a laminated iron core manufacturing device includes: a first punch (32) and a first die (48) for punching a part of an outer shape of each iron core lamina in a sheet steel strip; an adhesive agent applying apparatus (60) configured to apply an adhesive agent on an adhesive agent application region including a portion defined in the sheet steel strip by punching by the first punch (32) and the first die 48; and a second punch (34) and a second die (50) configured to punch the outer shape of each iron core lamina other than the part punched by the first punch (32) and the first die (48) from the sheet steel strip.

    Progressive die machine and method for manufacturing laminated iron cores by using same
    5.
    发明授权
    Progressive die machine and method for manufacturing laminated iron cores by using same 有权

    公开(公告)号：US11065665B2

    公开(公告)日：2021-07-20

    申请号：US15537134

    申请日：2015-12-17

    Applicant: KURODA PRECISION INDUSTRIES LTD.

    Inventor： Hideo Horii ,  Kenichi Shindo ,  Shinichi Sakanishi

    IPC: B21D28/16 ,  H02K15/02 ,  B21D28/02 ,  B21D28/10 ,  B21D45/06 ,  B21D28/04 ,  B21D28/14

    Abstract: When provisionally blanking a lamination sheet by using a punch for provisional blanking and a counter punch, the displacement of pilot holes located around the lamination sheet is minimized. The progressive die machine (1) comprises a pilot hole punch (72), a punch (9) for provisionally punching an iron core laminate (2) from a strip (W) formed with pilot holes (P), a counter punch (31) provided in a lower die assembly (5) and configured to push the iron core laminate (2) against the punch (9), a stripper plate (13) for separating the strip (W) from the provisional blanking punch after a provisional punching, a punch (10) for completely separating the iron core laminate from the strip. At least a part of the stripper plate (13) associated with the provisionally blanking is not in contact with the strip, and at least a part of an outer peripheral part of the provisionally blanked lamination sheet is formed with a connecting portion (79) connected to the strip.

    Device, Method, and Jig for Manufacturing Magnet Embedded Core
    6.
    发明申请
    Device, Method, and Jig for Manufacturing Magnet Embedded Core 审中-公开

    公开(公告)号：US20200099278A1

    公开(公告)日：2020-03-26

    申请号：US16092294

    申请日：2017-04-10

    Applicant: Kuroda Precision Industries Ltd.

    Inventor： Osamu Fukuyama ,  Tomoaki Murayama ,  Tetsuy Nishizawa ,  Masanobu Ikeda ,  Kazuo Nakamura

    IPC: H02K15/03

    Abstract: To prevent creation of unnecessary resin when fixing a magnet with resin, a manufacturing method for manufacturing a magnet embedded core comprises: a placing step of placing the rotor core on a mounting table such that an end surface of the rotor core is in contact with the mounting table; a resin charging step of charging the resin in solid state into the magnet insertion hole; a melting step of inciting the resin in the magnet insertion hole; a magnet inserting step of inserting the magnet into the magnet insertion hole; a closure step of closing the opening of the magnet insertion hole remote from the mounting table; and a resin pressurizing step of pressurizing the molten resin that has flowed into a buffer chamber formed in the mounting table from the opening of the magnet insertion hole on a side of the mounting table following the closure step.

    Apparatus and method for manufacturing laminated iron core
    7.
    发明授权
    Apparatus and method for manufacturing laminated iron core 有权

    公开(公告)号：US10201844B2

    公开(公告)日：2019-02-12

    申请号：US15509978

    申请日：2014-11-07

    Applicant: KURODA PRECISION INDUSTRIES LTD.

    Inventor： Koichi Nishinaka

    IPC: B21D28/14 ,  B05D1/26 ,  B05C5/02 ,  B05C11/10 ,  H01F27/245 ,  H02K15/02 ,  B05D7/24 ,  H01F41/02

    Abstract: In manufacturing a laminated iron core by laminating and bonding iron core laminates blanked from a sheet steel strip into a prescribed profile, the adhesive agent can be applied to the iron core laminates in a stable manner without regard to the arrangement and the number of the application spots on each iron core laminate. The metallic die machine (1) is provided with an adhesive agent application unit (12) configured to apply an adhesive agent to a prescribed area of the sheet steel strip (W) corresponding to the iron core laminates (2), and the adhesive agent application unit is provided with a casing (44) defining a plurality of adhesive agent storage chambers (55-57) for storing the adhesive agent before the adhesive agent is applied to the prescribed area. The casing is provided with a plurality of ejection orifices (H1 to H3) each communicating with a corresponding one of the adhesive agent storage chambers and configured to eject the adhesive agent.

