Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1983-06-07
1985-04-23
Whitehead, Harold D.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51 49, 51105R, 291568B, 29404, B24B 100
Patent
active
045121150
ABSTRACT:
Blade tips of a turbine rotor assembly are ground to precision dimensions of .+-.0.025 mm (.+-.0.001 inch) when the assembly is rotated at high speed during grinding. The speed should be sufficient to produce on the blades a radial acceleration of at least 700 times the force of gravity (6,900 m/s.sup.2). For compressor rotors the direction of rotation should be such that the blades move toward their concave side, and the speed should be sufficient to produce an axial flow. High resultant tip velocities are compensated for when dry grinding titanium alloys by moving the grinding media in the same direction as the tangential velocity at the point of contact. Burrs are eliminated by feeding at a very slow rate, of the order of 0.0004 mm/s when the final dimension is approached.
REFERENCES:
patent: 2730794 (1956-01-01), Schorner
patent: 2795900 (1957-06-01), Modler
patent: 3673897 (1972-07-01), Gassner
patent: 4074104 (1978-02-01), Fulkerson
General Electric Extract from Shop Manual "Assembly 72-31-00 Jun. 1/77" pp. 548-551.
General Electric Extract from GEK 50355 "The CF6 Engine Compressor Rotor EROM Fixture Manual" Mar. 1, 1978, Introduction pp. 1, 2; Section 1-1, pp. 1, 2 Mar. 1978.
Nessler C. G.
United Technologies Corporation
Whitehead Harold D.
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