Patent ID: 7103961

Claim:
A method of manufacturing a laminated core, the method comprising the steps of: punching a plurality of core pieces from thin sheet material; forming caulking through-holes in the plurality of core pieces; laminating the plurality of core pieces to define a core component having a top and bottom and so that the caulking through-holes in the plurality of core pieces are aligned at one location, fully through the core component; inserting a first rod shaped material into the caulking through-holes of the core pieces at the first location by movement of the first rod shaped material in a first direction from the top/bottom of the core component fully to and through the bottom/top of the core component; and after inserting the first rod shaped material, pushing back the inserted first rod shaped material by movement of the rod shaped material through the caulking through-holes in a direction, with no forces being applied to either end of the rod in the first direction so as to deform the rod, opposite to the first direction to thereby enhance connection between the first rod shaped material and core pieces and thereby form the laminated core.