    PROGRESSIVE DIE MACHINE AND METHOD FOR MANUFACTURING LAMINATED IRON CORES BY USING SAME
    9.
    发明申请
    PROGRESSIVE DIE MACHINE AND METHOD FOR MANUFACTURING LAMINATED IRON CORES BY USING SAME 审中-公开

    公开(公告)号：US20170361369A1

    公开(公告)日：2017-12-21

    申请号：US15537134

    申请日：2015-12-17

    Applicant: KURODA PRECISION INDUSTRIES LTD.

    Inventor： Hideo HORII ,  Kenichi SHINDO ,  Shinichi SAKANISHI

    IPC: B21D28/16 ,  B21D28/04 ,  H02K15/02 ,  B21D28/14

    CPC classification number: B21D28/16 ,  B21D28/02 ,  B21D28/04 ,  B21D28/10 ,  B21D28/14 ,  B21D45/06 ,  H02K15/02

    Abstract: When provisionally blanking a lamination sheet by using a punch for provisional blanking and a counter punch, the displacement of pilot holes located around the lamination sheet is minimized. The progressive die machine (1) comprises a pilot hole punch (72), a punch (9) for provisionally punching an iron core laminate (2) from a strip (W) formed with pilot holes (P), a counter punch (31) provided in a lower die assembly (5) and configured to push the iron core laminate (2) against the punch (9), a stripper plate (13) for separating the strip (W) from the provisional blanking punch after a provisional punching, a punch (10) for completely separating the iron core laminate from the strip. At least a part of the stripper plate (13) associated with the provisionally blanking is not in contact with the strip, and at least a part of an outer peripheral part of the provisionally blanked lamination sheet is formed with a connecting portion (79) connected to the strip.

    Back Pressure Device for Progressive Die Apparatus and Progressive Die Apparatus Provided Therewith
    10.
    发明申请
    Back Pressure Device for Progressive Die Apparatus and Progressive Die Apparatus Provided Therewith 审中-公开
    用于逐行模具设备的背压装置和随之提供的逐行模具装置

    公开(公告)号：US20170072448A1

    公开(公告)日：2017-03-16

    申请号：US15123306

    申请日：2014-03-04

    Applicant: KURODA PRECISION INDUSTRIES LTD.

    Inventor： Hideo HORII ,  Kenichi SHINDO

    IPC: B21D28/14 ,  B21C51/00 ,  B21D22/20

    CPC classification number: B21D28/14 ,  B21C51/00 ,  B21D22/20 ,  B21D28/145 ,  H02K7/06

    Abstract: In a back pressure device for progressive die apparatus, a suitable back pressure can be produced during the blanking interval preventing the iron core laminates from being pushed upward by using a simple structure. The back pressure device for progressive die apparatus comprises a support table (31) disposed in a vertically moveable manner in an iron core retaining member (22) for retaining iron core laminates blanked from the sheet steel strip in the progressive die apparatus (1) and for stacking the iron core laminates thereon one after another, a support unit (32) for supporting the support table, a lifting motor (33) for causing a vertical movement of the support table via the support unit and a control unit (34) for controlling a rotational motion of the lifting motor, wherein the control unit is configured to set a plurality of torque limit values for limiting an output torque of the lifting motor depending on an action of the progressive die apparatus so that the output torque is limited by a largest of the torque limit values during a blanking interval for the iron core laminates.

    Abstract translation: 在用于渐进式模具设备的背压装置中，在冲切间隔期间可以产生合适的背压，从而通过简单的结构防止铁芯层压板向上推。 用于渐进式模具设备的背压装置包括一个支撑台（31），该支撑台（31）以可垂直移动的方式设置在铁芯保持构件（22）中，用于保持在渐进式模具装置（1）中从钢板条上冲切的铁芯叠片， 用于一个接一个地堆叠铁芯层压板，一个用于支撑支撑台的支撑单元（32），用于使得支撑台经由支撑单元垂直运动的提升马达（33）和用于 控制提升电机的旋转运动，其中控制单元被配置为根据逐行模具装置的动作来设定用于限制提升电动机的输出转矩的多个转矩限制值，使得输出转矩受到 在铁芯层压板的消隐间隔期间最大的扭矩极限值。

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