Patent ID: 9017506
Filing Date: 2015-04-28
Classification: B21D,B32B,H02K,Y10T

Abstract:
1. A method for manufacturing a core of a rotating electrical machine, wherein the core is formed by laminating core plates made of a plurality of core pieces, the method comprising: intermittently conveying a workpiece along a length of the workpiece; punching out side edges of a core piece while the workpiece is in a stopped state and, at a downstream position in a conveying direction of the workpiece, cutting remaining edges of the core piece to punch out the core piece, for each of the core pieces; forming on each of the core pieces a yoke portion having a pair of sides and a tooth portion; forming a projection on one of the sides of the yoke portion; laminating the projection of one of the core pieces onto the projection of another of the core pieces that is adjacent in the laminating direction; and laminating the core pieces while lining up the punched out core pieces in a circumferential direction of a core plate to form the core plate.