Method for producing drilled cooling holes in a gas turbine engine component

A method for producing geometrical-parameterized drilled holes in a wall of a component, the method comprising the following steps:

• A) providing ideal data of the drilled holes of the component, which originate from an ideal model;
• B) establishing an actual model of the component;
• C) determining a displacement of the component caused by a manufacturing process of the component;
• D) decoupling the displacement determined in step C into deformation characteristics comprising torsion, bending and shrinkage;
• E) determining a deformation of the component caused by clamping of the component and a positional error generated before machining the drilled holes;
• F) determining a deviation of the component induced by component movement of the component and a deviation of the component induced by component displacement of the component during a machining process, wherein determining the deviation of the component induced by component movement of the component and the deviation of the component induced by component displacement of the component comprises modeling the deviations during machining process by performing a finite element analysis based on time-discrete modeling code;
• G) correcting geometrical and positional values of the drilled holes with consideration of the displacement established in step D, the deformation established in step E, the deviation of the component induced by component movement of the component established in step F and the deviation of the component induced by component displacement of the component established in step F;
• and
• H) producing the drilled holes in the wall of the component according to the geometrical and positional values after the geometrical and positional values are corrected at step G.

A method for producing geometrical-parameterized drilled holes in a wall of a component, the method comprising the following steps:

• A) providing ideal data of the drilled holes of the component, which originate from an ideal model;
• B) establishing an actual model of the component;
• C) determining a displacement of the component caused by a manufacturing process of the component;
• D) decoupling the displacement determined in step C into deformation characteristics comprising torsion, bending and shrinkage;
• E) determining a deformation of the component caused by clamping of the component and a positional error generated before machining the drilled holes, wherein step E comprises clamping the component using a fixture system based on a 3-2-1 locating principle with 6 locators and when the component is a blade of a gas turbine, clamping the component comprises clamping 1 locator on a blade platform, 2 locators on a pressure side of the blade, and 3 locators on a suction side of the blade;
• F) determining a deviation of the component induced by component movement of the component and a deviation of the component induced by component displacement of the component during a machining process;
• G) correcting geometrical and positional values of the drilled holes with consideration of the displacement established in step D, the deformation established in step E, the deviation of the component induced by component movement of the component established in step F and the deviation of the component induced by component displacement of the component established in step F;
• and
• H) producing the drilled holes in the wall of the component according to the geometrical and positional values after the geometrical and positional values are corrected at step G.