Method of making frame and magnet assembly for a dynamoelectric

Details Method of making frame and magnet assembly for a dynamoelectric Method of making frame and magnet assembly for a dynamoelectric

1993-09-20

1994-10-11

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

2281732, 2281734, 310 42, 310 89, 310154, H02K 1514

Patent

active

053534913

ABSTRACT:
A method of securing a tubular metallic magnet retainer to a tubular metallic frame of a dynamoelectric machine, the tubular frame having an annular internal surface, the steps comprising, forming an annular end surface at an end of said tubular frame that is located at an angle to said annular internal surface of said frame, an intersection of said annular end surface and said internal annular surface of said frame forming an annular first ridge, inserting said magnet retainer into said tubular frame, bending an annular end portion of said magnet retainer into engagement with said annular surface on said frame to thereby form a second annular ridge on said magnet retainer that is aligned with said first annular ridge, moving a welding electrode that has an annular tapered surface into engagement with said second ridge, a shape of said tapered surface on said welding electrode being such that there is annular line contact between a portion of said tapered surface on said welding electrode and said second ridge, and causing a welding current to flow through said electrode and through said first and second ridges to cause an annular imperforate weld to be developed between said first and second ridges.

REFERENCES:
patent: 3772546 (1973-11-01), Means
patent: 3789250 (1974-01-01), Macoit
patent: 3790830 (1974-02-01), Bonfiglio
patent: 4587449 (1986-05-01), West
patent: 4769624 (1988-09-01), Merritt et al.
patent: 5105114 (1992-04-01), Sickle et al.

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