Disclosed herein is a bonded-type laminated core member manufacturing apparatus comprising an adhesive application unit to apply an adhesive to a material being continuously transferred, and a laminating unit to integrate laminar members laminated within a laminating hole by blanking the material, a laminated core member being manufactured by interlayer adhesion between the laminar members, wherein the laminating unit includes a high-frequency heater to harden the adhesive located between the laminar members, the high-frequency heater including a coil wound on the circumference of a hardening hole which accommodates the laminar members and forming a passage of high-frequency current. In accordance with the present invention, the adhesive is rapidly hardened by high-frequency induction heating and thus the integration time of the laminated core member is shortened, and accuracy of the laminating unit, which integrates the laminar members, i.e., straightness of the laminating hole to pass the laminar members, is stably maintained and, thus, misalignment of the laminated core members is prevented and management of product quality is facilitated.

A laminated member as a laminate of a plurality of alloy ribbons is used. The laminated member has a side surface with a fracture surface. A laminated body as a laminate of the laminated member is used. A motor that includes a core using the laminated body is used. A method for manufacturing a laminated member is used that includes: fixing a plurality of amorphous ribbons to one another in a part of layers of the amorphous ribbons after laminating the amorphous ribbons; and punching a laminated member by cutting the laminate of the amorphous ribbons at a location that excludes the portion fixing the amorphous ribbons in the laminate.

An electromagnetic device is disclosed, the electromagnetic device comprising a core support having an exterior surface comprising at least one radial protrusion, a tubular magnetic core positioned around a portion of the length of the core support, the tubular magnetic core having an interior surface, at least one indent located in the interior surface of the tubular magnetic core, wherein the at least one protrusion is located within the at least one indent to prevent relative longitudinal movement between the core support and tubular magnetic core, and a primary coil and at least one secondary coil, each coil positioned around a portion of a length of the tubular magnetic core.

Disclosed is a method of manufacturing a magnetic field shielding sheet. The method of manufacturing a magnetic field shielding sheet formed as a plurality of divided pieces includes preparing a magnetic sheet formed of a magnetic material and having a first area and punching the magnetic sheet to form a shielding sheet using a mold such that the shielding sheet having a second area which is narrower than the first area is separated from the magnetic sheet, wherein the punching of the magnetic sheet to form the shielding sheet includes forming at least one linear slit in an inner region of the second area using the mold such that the shielding sheet is divided into a plurality of pieces while the shielding sheet is separated from the magnetic sheet to have the second area.

A method of manufacturing a laminated iron core includes: inserting a plurality of electrical steel strips in a superposed state to feed rolls including a pair of upper and lower feed rolls that are driven by a drive device to feed the electrical steel strips in a superposed state into a die having a plurality of punching processes in sequence; joining a part or all of the superposed electrical steel strips together before entering the die or at an upstream stage portion of the die after feeding out the electrical steel strips from the pair of upper and lower feed rolls; and punching simultaneously the plurality of electrical steel strips in a superposed state in the die.

A method for producing an electromagnet from a metal core and at least one metal wire is disclosed and may include joining a plurality of metal plates into the metal core by packing and winding at least one metal wire around the assembled metal core. Each metal plate may include plastically shaped areas and the plastically shaped areas of the metal plate may be connected by force-locking and/or form-fitting to the plastically shaped area of at least one adjacent metal plate in a joining direction. A multitude of windings may be wound around the metal core. The windings may be placed next to each other and/or on top of one another and a partial region of each winding may be oriented parallel to the joining direction. Furthermore, an electromagnet produced according to the method and a rotor of an electric machine having at least one electromagnet are disclosed.

A laminated core manufacturing device includes: an overlapping unit configured to overlap the plurality of laminated core materials conveyed along different conveyance routes; an edge position correction unit configured to align edge positions in a width direction of the plurality of laminated core materials between the plurality of laminated core materials and to correct shift of each edge position of the plurality of laminated core materials with respect to a standard edge position; an uplift prevention unit configured to prevent uplift of the plurality of laminated core materials; and a punching unit configured to punch out the plurality of laminated core materials which are overlapped by the overlapping unit and have been subjected to a process to align the edge positions and to correct shift of the edge positions performed by the edge position correction unit, and a process to prevent the uplift performed by the uplift prevention unit.

There is provided a laminated iron core including a plurality of piled iron core pieces, each piled iron core pieces being blanked from at least two piled sheet materials and sequentially laminated on other piled iron core pieces, wherein the piled iron core pieces adjacent in a direction of lamination are interlocked together by a plurality of caulking parts provided in each piled iron core pieces. Each of the plurality of caulking parts includes a caulking protrusion formed in one side and a caulking fitting groove formed in the other side to which the caulking protrusion is fitted, and the caulking protrusion is allowed to protrude to the caulking fitting groove of the piled iron core pieces adjacent thereto in the direction of lamination, and a width of the caulking protrusion is larger than an inner width of the caulking fitting groove.

A wound core with low transformer iron loss and good magnetic characteristics without using two or more types of materials with different magnetic characteristics. The wound core includes a grain-oriented electrical steel sheet as a material and has a flat surface portion, a corner portion adjacent to the flat surface portion, a lap portion in the flat surface portion, and a bent portion in the corner portion, and the ratio of the length of the outer circumference to the length of the inner circumference (the length of the outer circumference/the length of the inner circumference) is 1.70 or less when viewed from the side, and the grain-oriented electrical steel sheet has a magnetic flux density B8 in the range of 1.92 T to 1.98 T at a magnetic field strength H of 800 A/m and has a specified iron loss deterioration rate of 1.30 or less under harmonic superposition.

A manufacturing method of a grain-oriented electrical steel sheet according to an embodiment of the present invention includes: manufacturing a cold-rolled sheet; forming a groove in the cold-rolled sheet; removing an FeO oxide formed on a surface of the cold-rolled sheet; primary recrystallization annealing the cold-rolled sheet; and applying an annealing separating agent to the primary recrystallized cold-rolled sheet, and secondary recrystallization annealing it, wherein a close contacting property coefficient calculated by Formula 1 below is 0.016 to 1.13.
close contacting property coefficient (S.sub.ad)=(0.8?R)/H.sub.hill-up[Formula 1] (In Formula 1, R represents the average roughness (?m) of the surface of the cold-rolled sheet after the removing of the oxide, and H.sub.hill-up represents the average height (?m) of the hill-up present on the surface of the cold-rolled sheet after the removing of the oxide.).