Mitsui High-tec Incorporated

Toyota Jidosha Kabushiki Kaisha

Other

Mistui High-tec, Inc.

Akira Nagai

Go Kato

Jin Oda

Iwao Myojin

Kohei Yoshida

Masafumi Sakuma

Tatsuhiko Mizutani

Akinori Hoshino

Hiroyuki Yamamoto

Haruji Suzuki

Kenji Katsuki

Masashi Matsumoto

Satoshi Matsubayashi

Yoshitada Yamagishi

Yosuke Kurono

Hidemi Sasaki

Kazuki Namaike

Mei Ogata

Shogo Tezuka

Mei Arazoe

Yuzo Ohta

A method of manufacturing a rotor core having a plurality of core members stacked together includes determining weight imbalances for the plurality of core members with respect to a central axis of the rotor core; combining the weight imbalances of the plurality of core members to determine a weight distribution of the rotor core; and displacing the weight imbalances of one or more of the plurality of core members to adjust a position of the weight distribution of the rotor core with respect to the central axis.

Method of manufacturing laminated rotor core

In the case of a laminated rotor core, insertion of permanent magnetsand filling of resininto each of magnet insertion holesare performed in order to cancel out a problem of an imbalanced weight estimated from a deviation of lamination thickness in a circumferential direction of a laminated core body, and a manufacturing method includes a step of measuring a deviation of lamination thickness in which an imbalanced weight is estimated by measuring the deviation of lamination thickness in the circumferential direction of the laminated core body, and a step of balance adjustment in which the insertion of the permanent magnetsinto each of the magnet insertion holesand the filling of resininto each of the magnet insertion holesare performed in a manner that cancels out a problem of this imbalanced weight.

Laminated rotor and method for balancing the same

The method includes a step of aligning and laminating enlarged iron core pieces including iron core pieces and dummy piece parts and forming a composite laminated iron core integrally including a dummy laminated part with the dummy piece parts laminated and a laminated iron core, a step of placing and positioning the composite laminated iron core on a jig and removing the dummy laminated part, and a step of mutually bonding the laminated iron core body with the dummy laminated part removed to form the laminated iron core.

Method for manufacturing laminated core

In a method of manufacturing a laminated core, a laminated core bodyincluding magnet insertion holesandwith magnet piecesinserted therein is placed between a molding (upper) dieand a retaining (lower) dieand a molding resinis filled from resin reservoir portions (pots)to fix the piecesin the holesandBetween the dieand the bodya guide memberis placed, which includes resin passagesprovided from the portionsto the holesandand gatesconnecting to the holesandon downstream sides of the passagesThe method can reduce lead time of a production line without replacing the molding dies for different laminated rotor cores and thus without preparing different types of molding dies.

Method of manufacturing laminated core

A method of manufacturing a laminated iron core includes extruding resins from a plurality of plungers toward a plurality of through holes extending from an upper surface to a lower surface of a laminated body formed of a plurality of electromagnetic steel plates to fill the plurality of through holes with the resins. The plurality of plungers are mutually independent and an extrusion amount of the resin is controlled for each plunger.

Method and apparatus for manufacturing laminated iron core

In a method of manufacturing a laminated core, a laminated core bodyincluding magnet insertion holesandwith magnet piecesinserted therein is placed between a molding (upper) dieand a retaining (lower) die, and a molding resinis filled from resin reservoir portions (pots)to fix the piecesin the holesand. Between the dieand the body, a guide memberis placed, which includes resin passagesprovided from the portionsto the holesandand gatesconnecting to the holesandon downstream sides of the passages. The method can reduce lead time of a production line without replacing the molding dies for different laminated rotor cores and thus without preparing different types of molding dies.

There is provided a method of manufacturing a laminated rotor core, including: a mounting step of placing a core body on a carrier tray, the core body having a plurality of magnet insertion holes provided around the shaft hole, the carrier tray having a mount plate and a columnar guide member standing on a front surface of the mount plate, the placement of the core body being carried out by fitting the guide member into the shaft hole; an inserting step of inserting permanent magnets respectively in the magnet insertion holes; an injecting step of injecting a liquefied resin material in each of the magnet insertion holes; and a first preheating step of heating the core body before the mounting step, wherein the inserting step and the injecting step are carried out in a state in which the core body is placed on the carrier tray.

A method for manufacturing a laminated core, in which while a laminated core bodyformed by caulking and with permanent magnetsinserted in a plurality of magnet insertion holesis held between a resin injection dieand a receiving dieopposed to each other, resin is injected into the magnet insertion holesfrom resin reservoir portions provided to the resin injection dieto fix the permanent magnets, the method comprising: at a time of resin injection, pressing a flat press surfaceof the resin injection dieagainst caulking portionsprotruding from a surface of the laminated core bodyto apply pressure thereto, thereby allowing the surface of the laminated core bodywhereon the caulking portionsare formed to be pressed against the flat press surfaceso as to prevent resin leakage.

