Patent 8973264 was granted and assigned to United Technologies on March, 2015 by the United States Patent and Trademark Office.
A method of manufacturing a turbine disk involves machining to an initial form a slot in a turbine disk using a firm cutting tool. An intermediate form is then machined using a second cutting tool different from the first cutting tool. A final form using a third cutting tool different from the first cutting tool and the second cutting tool is then machined.