Patent ID: 8042256
Filing Date: 2011-10-25
Classification: B21D,H02K,Y10T

Abstract:
1. A dynamoelectric stator manufacturing method for manufacturing a dynamoelectric stator that has: a cylindrical stator core that is prepared by laminating a thin magnetic plate, and in which a plurality of slots that open on an inner circumferential side are formed so as to line up in a circumferential direction; and a stator winding that is installed in said stator core, said dynamoelectric stator manufacturing method comprising steps of: preparing a cylindrical stator core by consolidating and integrating said laminated thin magnetic plate by welding said laminated thin magnetic plate so as to extend from a first end portion to a second end portion in a direction of lamination; holding said stator core in a holding apparatus by pressing an inner circumferential surface of said cylindrical stator core radially outward using a curved surface that has a shape that is formed by dividing a cylindrical surface into a plurality of sections circumferentially; and shaping two axial end portions of an outer circumferential surface of said stator core by pressing shaping rollers that are rotatable around axes of rotation that are parallel to a central axis of said cylindrical surface onto said two axial end portions of said outer circumferential surface of said stator core while rotating said holding apparatus around said central axis of said cylindrical surface with said stator core in a held state.