Patents Assigned to Mitsui High-tec Inc.
  • Method of manufacturing laminated core
    Patent number: 10298102
    Abstract: A method of manufacturing a laminated core is provided. The manufacturing method includes the steps of feeding a belt-like sheet of core material to a progressive die, stamping out core pieces having a first shape from the core material, stacking more than one of the core pieces having the first shape to obtain a first laminate block, stamping out core pieces having a second shape from the core material, stacking more than one of the core pieces having the second shape to obtain a second laminate block, discharging a laminate including the first laminate block and the second laminate block from the progressive die, changing the lamination order of the laminate blocks constituting the laminate, and integrating the laminate after the lamination order of the laminate blocks are changed.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: May 21, 2019
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Katsuhiro Sasaki, Takashi Fukumoto, Mei Ogata
  • Method for measuring laminated iron core
    Patent number: 10288414
    Abstract: There is provided a method for measuring a laminated iron core. The method includes preparing a laminated iron core in which two or more kinds of metal plates with different shapes are laminated and a deformed part is formed inside a hole continuing in a lamination direction of the laminated iron core, acquiring a surface profile data indicating a surface shape of the deformed part through an inlet of the hole by a non-contact sensor located in an outside of the hole, and calculating a size of the deformed part by a calculator based on the surface profile data.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: May 14, 2019
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Go Kato, Takashi Fukumoto, Kazuki Namaike, Syoichi Ono
  • Method and apparatus for manufacturing laminated cores
    Patent number: 10284058
    Abstract: At the time of manufacturing both a laminated rotor core 13 and a laminated stator core 14 by punching out a plurality of iron core pieces 11 and 12 from a same strip material 10 and laminating the punched out iron core pieces 11 and 12, respectively, a plurality of kinds of laminated rotor cores 13 and 13a are manufactured by further punching out a plurality of iron core pieces 11a from the strip material 10 and laminating the punched out iron core pieces 11a. Here, the plurality of kinds of the laminated rotor cores 13 and 13a can be used for different electric motors.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: May 7, 2019
    Assignee: MITSUI HIGH-TEC, INC.
    Inventor: Akihiro Hashimoto
  • Method for manufacturing workpiece and method for manufacturing laminated core
    Patent number: 10284062
    Abstract: This disclosure relates to a method for manufacturing a workpiece for a segmented laminated core. This method includes (A) feeding a plate for processing drawn from a roll thereof to a progressive die and (B) stamping out a workpiece in the progressive die, the workpiece including a plurality of pieces aligned in the circumferential direction with a circumferential part. At the step (B), an overall portion configured to be each piece of the workpiece is displaced in the thickness direction of the plate for processing, with portions on both sides of the piece being fixed, to form at least one cutting line across a region configured to be the circumferential part.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: May 7, 2019
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Yusuke Hasuo, Masahiro Izumi
  • METHOD OF MANUFACTURING LAMINATED CORE
    Publication number: 20190115811
    Abstract: A method of manufacturing a laminated core includes supplying a stator material to a punching device and obtaining an electromagnetic steel plate corresponding to a rectangular processed body by punching the stator material. To obtain the electromagnetic steel plate ES, a slit is formed outside a processed body forming area in the stator material along a long side of the processed body forming area, and a center portion of the processed body forming area is punched out in a circular shape. Additionally, the processed body forming area is punched out after the slit is formed and the center portion is punched out. The laminated core is obtained by laminating and fastening a plurality of the electromagnetic steel plates.
    Type: Application
    Filed: October 12, 2018
    Publication date: April 18, 2019
    Applicant: Mitsui High-tec, Inc.
    Inventors: Akihiro HASHIMOTO, Takahiro SHIMIZU
  • LAMINATED IRON CORE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20190109522
    Abstract: In a laminated iron core formed by laminating a plurality of iron core pieces, at least one of an inner circumferential portion or an outer circumferential portion of the iron core piece is provided with a connection recess part which is connected with a connection part of a caulking piece detachable in a radial direction from the connection recess part, an outer circumferential edge of the connection part has the same shape as an inner circumferential edge of the connection recess part, and a bottom portion of the connection recess part is not configured by a single straight line.
    Type: Application
    Filed: April 28, 2017
    Publication date: April 11, 2019
    Applicant: MITSUI HIGH-TEC, INC.
    Inventor: Yusuke HASUO
  • Die apparatus and method for blanking thin plate
    Patent number: 10252318
    Abstract: A die apparatus includes an upper die and a lower die used for blanking a thin plate, a stripper which is formed on the upper die and is arranged between the upper die and the lower die, and a punch which blanks a part of the thin plate. The stripper or the lower die is provided with a protruding part which reduces flexure of the stripper occurring when a test punching is performed by actuating the punch without the thin plate.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: April 9, 2019
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Masahiro Izumi, Shinichiro Ono, Kenichi Takasaki
  • MANUFACTURING METHOD OF STACKED CORE AND MANUFACTURING DEVICE OF STACKED CORE
    Publication number: 20190089231
    Abstract: The manufacturing method of a motor core includes attaching an ID code to a stack of blanked members in which a magnet insertion hole to fill with a resin material is formed, the ID code containing information in accordance with a type of the stack, reading the information from the ID code which is attached to the stack, and setting a mold condition based on the information read from the ID code. The mold condition includes at least one type of condition including: the resin material to be injected to the magnet insertion hole, an injection amount of the resin material, and a discharge position of the resin material. A mold device is controlled to inject the resin material to the magnet insertion hole in accordance with the mold condition.
