Method for manufacturing a stator for an ultrasonic motor

Details Method for manufacturing a stator for an ultrasonic motor Method for manufacturing a stator for an ultrasonic motor

1994-05-17

1995-12-05

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 26, 419 28, 419 39, 310323, 310328, B22F 300, B22F 312, B22F 510

Patent

active

054726620

ABSTRACT:
A method for manufacturing a stator for an ultrasonic motor, wherein the stator includes a circular land portion, a plurality of teeth secured to the land portion by a plurality of radial slits, the method comprising the steps of: compressing fine metal particle to form a pre-compression body having a predetermined shape, whereby said pre-compression body is provided with a plurality of projections for forming a plurality of teeth of the stator; baking said pre-compression body, for producing a sintered body; applying a densification process on the teeth of said sintered body produced in said baking step, whereby each of said teeth is provided with a high dense portion having a density ratio of at least 90%; and applying a sizing process to said sintered body produced in said baking step.

REFERENCES:
patent: 3848312 (1974-11-01), Kirkham
patent: 3888663 (1975-06-01), Reichman
patent: 4054449 (1977-10-01), Dunn et al.
patent: 4063940 (1977-12-01), Dain et al.
patent: 4580073 (1986-04-01), Okamura et al.
patent: 5080712 (1992-01-01), James et al.
patent: 5187406 (1993-02-01), Seki

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