Method for CBN tipping of HPC integrally bladed rotors

Details Method for CBN tipping of HPC integrally bladed rotors Method for CBN tipping of HPC integrally bladed rotors

1993-10-15

1996-01-23

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating contains embedded solid material

205122, 205128, 205136, C25D 502

Patent

active

054862817

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 on the tips of the workpieces. The mechanical masking device protects portions of the array from 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: 4082640 (1978-04-01), Haack
patent: 4155721 (1979-05-01), Fletcher
patent: 4169020 (1979-09-01), Stalker et al.
patent: 4608128 (1986-08-01), Farmer et al.
patent: 4627896 (1986-12-01), Nazmy et al.
patent: 4789441 (1988-12-01), Foster et al.
patent: 5074970 (1991-12-01), Routsis et al.
patent: 5076897 (1991-12-01), Wride et al.
patent: 5312540 (1994-05-01), Kurono et al.

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