    Type: Application
    Filed: September 14, 2018
    Publication date: March 21, 2019
    Applicant: Mitsui High-tec, Inc.
    Inventors: Hisatomo ISHIMATSU, Shuhei KOTANI, Hirotoshi MABU, Tomoyoshi ICHIMARU
  • METHOD FOR MANUFACTURING ROTOR CORE
    Publication number: 20190089229
    Abstract: A method for manufacturing a rotor core includes detecting a height of a projecting portion formed on a lower die by a height detecting unit, and placing onto the lower die a core body in which a magnet insertion hole is formed such that the projecting portion is positioned in the magnet insertion hole when the height detecting unit has determined that the height of the projecting portion is within a set range. Additionally, the method includes bringing a permanent magnet in the magnet insertion hole into contact with an upper end of the projecting portion, and placing onto the core body a holding member after bringing the permanent magnet into contact with the upper end of the projecting portion. Melted resin is injected into the magnet insertion hole in which the permanent magnet has been inserted after placing the holding member onto the core body.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 21, 2019
    Applicant: Mitsui High-tec, Inc.
    Inventors: Kei Sameshima, Shoichi Ono, Go Kato
  • METHOD FOR PROCESSING LAMINATED MATERIAL
    Publication number: 20190009324
    Abstract: 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).
    Type: Application
    Filed: January 27, 2016
    Publication date: January 10, 2019
    Applicant: Mitsui High-tec, Inc.
    Inventors: Akihiro Hashimoto, Tadashi Iida, Masahiro Izumi
  • Method of manufacturing laminated core
    Patent number: 10177636
    Abstract: A method of manufacturing a laminated core includes inserting permanent magnets 14 into magnet insertion holes 12, 12a of a core body 13; injecting a resin 18 into the holes 12, 12a from resin reservoir pots 17 in the die 15 (16) to fix the magnets 14; placing a dummy plate 19 between the die 15 having the pots 17 and the body 13, the plate 19 having gate holes 35, 35a guiding the resin 18 from the pots 17 into the holes 12, 12a, the hole 35 (35a) overlapping with both of a part of the hole 12 (12a) and a surface of the body 13; poring the resin 18 via the holes 35, 35a and curing the resin 18 in the holes 12, 12a; and separating the plate 19 from the body 13 to remove the resin 18 overflowed from the holes 12, 12a.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: January 8, 2019
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Yuichi Hirayama, Kento Aono, Naoki Isomura
  • Laminated iron core and manufacturing method of laminated iron core
    Patent number: 10170962
    Abstract: A laminated iron core includes laminated iron core pieces, in which coupling parts are formed so as to communicate in a lamination direction of the laminated iron core pieces, and the coupling parts are filled with resins. The laminated iron core satisfies the following formula: (T×S)/?>{(4×E×?×w×t3)/L3}×n, where T is a strength (N/mm2) of the resin; S is a cross-sectional area (mm2) of the coupling part or the resin; E is a Young's modulus (N/mm2) of the strip material; ? is a distortion amount (mm) of the iron core piece; w is a width (mm) of the iron core piece in a radial direction; t is a plate thickness (mm) of the iron core piece; n is the number of laminated iron core pieces; L is a distance (mm) between the coupling parts adjacent in the circumferential direction; and ? is a safety factor.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: January 1, 2019
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Yusuke Hasuo, Toyoshi Odahara
  • Laminated core
    Patent number: 10170947
    Abstract: A laminated core 10 including a plurality of laminated iron core pieces, each of the iron core pieces being connected in a laminating direction by filling resin in a plurality of resin holes penetrating the laminated core 10 in the laminating direction, and a method for manufacturing the laminated core 10, by making a junction area of an iron core piece (A) 13 and resin larger than a junction area of an iron core piece (U) 14 and resin, the iron core piece (A) 13 being provided on an end in an axial direction, the iron core pieces (U) 14 being arranged at positions other than the end in the axial direction, or by providing locking portions at tip portions of resin, acquired joint strength of the iron core piece (A) 13.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: January 1, 2019
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Takashi Fukumoto, Jin Oda, Shogo Tezuka, Mei Ogata
  • Separation jig, separation apparatus and separation method for laminated core
    Patent number: 10158275
    Abstract: A separation apparatus for a laminated core is configured to separate an annular laminated core, which includes a plurality of core pieces each of which includes a yoke portion and a tooth portion extending from the yoke portion in a direction intersecting the yoke portion and is integrated by the temporary connection of the adjacent core pieces at end portions of the yoke portions, into the respective core pieces. The separation apparatus includes a plurality of separation members that are movable in a radial direction of the laminated core and are disposed so as to be arranged in a circumferential direction of the laminated core, and an actuator that is configured to apply an outward force in the radial direction to the laminated core through the respective separation members by moving the respective separation members outward in the radial direction.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: December 18, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Satoshi Matsubayashi, Hayato Nakayama
  • LAMINATED CORE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20180358871
    Abstract: A laminated iron core is made of a stator iron core formed by laminating a plurality of iron core pieces with a predetermined shape, and a caulking block detachable along a radial direction is formed in each of the iron core pieces. In a method for manufacturing the laminated iron core, the caulking block detachable along the radial direction is provided in each of the iron core pieces, and the iron core pieces are laminated and joined through the caulking blocks and are arranged on a jig and then, the caulking blocks are pulled in the radial direction and are detached from the laminated iron core pieces, and the laminated iron core pieces are joined by a resin.
