Patent ID: 9539799
Date: 2017-01-10
CPC Classifications: B21D,B32B,H02K,Y10T

Claim:
1. A laminated core manufacturing method for performing rotational lamination by conveying a band-shaped material to be stamped to a die apparatus to successively perform presswork, stamping out and dropping of one or more core pieces into a blanking die and rotating the blanking die by a predetermined angle, the method comprising: disposing a positioning mechanism for the blanking die inward from both ends in a width direction of the band-shaped material to be stamped, the positioning mechanism including rotational lamination guide pins and rotational lamination guide holes; providing the band-shaped material to be stamped with temporary holes; and inserting the rotational lamination guide pins through respective temporary holes provided in the band-shaped material to be stamped and into the rotational lamination guide holes to perform positioning of the blanking die in a rotation direction, the rotational lamination guide pins being loosely fitted in the temporary holes.