Laminated core, rotor, and manufacturing method of laminated core
AssigneeNippon Steel Corporation
InventorTakashi ARAMAKI
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Abstract
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.
Claims1
A manufacturing method of a laminated core being integrally formed by laminating a plurality of steel sheets including a first steel sheet and a second steel sheet, the first steel sheet being disposed as an outermost layer on one end side along a central axis and including a first exposed surface, the second steel sheet being disposed as an outermost layer on the other end side along the central axis and including a second exposed surface, the manufacturing method comprising:
- a resin coating step of coating the plurality of steel sheets with an adhesive resin;
- a laminating step of forming a laminated body by laminating the plurality of steel sheets;
- and
- a pressurizing and heating step of pressurizing and heating the laminated body,
- wherein the pressurizing and heating step includes controlling a rise temperature, and 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 at the rise temperature being controlled.
Dependencies are inferred from the claim text.