A method of resin sealing a permanent magnet in a magnet insertion portion of a laminated body, the body formed by laminating plural core sheets and including the plural portions formed around a shaft hole in a center of the plural portions, the portion connected to an internal space via an opening. The method includes a first process of positioning a blocking member blocking the opening from a side of the space in a way that the member is vertically-placed in a lower die or an upper die, while the both dies hold the body from both sides in an axial direction and close the portion; and a second process of filling a resin extruded from a resin reservoir portion provided in the die or the die into the portion having the magnet inserted and having the opening closed by the member.

Method of resin sealing permanent magnet and laminated core manufactured thereof

A method of manufacturing a laminated core, having a laminated core bodyformed by laminating plural core sheetsand having magnet insertion holeswith openingsopening to a inner spaceor an external side, inserting and resin-sealing permanent magnetsin the magnet insertion holes, with the openingsblocked by a blocking member, the method including: temporarily connecting blocking member piecesto be the blocking memberin each of the core sheetsand removing the blocking memberwith the laminated core bodyresin-sealed. By this, without a special blocking member, the permanent magnetsare resin-sealed while the magnet insertion holes, parts of which have the openings, are blocked.

Method of manufacturing laminated core having permanent magnets sealed with resin

A laminated iron core and a method for manufacturing the same are provided to secure the lamination strength of the respective iron core pieces thereof, and to provide good magnetic efficiency and to reduce a loss. In a laminated iron core including a first caulking section formed in an area thereof having larger magnetic flux density than other area and a second caulking section formed in the other area, the engagement area A of the recessed sub-sections and projecting sub-sections of the first caulking sections of divided iron core pieces adjoining each other in the laminating direction is set smaller than the engagement area B of the recessed sub-sections and projecting sub-sections of the second caulking sections adjoining each other in the laminating direction.

Laminated iron core and method for manufacturing same

There is provided a rotor core which increases the quality and reliability thereof by preventing the occurrence of a core separation of the rotor core. There is provided a rotor core including a plurality of substantially cylindrical core blocks which are stacked on each other; and a plurality of magnets, characterized in that a plurality of magnet holes extending in an axial direction are provided in the plurality of core blocks so as to extend over the plurality of core blocks in that the plurality of magnets are accommodated in each of the plurality of magnet accommodation holes and fixed therein with a resin, and in that an axial position of core block boundary planes where the plurality of core blocks are brought into abutment with each other and an axial position of magnet boundary planes where the plurality of magnets are brought into abutment with each other differ from each other.

Rotor core

A method for manufacturing a laminated core is provided that makes positions of boundary parts of laminated blocks and improves an efficiency of a welding operation of the blocks. The above-described object is achieved by the method of manufacturing the laminated coreincluding a process that forms a plurality of blockshaving a plurality of welding partstoof different forms or colors at intervals of prescribed angles in the circumferential direction, a process that laminates the plurality of blocksunder a state that the blocks are rotated at intervals of the prescribed angles and a process that welds the welding partstohaving the different forms or colors of the laminated blocksto form integrally the plurality of blocks

Method for manufacturing laminated core and laminated core

A method of manufacturing a laminated rotor core, includes a first process of placing segment dummy plates between an iron core and a die, each of each segment dummy plates covering one or more of plural magnet insertion portions and including a resin injection hole communicating to the one or more of the magnet insertion portions; a second process of injecting a resin from resin reservoir parts formed in any one of an upper die and a lower die holding the iron core through the resin injection hole of each segment dummy plate to the corresponding one or more of the magnet insertion portions; and a third process of detaching the segment dummy plates together with excess resin after the resin injected to the one or more of the magnet insertion portions is cured.

A laminated core () and a method for manufacturing the same formed with multiple continuous segment core pieces () wound in a spiral form by bending connecting portions () mutually connecting the segment core pieces (), the connecting portions () being formed in an outer peripheral area (), while the connecting portions () of vertically adjacent layers being displaced in a circumferential direction with inner edges or outer edges of the segment core pieces () fitted, the laminated core comprising: a concave cutout () provided in a radial exterior of each connecting portion () to dispose a radially expanded portion () within an outer circle of the laminated core (), the radially expanded portion () being formed with each connecting portion () expanding radially outward at the time of bending each connecting portion (); an interior cutout () provided in a radial interior of each connecting portion () to define a bending position of each connecting portion (); and a receptacle () provided in a radial exterior of each segment core piece () to receive an expanded part () formed in the thickness direction at the time of bending each connecting portion ().

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Kitakyushu, Japan

Akira Nagai