The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 1985
Filed:
Jun. 07, 1983
Robert J Miller, Vernon, CT (US);
United Technologies Corporation, Hartford, CT (US);
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.