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Method of fabricating rotor assemblies having chemically bonded lamination stacks

  • US 7,788,792 B2
  • Filed: 12/12/2006
  • Issued: 09/07/2010
  • Est. Priority Date: 10/16/1997
  • Status: Expired due to Fees
First Claim
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1. A method of fabricating a rotor assembly, comprising:

  • polishing a plurality of laminations of magnetic material;

    removing carbon and impurities while annealing each of the polished laminations in a carbon removing atmosphere;

    applying a metallic plating to the annealed laminations;

    oxidizing the plated laminations by heating each of the plated laminations while exposed to air;

    applying a dielectric chemical bonding agent to the surfaces of the oxidized laminations;

    stacking the laminations;

    applying the chemical bonding agent to spacers;

    stacking the spacers at the end of the stacked laminations; and

    applying a thermal cycle to the stacked laminations and spacers to cure the chemical bonding agent such that the laminations maintain a bond in operating temperatures over 1000°

    F.

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