Patent ID: 8136229
Filing Date: 2012-03-20
Classification: B21D,H01F,H02K,Y10T

Abstract:
1. A method of producing a variant-shaped laminated core by punching out core sheets of plural different types as regards at least one of outer shape and size from a strip to be processed, and by laminating and interlocking the plural types of core sheets, the method comprising: Step A of punching out a required number of core sheets for each of the plural types from the strip being transferred, to form the outlines of the core sheets, and push back the punched out core sheets into the strip; Step B of forming at least two opposed cutouts, the cutouts reaching an outer periphery of each of outer plates, the outer plates being the same in outer shape and respectively containing thereinside the core sheets, the cutouts each having inner edges reaching each of the core sheets; Step C of forming caulking portions for interlocking in each of the core sheets; Step D of punching out the outer plates from the strip to form the outlines of the outer plates and laminating and interlocking the core sheets to form the variant-shaped laminated core; and Step E of removing the outer plates located outside the laminated and interlocked variant-shaped core.