    Type: Application
    Filed: November 10, 2015
    Publication date: December 13, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Yusuke HASUO, Masahiro IZUMI
  • METAL PRODUCT MANUFACTURING METHOD
    Publication number: 20180336374
    Abstract: A method of manufacturing a metal product includes forming a first identification code onto a surface of a metal member with a laser beam, the first identification code being readable under a first reading condition, and heating the metal member on which the identification code is formed. The method further includes reading the first identification code with a reading device, and forming a second identification code onto the surface of the metal member subsequent to the heating with a laser beam based on the first identification code which is read with the reading device. The second identification code is readable under a second reading condition different from the first reading condition.
    Type: Application
    Filed: May 18, 2018
    Publication date: November 22, 2018
    Applicant: Mitsui High-tec, Inc.
    Inventors: Jin ODA, Junya SATAKE
  • Method for manufacturing a laminate and method for manufacturing a rotor
    Patent number: 10128726
    Abstract: A method for manufacturing a laminate used for manufacturing a rotor is provided. The method includes: (a) stamping out a plurality of workpieces from a metal sheet wherein each of the workpieces has a temporarily-interlocking portion; and (b) obtaining a laminate including the workpieces integrated together by the temporarily-interlocking portion, wherein each of the workpieces further has a shaft hole, a magnet insertion hole, and a weight-reducing hole formed between the shaft hole and the magnet insertion hole, and the temporarily-interlocking portion is provided to the weight-reducing hole.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: November 13, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Yukio Matsunaga, Hisatomo Ishimatsu, Yusuke Hasuo, Masahiro Izumi, Manabu Yazaki
  • PROCESSING DEVICE AND PROCESSING METHOD
    Publication number: 20180318906
    Abstract: A processing device is provided which feeds a long plate body from an upstream side to a downstream side and sequentially carries out a press work including a blanking work to the long plate body. The processing device includes a plurality of stages provided along a feed direction of the long plate body, which has a die that applies the press work to the long plate body and a plurality of lifters provided along the feed direction of the long plate body which have lift-up parts that lift up the long plate body from the die. In the plurality of lifters, clearances by the lift-up parts of the lifters arranged in the downstream side are set to be larger than the clearances by the lift-up parts of the lifters arranged in the upstream side.
    Type: Application
    Filed: July 18, 2018
    Publication date: November 8, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventors: Masahiko FURUTA, Kazufumi YONEMURA
  • Method for forming blanked piece and manufacturing method of laminated body and laminated iron core using blanked piece formed by method for forming blanked piece
    Patent number: 10118212
    Abstract: A method for forming a blanked piece from a material, where the blanked piece includes a production area having a through hole and at least one caulking and connection area protruding inside the through hole. The method includes forming a blanking hole in the material in a prescribed outline, placing a guide member in the through hole, where the guide member has an abutting part contacting a protrusion of the material formed along the outline of the blanking hole. The method further includes cutting and separating the material to blank or stamp out downward the caulking and connection area, pushing back the caulking and connection area, and temporarily connecting the caulking and connection area to the material; and blanking or stamping an outer configuration of the product area from the material to which the caulking and connection area is temporarily connected.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: November 6, 2018
    Assignee: MITSUI HIGH-TEC, INC.
    Inventors: Shinichiro Ono, Masahiro Izumi, Shigetoshi Yamato
  • MANUFACTURING METHOD OF LAMINATED CORE AND CULL PLATE
    Publication number: 20180304505
    Abstract: A manufacturing method of a laminated core includes holding a laminated core body mounted on a cull plate, injecting a resin to a magnet-insert hole from a resin reservoir part provided in a lower die through the cull plate, then ejecting the laminated core body and the cull plate and separating the cull plate from the laminated core body. The cull plate includes a through hole which forms at least a part of a flow path extended from the resin reservoir part to an upper surface of the cull plate. The through hole of the cull plate includes a tapered portion and a straight pipe portion being adjacent to the tapered portion. The tapered portion has an inner diameter gradually decreasing toward the upper surface of the cull plate, and the straight pipe portion has a constant inner diameter in a height direction.
    Type: Application
    Filed: April 11, 2018
    Publication date: October 25, 2018
    Applicant: MITSUI HIGH-TEC, INC.
    Inventor: Hisatomo ISHIMATSU