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公开(公告)号：US12076774B2
公开(公告)日：2024-09-03
申请号：US17805457
申请日：2022-06-04
Inventor： Hideaki Hamada , Mitsuo Saitoh , Naoki Nojiri
CPC classification number: B21D24/10 , B21D22/20 , B30B15/0094 , B30B15/26
Abstract: A press-forming apparatus includes a punch, a die having an inclined surface, and a die holding plate. A blank holder has a holding surface, and a die load sensor detects a load in a pressing direction, a load in a first direction perpendicular to the pressing direction, and a load in a second direction perpendicular to the first direction. A controller calculates a normal force of the die based on the loads in the pressing direction, in the first direction, and in the second direction. The loads are detected by the die load sensor, and the controller calculates the amount of correction of clearance between the die and the blank holder based on the normal force of the die. The first driver moves the die in the pressing direction based on the amount of correction of clearance, and a second driver drives the punch in the pressing direction.
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公开(公告)号：US11146126B2
公开(公告)日：2021-10-12
申请号：US16278527
申请日：2019-02-18
Inventor： Yukio Nishikawa , Mitsuo Saitoh
IPC: H02K1/16 , H02K1/22 , H02K1/18 , H02K1/02 , H01F3/02 , H01F27/26 , H02K15/02 , H01F27/245 , H01F3/04 , H01F3/10 , H01F27/25 , H02K1/14 , H02K1/27
Abstract: An iron core including a laminate of a plurality of fixed electromagnetic steel sheets, a laminate of alloy thin strips which is sandwiched between the laminate of the electromagnetic steel sheets, a fastening mechanism which penetrates the laminates of electromagnetic steel sheets and alloy thin strips, and a fixing base. The laminate of alloy thin strips reduces compressive and torsional forces acting on the laminate of alloy thin strips by using the iron core having a structure in which upper and lower portions of a laminate of alloy thin strips having nanocrystal grains are sandwiched together with laminates of amorphous alloy thin strips. Furthermore, a motor including a rotor and the above-described iron core is used.
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公开(公告)号：US11601021B2
公开(公告)日：2023-03-07
申请号：US16836950
申请日：2020-04-01
Inventor： Mitsuo Saitoh , Naoki Nojiri , Hideaki Hamada , Kenji Tanimoto , Fumihiko Kawai , Yukio Nishikawa
Abstract: A motor includes a rotor and a stator. The stator is formed by laminating a plurality of magnetic thin strips each having a plurality of teeth parts. The magnetic thin strip includes an elliptical-shaped inner diameter part formed along tip end portions of the plural teeth parts. At least one magnetic thin strip in the laminated magnetic thin strips is shifted by a given angle with respect to other magnetic thin strips in a horizontal direction, and positions of all teeth parts of the laminated magnetic thin strips correspond to one another to reduce cogging torque.
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4.发明授权公开(公告)号：US11270821B2
公开(公告)日：2022-03-08
申请号：US16019458
申请日：2018-06-26
Inventor： Masato Maede , Kazuto Fukuda , Toshiyuki Kojima , Mitsuo Saitoh
Abstract: A soft magnetic powder that can exhibit desirable soft magnetic characteristics. A dust core using the soft magnetic powder is also provided. The soft magnetic powder includes: a soft magnetic powder layer of an unoxidized soft magnetic material; a second oxide layer as an oxide with iron or boron residing around the soft magnetic powder layer; and a first oxide layer of an iron oxide residing around the second oxide layer. The first oxide layer and the second oxide layer reside in a region of 20 nm or more and 500 nm or less from a surface of the soft magnetic powder, and are absent in a region of more than 500 nm and 1,600 nm or less from the surface.
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