Patent ID: 8087154
Filing Date: 2012-01-03
Classification: H02K,Y10T

Abstract:
1. A method for manufacturing two plate-shaped end-plates specifically configured to be applied to a motor to sandwich a rotor of the motor and engage a rotatably supported shaft, the method for manufacturing each of the two plate-shaped end-plates comprising: fixing a pipe of non-magnetic material so the pipe does not move, the pipe possessing an original axial length in an axial direction of the pipe, the pipe also possessing a first axial end and an opposite second axial end; applying an axial force to the pipe of non-magnetic material, the first and second axial ends of the pipe each possessing an original outer diameter and an original inner diameter before the axial force is applied; and the axial force being applied to cause plastic deformation of the pipe, to reduce the axial length of the pipe from the original axial length to a reduced axial length less than the original axial length and to increase the original outer diameter of the first axial end of the pipe to an increased outer diameter greater than the original outer diameter of the first axial end to produce the plate-shape end-plate having a central through hole.