Method of cutting grooves in hydrodynamic bearing made of cerami

Details Method of cutting grooves in hydrodynamic bearing made of cerami Method of cutting grooves in hydrodynamic bearing made of cerami

1991-12-02

1993-03-30

Albritton, C. L.

Electric heating

Metal heating

By arc

21912166, B23K 2600

Patent

active

051986370

ABSTRACT:
A ceramic hydrodynamic bearing used as a radial or a thrust bearing in a spindle motor for a hard disk driver. The bearing includes a ceramic bearing base having hydrodynamic pressure generating grooves. A sliding surface of the bearing base is irradiated with an energy beam with a high energy density to remove said material, thereby forming hydrodynamic pressure generating groove, and at the same time the grooves are coated with a modification layer that is formed by melting the ceramic material that constitutes said ceramic bearing base with the energy beam and by solidifying said ceramic bearing base.

REFERENCES:
patent: 5054938 (1991-10-01), Ide
patent: 5102237 (1992-04-01), Ide
patent: 5137373 (1992-08-01), Ide

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