METHOD AND ASSEMBLY FOR INSPECTING ENGINE COMPONENT
One exemplary embodiment of this disclosure relates to a method of inspecting a component of a gas turbine engine. The method includes performing a through-hole inspection, and determining a location of the plurality of holes from results of the through-hole inspection.
1 . A method of inspecting a component of a gas turbine engine, comprising:
performing a through-hole inspection; and
determining a location of the plurality of holes from results of the through-hole inspection.
2 . The method as recited in claim 1 , wherein the through-hole inspection includes a flow thermography process.
3 . The method as recited in claim 2 , wherein the flow thermography process includes providing a flow of fluid within the component and taking a thermal image of the plurality of holes as the fluid exits the plurality of holes.
4 . The method as recited in claim 3 , wherein taking the thermal image includes taking a thermal video of the fluid exiting the plurality of holes.
5 . The method as recited in claim 1 , wherein the results of the through-hole inspection include a plurality pixels, and wherein a blockage is identified when a number of pixels within an acceptable hole location is below a minimum threshold.
6 . The method as recited in claim 5 , wherein a hole is determined to not be blocked if a number of pixels is greater than or equal to a minimum threshold within the acceptable hole location.
7 . The method as recited in claim 1 , wherein a misaligned hole is identified if the determined hole location is outside an acceptable hole location.
8 . The method as recited in claim 7 , wherein the results of the through-hole inspection include a plurality of sets of pixels, each of the sets of pixels corresponding to one of the plurality of holes.
9 . The method as recited in claim 8 , wherein the determined location of each of the plurality of holes is a centroid of a corresponding one of the plurality of sets of pixels.
10 . The method as recited in claim 8 , wherein the determined location of each of the plurality of holes is a pixel on a perimeter of a corresponding one of the plurality of sets of pixels.
11 . The method as recited in claim 7 , wherein the determined location of the plurality of holes is expressed relative to secondary datums.
12 . The method as recited in claim 11 , wherein the determined location of the plurality of holes is translated from being expressed in terms of secondary datums to being expressed in terms of primary datums.
13 . The method as recited in claim 12 , wherein the component is an airfoil including an airfoil section and a root, the secondary datums located on the root, and the primary datums located on the airfoil section.
14 . An inspection assembly, comprising:
a thermal imaging camera;
a fixture for supporting an engine component;
a fluid source in communication with a passageway of the engine component; and
a controller configured to perform a through-hole inspection on the component, and configured to determine a location of the plurality of holes from results of the through-hole inspection.
15 . The assembly as recited in claim 14 , including a conduit connecting the fluid source to the passageway.
16 . The assembly as recited in claim 14 , wherein the controller is configured to identify blocked and partially blocked holes by comparing a number of pixels within an acceptable hole location with a minimum threshold.
17 . The assembly as recited in claim 14 , wherein the controller compares the determined hole locations for each of the plurality of holes with acceptable hole locations to identify misaligned holes.
18 . The assembly as recited in claim 14 , wherein the controller is in communication with a model, the model including a minimum pixel threshold and acceptable hole locations.
19 . The assembly as recited in claim 14 , wherein the fixture supports the engine component at a root of the engine component.