公开(公告)号：US09647518B2

公开(公告)日：2017-05-09

申请号：US14741924

申请日：2015-06-17

申请人： MITSUI HIGH-TEC , INC. ,  PANASONIC CORPORATION

发明人： Akihiro Hashimoto ,  Tadashi Iida ,  Kiyomi Kawamura ,  Koichi Mitamura

IPC分类号： H02K15/02 ,  B21D28/10 ,  H02K15/03 ,  B65H35/00 ,  B21D28/26 ,  B21D28/24 ,  B21D28/22

CPC分类号： H02K15/03 ,  B21D28/10 ,  B21D28/22 ,  B21D28/246 ,  B21D28/26 ,  B65H35/0006 ,  B65H35/008 ,  H02K15/02 ,  H02K15/024 ,  Y10T156/1002 ,  Y10T156/1056 ,  Y10T156/1075 ,  Y10T156/13 ,  Y10T156/1304

摘要： In a method for manufacturing a laminated iron core from a thin sheet, the method includes coining the thin sheet from below to form a thinned bridge portion on an outer peripheral portion of an iron core piece, blanking the iron core piece from the thin sheet from above or below after forming the bridge portion, and laminating the iron core piece on another iron core piece to manufacture the laminated iron core.

公开(公告)号：US10751782B2

公开(公告)日：2020-08-25

申请号：US16064701

申请日：2016-01-27

申请人： Mitsui High-tec, Inc.

发明人： Akihiro Hashimoto ,  Tadashi Iida ,  Masahiro Izumi

IPC分类号： B21D39/03 ,  H02K15/02 ,  B21D37/08 ,  B21D28/02 ,  B21D28/04 ,  B21D28/14 ,  B21D43/22

摘要： At least one caulking group (13) that includes a plurality of caulking parts (14, 15) with different directions is formed on a plurality of thin plates (10) placed in a stacked state to fix the position of the stacked thin plates (10), and then a preset punching process is performed with respect to the thin plates (10) that have been positioned with pilot holes (12). This makes it possible to perform a high-accuracy punching process when punching the plurality of thin plates (10) placed in a stacked state, since positional deviations between the thin plates (10) are avoided and pilot pins (11) are prevented from deforming the periphery of the pilot holes (12).

公开(公告)号：US20190009324A1

公开(公告)日：2019-01-10

申请号：US16064701

申请日：2016-01-27

申请人： Mitsui High-tec, Inc.

发明人： Akihiro Hashimoto ,  Tadashi Iida ,  Masahiro Izumi

IPC分类号： B21D39/03 ,  B21D28/04 ,  B21D28/14

摘要： At least one caulking group (13) that includes a plurality of caulking parts (14, 15) with different directions is formed on a plurality of thin plates (10) placed in a stacked state to fix the position of the stacked thin plates (10), and then a preset punching process is performed with respect to the thin plates (10) that have been positioned with pilot holes (12). This makes it possible to perform a high-accuracy punching process when punching the plurality of thin plates (10) placed in a stacked state, since positional deviations between the thin plates (10) are avoided and pilot pins (11) are prevented from deforming the periphery of the pilot holes (12).

公开(公告)号：US09641055B2

公开(公告)日：2017-05-02

申请号：US14742012

申请日：2015-06-17

申请人： MITSUI HIGH-TEC, INC. ,  PANASONIC CORPORATION

发明人： Akihiro Hashimoto ,  Tadashi Iida ,  Kiyomi Kawamura ,  Koichi Mitamura

IPC分类号： H02K15/02 ,  B21D28/10 ,  H02K15/03 ,  B65H35/00 ,  B21D28/22 ,  B21D28/26 ,  B21D28/24

CPC分类号： H02K15/03 ,  B21D28/10 ,  B21D28/22 ,  B21D28/246 ,  B21D28/26 ,  B65H35/0006 ,  B65H35/008 ,  H02K15/02 ,  H02K15/024 ,  Y10T156/1002 ,  Y10T156/1056 ,  Y10T156/1075 ,  Y10T156/13 ,  Y10T156/1304

摘要： In a method for manufacturing a laminated iron core from a thin sheet, the method includes coining the thin sheet from above to form a thinned bridge portion on an outer peripheral portion of an iron core piece, blanking the iron core piece downwardly from the thin sheet using a set of an outer-shape blanking punch and a die after forming the bridge portion, wherein the outer-shape blanking punch includes a projection portion fitted into the bridge portion when blanking, and laminating the iron core piece on another iron core piece to manufacture the laminated iron core.