Patent ID: 9520761
Filing Date: 2016-12-13
CPC Classification: B21D,H02K,Y10T

Claim Text:
1. A production method for a laminated iron core, the production method comprising: a mounting process that a plurality of segment iron core pieces which respectively have caulking parts and n pieces of magnetic pole parts formed at a pitch angle of θ° and respectively have circular arc angles obtained by dividing 360° as an angle of circumference into m are separated from a belt shaped iron core material and mounted on a mount base; a carrying process that the segment iron core pieces mounted on the mount base are carried one piece by one piece to a designated position in a rotary laminating mechanism by a pusher; a first rotating process that the rotary laminating mechanism including the segment iron core piece therein is rotated by 360°/m; a forming process that the mounting process, the carrying process and the first rotating process are repeated m times to form an annularly connected iron core piece in which m pieces of the segment iron core pieces are annularly arranged; and a caulking and laminating process that during the forming process, the caulking part of the segment iron core piece is caulked to laminate the segment iron core piece on the segment iron core piece adjacent in a direction of lamination, wherein the forming process is repeated to form a caulked and laminated iron core having a prescribed thickness, where m and n are integers of 2 or larger, and θ·n·m=360°.