General Electric Company
METHODS AND APPARATUS FOR FORMING AN APERTURE IN A COMPOSITE COMPONENT

Abstract:

Methods and apparatus for forming an aperture in a composite component are provided. For example, a method for forming an aperture in a ceramic matrix composite (CMC) component comprises, based on a final dimension of the aperture, selecting a tool having a tool size and a cutting surface; selecting an angle at which to cut the component with the tool; cutting a back surface of the component with the tool, the cutting surface positioned at the angle; repositioning the tool relative to the component; and cutting the aperture through to its final dimension. The tool may be a core drill with a diameter within a range of 60% to 90% of the aperture final dimension. The angle may be within a range of 10.degree. to 60.degree. with respect to the back surface. The aperture may be cut through to its final dimension from a front surface of the component.