Method of improving lamination stack flatness and concentricity

A method of forming a stack of laminates for a stator, comprising:

• stamping in sequence a plurality of annular stator laminates from a continuous sheet of metal, the annular stator laminates each including an interior surface with a plurality of winding teeth and an exterior surface with a plurality of circumferentially spaced radially protruding ears, wherein the plurality of circumferentially spaced radially protruding ears of each annular stator laminate is circumferentially offset from the circumferentially spaced radially protruding ears of immediately adjacent annular stator laminates;
• and
• clocking each of the annular stator laminates a predetermined angular rotation relative to an adjacent annular stator laminate and stacking the annular stator laminates with the circumferentially spaced radially protruding ears aligned within the stack.

A method of forming a stack of laminates for a stator, comprising:

• stamping in sequence a plurality of annular stator laminates from a continuous sheet of metal, the annular stator laminates each including an interior surface with a plurality of winding teeth and an exterior surface with a plurality of circumferentially spaced radially protruding ears, wherein the plurality of circumferentially spaced radially protruding ears of each annular stator laminate is circumferentially offset from the circumferentially spaced radially protruding ears of immediately adjacent annular stator laminates;
• and
• clocking each of the annular stator laminates a predetermined angular rotation relative to an adjacent annular stator laminate and stacking the annular stator laminates with the circumferentially spaced radially protruding ears aligned within the stack, wherein a segmented blank/punch is used to blank the ears progressively at multiple locations on the perimeter of the stack of laminates.