Apparatus for abrasive tipping of integrally bladed rotors

Details Apparatus for abrasive tipping of integrally bladed rotors Apparatus for abrasive tipping of integrally bladed rotors

1995-09-15

1997-03-04

Bell, Bruce F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204297R, 118500, 118505, C25D 502, C25D 1706

Patent

active

056075618

ABSTRACT:
The present invention relates to a method and apparatus for forming abrasive surfaces on the tips of a plurality of workpieces such as the tips of gas turbine airfoil blades. The method broadly comprises the steps of providing a mechanical masking device having a plurality of openings arranged around the circumference of the device, installing an array containing a plurality of workpieces to be coated within the mechanical masking device so that portions of the workpieces including the tips thereof extend through the openings, immersing the mechanical masking device with the installed array of workpieces in a tank containing a plating bath with a matrix material and an abrasive grit material in slurry form so that the workpieces lie in a substantially horizontal plane, and applying a current through the plating bath to form the abrasive surfaces of the tips of the workpieces. The mechanical masking device protects portions of the array form the coating operation. A barrier device is also used to confine the abrasive grit material within a desired space during the formation of the abrasive coating on the tip portions.

REFERENCES:
patent: 3904789 (1975-09-01), Speirs et al.
patent: 4312716 (1982-01-01), Maschler et al.
patent: 4530861 (1985-07-01), Sippel et al.
patent: 5074970 (1991-12-01), Routsis et al.
patent: 5076897 (1991-12-01), Wride et al.
patent: 5225246 (1993-06-01), Beers et al.
patent: 5312540 (1994-05-01), Kurono et al.

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