Method and apparatus for forming grooves within journals and...

Details Method and apparatus for forming grooves within journals and... Method and apparatus for forming grooves within journals and...

2006-12-05

2006-12-05

King, Roy (Department: 1742)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S280000, C205S652000, C205S653000, C205S654000, C205S668000, C205S672000

Reexamination Certificate

active

07144482

ABSTRACT:
An apparatus, method and means is provided for electrochemical machining of hydrodynamic bearing assemblies in spindle motors. In an aspect, a cartridge is provided that receives and accurately positions an electrode in three dimensions in a near frictionless manner. The electrode reaches and maintains an equilibrium position in response to a first and second predetermined force, the equilibrium position being a predetermined three dimensional orientation relative to the work piece and defining a critical orifice with the work piece. In an aspect, a hydrostatic bearing is employed within the electrode for radially adjusting the electrode.

REFERENCES:
patent: 5718145 (1998-02-01), Grabbe
patent: 6764590 (2004-07-01), Cochran
patent: 2002/0074222 (2002-06-01), Cochran
patent: 2003/0221959 (2003-12-01), Cochran

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