Patent ID: 8286331
Filing Date: 2012-10-16
Classification: H02K,Y10T

Abstract:
1. A method for manufacturing a laminated core, comprising: a first step of forming rotor core sheets and stator core sheets from a thin strip material, each of the stator core sheets being positioned so as to have a common axis with each of the rotor core sheets, each of the stator core sheets including a ring-shaped yoke piece and a plurality of magnetic pole pieces, the magnetic pole pieces integrally extending from a radially inside of the yoke piece, each of the magnetic pole pieces including a magnetic pole shaft piece and a magnetic pole tooth piece; and a second step of laminating the stator core sheets inside a die, wherein the first step comprises the steps of: with reference to the second pilot holes, shaping the magnetic pole tooth pieces from the preparatory magnetic tooth pole pieces.