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A method for making a core for one of a rotor and a stator for use in an electric motor, the core being formed from a plurality of laminations, includes forming a predetermined number of through-material slots in a first portion of a material stock, forming at least one angled interlocking projectio

A method for making a core for one of a rotor and a stator for use in an electric motor, the core being formed from a plurality of laminations, includes forming a predetermined number of through-material slots in a first portion of a material stock, forming at least one angled interlocking projection in the material stock, the projection having a circumferential length and being formed so that at least a portion of the projection remains integral with the material stock, cutting the material stock to define a receiving opening corresponding to the interlocking projection, the receiving opening positioned relative to the projection at an angle .phi. that is a whole number multiple of .beta., where .beta. is an angle defined as a ratio of 360 degrees to the number of slots and cutting the material stock to form a first substantially circular lamination. Second and third laminations are formed in kind. The second lamination is rotated relative to the first lamination and positioned on the first lamination such that the projection from the first lamination engages the receiving opening in the second lamination. The third lamination is positioned on and rotated relative to the second lamination in kind to form the core.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for making a core for one of a rotor and a stator for use in an electric motor, the core being formed from a plurality of laminations comprising the steps of:forming a predetermined number of through-material slots in a first portion of a material stock;forming

[ What is claimed is:] [1.]1. A method for making a core for one of a rotor and a stator for use in an electric motor, the core being formed from a plurality of laminations comprising the steps of:forming a predetermined number of through-material slots in a first portion of a material stock;forming at least one angled interlocking projection in said material stock, said projection having a circumferential length and being formed so that at least a portion of said projection remains integral with said material stock and a portion of said projection extends transverse to said material stock;cutting said material stock in at least one portion of said material stock to define a receiving opening corresponding to said interlocking projection, said receiving opening having a circumferential length and being positioned relative to said projection at an angle .phi. that is a whole number multiple of .beta., where .beta. is an angle defined as a ratio of 360 degrees to the number of slots;cutting said material stock to form a first substantially circular lamination;forming at least one angled interlocking projection in a second portion of said material stock, said projection having a circumferential length and being formed so that at least a portion of said projection remains integral with said material stock and a portion of said projection extends transverse to said material stock;cutting said material stock to define a receiving opening corresponding to said interlocking projection, said receiving opening having a circumferential length and being positioned relative to said projection at an angle .phi. that is a whole number multiple of .beta., where .beta. is an angle defined as a ratio of 360 degrees to the number of slots;cutting said material stock to form a second substantially circular lamination;rotating said second lamination relative to said first lamination;positioning said second lamination on said first lamination such that said projection from said first lamination engages said receiving opening in said second lamination to form said core;forming at least one angled interlocking projection in a third portion of said material stock, said projection having a circumferential length and being formed so that at least a portion of said projection remains integral with said material stock and a portion of said projection extends transverse to said material stock;cutting said material stock to define a receiving opening corresponding to said interlocking projection, said receiving opening having a circumferential length and being positioned relative to said projection at an angle .phi. that is a whole number multiple of .beta., where .beta. is an angle defined as a ratio of 360 degrees to the number of slots;cutting said material stock to form a third substantially circular lamination;rotating said third lamination relative to said second lamination; andpositioning said third lamination on said second lamination such that said projection from said second lamination engages said receiving opening in said third lamination to form said core.