Method for making stators for dynamoelectric machines

Details Method for making stators for dynamoelectric machines Method for making stators for dynamoelectric machines

1977-09-21

1980-02-19

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29 90R, 72363, H02K 1502

Patent

active

041887123

ABSTRACT:
A method which involves aligning a stack of a plurality of loose laminations so that clamp bolt holes therein are held in an accurately aligned condition while the stack is compressed (in the vicinity of the bolt holes) between pads that simulate mounting pads in a compressor, and a means for applying a force localized in the bolt hole regions. The compressive forces are preselected to simulate and closely approximate the compressive forces that ultimately will be applied to the bolt hole regions under the heads of mounting bolts in a compressor. Since the stack is initially aligned before the compressive forces are applied and while the laminations are free to shift relative to one another, the various eccentricities and dimensional variations between the bore and bolt holes are transferred to the bore. Then, while the stack is held with the preselected compressive forces, the bore is shaped to be concentric relative to the bolt holes. One means that may be used to shape the bore is a tool known in the motor manufacturing art as a roller burnishing tool.

REFERENCES:
patent: 2304607 (1942-12-01), Sleeter
patent: 2819417 (1958-01-01), Glass
patent: 3299304 (1967-01-01), Hull
patent: 3464107 (1969-09-01), Geisenhaver
patent: 3493794 (1970-02-01), Hickle

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