This laminated core is formed integrally by laminating a plurality of steel sheets including a first steel sheet and a second steel sheet. The first steel sheet is disposed as an outermost layer on one end side along the central axis and including a first exposed surface. The second steel sheet is disposed as an outermost layer on the other end side along the central axis and including a second exposed surface. In this laminated core, a difference between a maximum value and a minimum value in a distribution of a thickness that is a distance between the first exposed surface and the second exposed surface is 0.25 mm or less.

This laminated core is formed integrally by laminating a plurality of steel sheets including a first steel sheet and a second steel sheet. The first steel sheet is disposed as an outermost layer on one end side along the central axis and including a first exposed surface. The second steel sheet is disposed as an outermost layer on the other end side along the central axis and including a second exposed surface. In this laminated core, a difference between a maximum value and a minimum value in a distribution of a thickness that is a distance between the first exposed surface and the second exposed surface is 0.25 mm or less.

The present invention provides: a laminated magnetic material for a motor, the material having low core loss characteristics even in a high-frequency band; and a method for manufacturing said laminated magnetic material for a motor. Provided is a laminated magnetic material provided with a plurality of quenched alloy strips and a resin layer made of resin and disposed between the quenched alloy strips. The laminated magnetic material is characterized in that the adhesive stress [MPa] represented by the following equation is 1.8 MPa or greater when the modulus of elasticity of the resin at room temperature is denoted by [MPa], the coefficient of linear expansion of the resin at room temperature is denoted by 1 [1/K], the curing temperature of the resin is denoted by Ta [K], the coefficient of linear contraction of the resin during curing is denoted by , the thickness of the resin is denoted by h1 [m], the thickness of the quenched alloy strips is denoted by h2 [m], the coefficient of linear expansion of the quenched alloy strips is denoted by 2 [1/K], and room temperature is denoted by RT. =h1/h2{(12)(TaRT)+}.

The present invention provides: a laminated magnetic material for a motor, the material having low core loss characteristics even in a high-frequency band; and a method for manufacturing said laminated magnetic material for a motor. Provided is a laminated magnetic material provided with a plurality of quenched alloy strips and a resin layer made of resin and disposed between the quenched alloy strips. The laminated magnetic material is characterized in that the adhesive stress [MPa] represented by the following equation is 1.8 MPa or greater when the modulus of elasticity of the resin at room temperature is denoted by [MPa], the coefficient of linear expansion of the resin at room temperature is denoted by 1 [1/K], the curing temperature of the resin is denoted by Ta [K], the coefficient of linear contraction of the resin during curing is denoted by , the thickness of the resin is denoted by h1 [m], the thickness of the quenched alloy strips is denoted by h2 [m], the coefficient of linear expansion of the quenched alloy strips is denoted by 2 [1/K], and room temperature is denoted by RT. =h1/h2{(12)(TaRT)+}.

The invention relates to a method for stamping and forming packs of sheet metal laminations coated with a bonding varnish to form lamination packs, wherein a brake sleeve is provided in which the sheet metal laminations of the lamination packs, lying on top of one another and with outer edges resting against the inside of the brake sleeve, are acted on with heat from the brake sleeve via the outer edges of the sheet metal laminations so that the bonding varnish is thermally activated, bonding the laminations to one another, characterized in that an additional device for heating the lamination packs is at least temporarily positioned in an axial channel formed by the lamination packs in order to additionally heat the lamination packs.

The invention relates to a method for stamping and forming packs of sheet metal laminations coated with a bonding varnish to form lamination packs, wherein a brake sleeve is provided in which the sheet metal laminations of the lamination packs, lying on top of one another and with outer edges resting against the inside of the brake sleeve, are acted on with heat from the brake sleeve via the outer edges of the sheet metal laminations so that the bonding varnish is thermally activated, bonding the laminations to one another, characterized in that an additional device for heating the lamination packs is at least temporarily positioned in an axial channel formed by the lamination packs in order to additionally heat the lamination packs.

A manufacturing method of a laminated iron core includes: a step of pressing, with a die (2), an electrical steel sheet having a coating containing an adhesive that exhibits adhesive ability through heating, provided to a sheet surface thereof, to obtain a unit iron core (1); and a step of laminating the unit iron cores (1) pressed with the die (2), and heating the sheet surface of the unit iron core (1) of an uppermost layer at a plurality of partial regions to make the unit iron core (1) of the uppermost layer to be partially adhered to the unit iron core (1) of a lower layer thereof at a plurality of regions. As above, by performing the presswork and the lamination substantially simultaneously as a series of operation, it is possible to increase the efficiency of manufacture of the laminated iron core without increasing the man-hour.

A manufacturing method of a laminated iron core includes: a step of pressing, with a die (2), an electrical steel sheet having a coating containing an adhesive that exhibits adhesive ability through heating, provided to a sheet surface thereof, to obtain a unit iron core (1); and a step of laminating the unit iron cores (1) pressed with the die (2), and heating the sheet surface of the unit iron core (1) of an uppermost layer at a plurality of partial regions to make the unit iron core (1) of the uppermost layer to be partially adhered to the unit iron core (1) of a lower layer thereof at a plurality of regions. As above, by performing the presswork and the lamination substantially simultaneously as a series of operation, it is possible to increase the efficiency of manufacture of the laminated iron core without increasing the man-hour.

A laminated body manufacturing device, includes a supply mechanism configured to supply a plurality of plate-shaped core pieces including locking core pieces, which have locking pieces at a plurality of positions at outer peripheral surfaces thereof, and non-locking core pieces that do not have the locking pieces; a receiving member configured to receive a plurality of the core pieces supplied from the supply mechanism; and an isolation mechanism disposed between the supply mechanism and the receiving member in a conveying direction of the core pieces, and controlling supply of the core pieces to the receiving member, wherein the isolation mechanism has locking portions that can move between locking positions, at which the locking portions respectively lock the plurality of locking pieces of the locking core pieces supplied from the supply mechanism, and non-locking positions at which the locking portions do not lock the respective locking pieces.

A laminated body manufacturing device, includes a supply mechanism configured to supply a plurality of plate-shaped core pieces including locking core pieces, which have locking pieces at a plurality of positions at outer peripheral surfaces thereof, and non-locking core pieces that do not have the locking pieces; a receiving member configured to receive a plurality of the core pieces supplied from the supply mechanism; and an isolation mechanism disposed between the supply mechanism and the receiving member in a conveying direction of the core pieces, and controlling supply of the core pieces to the receiving member, wherein the isolation mechanism has locking portions that can move between locking positions, at which the locking portions respectively lock the plurality of locking pieces of the locking core pieces supplied from the supply mechanism, and non-locking positions at which the locking portions do not lock the respective locking pieces.