Mitsui High-tec Incorporated

Other

Panasonic Corporation

Mitsubishi Electric Corporation

Akihiro Hashimoto

Tadashi Iida

Kiyomi Kawamura

Takahiro Shimizu

Koichi Mitamura

Yoshihiro Harada

Yusuke Hasuo

Yoshiro Imazawa

Masahiro Izumi

Daisuke Komiya

Masahiko Furuta

Toshio Goto

Kenichirou Iwata

A method of manufacturing a stacked core includes forming a first pilot hole in a metal plate, forming a worked portion of the metal plate in a state in which a first pilot pin is inserted into the first pilot hole, the worked portion being displaced relative to a plane of the metal plate, press-fitting the worked portion of the metal plate to reposition the worked portion to extend along the plane of the metal plate, forming a second pilot hole in the metal plate after press-fitting the worked portion of the metal plate, and forming a blanked member by blanking the metal plate in a state in which a second pilot pin is inserted into the second pilot hole, the blanked member including the worked portion.

Method of manufacturing stacked core and apparatus for manufacturing stacked core

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.

Method of manufacturing laminated core

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

Method for processing laminated material

A method for manufacturing a laminated iron core includes setting a blanking position on a strip-shaped workpiece for iron core pieces each including a yoke piece part having a linear shape and a magnetic pole piece part extending from the yoke piece part, such that a pair of iron core pieces are opposed each other and the magnetic pole piece part of one iron core piece is arranged between adjacent magnetic pole piece parts of the other iron core piece among the pair of iron core pieces, simultaneously blanking a front end side of the magnetic pole piece part and a back surface side of the yoke piece part of the one iron core piece from the strip-shaped workpiece before simultaneously blanking those of the other iron core piece from the strip-shaped workpiece, and blanking the iron core pieces from the strip-shaped workpiece.

Method for manufacturing laminated iron core and apparatus for manufacturing laminated iron core

At the time of manufacturing both a laminated rotor coreand a laminated stator coreby punching out a plurality of iron core piecesandfrom a same strip materialand laminating the punched out iron core piecesand, respectively, a plurality of kinds of laminated rotor coresandare manufactured by further punching out a plurality of iron core piecesfrom the strip materialand laminating the punched out iron core pieces. Here, the plurality of kinds of the laminated rotor coresandcan be used for different electric motors.

Method and apparatus for manufacturing laminated cores

A die apparatus includes a first die and a second die which are respectively used in adjacent working stations that sequentially blank or stamp out a progressively fed thin metal sheet. The first and second dies are held in a state where outer peripheral surfaces of the first and second dies directly contact each other.

Die apparatus and manufacturing method of metal product using die apparatus

There is provided a method for producing a rotor laminated core by laminating circular core pieces. The method determines a first blanking area, a second blanking area and a third blanking area in the magnetic steel board, wherein the first blanking area defines a shape of the core piece, the second blanking area defines a shape of a magnet-insertion hole, and the third blanking area defines a shape of an arbitrary part in the magnetic steel board. The method also forms a temporary aperture in the second blanking area, forms a thinning part which extends from the temporary aperture to the third blanking area, and blanks the first blanking area, the second blanking area and the third blanking area, thereby producing each circular core piece including the thinning part and magnet-insertion holes formed in a circumferential direction.

Method for producing rotor laminated core

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.

Method for manufacturing laminated iron core

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.

A stator coreand its manufacturing method, the stator coreincluding laminated stator core sheets, each of the stator core sheetspunched out from a magnetic metal sheet, a central portion of the magnetic metal sheetpreviously punched out to form a rotor core sheet, the stator coreincluding a thin sectionformed in a magnetic pole pieceof each of the stator core sheets, the thin sectionformed by pressing both sides of the magnetic pole piecein a thickness direction and radially-inwardly elongating the magnetic pole piece. The present invention prevents the magnetic pole piecefrom being curved and improves interlocking accuracies and dimensional accuracies in blanking the rotor core sheetand the start core sheetfrom one magnetic metal sheet

Stator core and method of manufacturing same

A method for manufacturing a laminated core includes (1) blanking a rotor core sheetand a stator core sheetfrom a thin strip materialand (2) laminating the stator core sheetinside a die. The stator core sheetincludes a ring-shaped yoke pieceand plural magnetic pole piecesintegrally connecting to a radially inside of the yoke piece. Each of the magnetic pole piecesincludes a magnetic pole shaft pieceand a magnetic pole tooth piece. The magnetic pole piecesare formed by blanking preparatory slots; coining a part or a whole of the magnetic pole shaft piecesto elongate the same in a radially inward direction; and thereafter, blanking the finishing slotsand shaping the magnetic pole tooth pieces

Growing community of inventors

Kitakyushu, Japan

Akihiro Hashimoto