| 摘要 |
A method of manufacture of a magnetic rotor core member for a rotating-field dynamoelectric machine, particularly a small alternator, including the steps of: hot forging a segment of steel bar stock into a core blank approximating the external configuration desired for the rotor core member; de-burring the core blank; coining the core blank into closer conformation to the desired core member configuration; cooling the core blank; cold punching a shaft aperture through the central part of the core blank and simultaneously cold-compressing the core blank into closer conformity with the required dimensions for the finished rotor (or rough machining of a shaft aperture and rough machining of some elements of the blank); and, finally, cold-compressing the core blank to finished form as a rotor core member.
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