Method for producing laminated iron cores

Details Method for producing laminated iron cores Method for producing laminated iron cores

1994-06-16

1996-07-30

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29596, 310 42, 310216, H02K 1502

Patent

active

055399746

ABSTRACT:
A method for producing laminated iron cores, in which at least one of a semi-stator sheet piece and a semi-rotor sheet piece is subjected to a pressing operation in a sheet thickness direction to be extended inwardly radially and outwardly radially and to make large a blanking width, so that, when the semi-stator sheet piece is subjected at its inner peripheral edge portion to a blanking operation and the semi-rotor sheet piece is subjected at its outer peripheral edge portion to a blanking operation, generation of `scum riser` phenomenon or the like can be prevented in advance.

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