Methods for repairing a gas turbine component
First Claim
Patent Images
1. A method for repairing a gas turbine component comprising:
- identifying on said gas turbine component a worn out location at which said gas turbine component is damaged;
removing said damaged location and creating a missing zone;
manufacturing an insert which fits into said missing zone, wherein the insert is pre-cast with built-in features;
putting said insert into said missing zone;
adjusting said insert in said gas turbine component;
joining said adjusted insert to said gas turbine component;
measuring the worn out location with a 3-D measuring system to determine the actual geometry of the missing zone;
wherein a nominal geometry for the insert is defined by said actual geometry of the missing zone by establishing a component-specific reference coordinate system using characteristic features of the damaged gas turbine component including predefined gap tolerances and user-defined reference marks;
wherein measuring the actual geometry of the insert comprises measuring during said manufacturing an insert;
comparing the nominal geometry and the actual geometry of the insert based on the component-specific reference coordinate system;
wherein manufacturing an insert comprises adaptive machining the insert based on said comparing;
wherein the built-in features of the insert are not needed for functionality of the insert in the repaired gas turbine component, the built-in features being configured and arranged to allow clamping during at least one of the putting, adjusting, and forming steps, and assisting during the adaptive machining operation; and
removing said built-in features not needed for functionality of the insert by machining after said joining.
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Abstract
A method for repairing a gas turbine component includes:
- identifying on the gas turbine component (10) a worn out location, where the gas turbine component (10) is damaged;
- removing the damaged location, thereby creating a missing zone (18);
- manufacturing an insert, which fits into the missing zone (18);
- putting the insert into the missing zone (18);
- adjusting the insert in the gas turbine component (10); and
- joining the adjusted insert to the gas turbine component (10).
A higher degree of precision and automation can be achieved, because
- the worn out location is measured/scanned with a 3-D scanning/measuring system (20) to get the actual geometry of the missing zone (18), especially as a CAD data;
- the nominal geometry for the insert is defined by the actual geometry of the worn out location, with respect to certain defined gap tolerances;
- the actual geometry of the insert is measured during the manufacture of the insert;
- the nominal geometry and the actual geometry of the insert are compared; and
- an adaptive machining operation of the insert is carried out based on the results from the comparison between the actual and nominal geometries of the insert.
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Citations
15 Claims
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1. A method for repairing a gas turbine component comprising:
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identifying on said gas turbine component a worn out location at which said gas turbine component is damaged; removing said damaged location and creating a missing zone; manufacturing an insert which fits into said missing zone, wherein the insert is pre-cast with built-in features; putting said insert into said missing zone; adjusting said insert in said gas turbine component; joining said adjusted insert to said gas turbine component; measuring the worn out location with a 3-D measuring system to determine the actual geometry of the missing zone; wherein a nominal geometry for the insert is defined by said actual geometry of the missing zone by establishing a component-specific reference coordinate system using characteristic features of the damaged gas turbine component including predefined gap tolerances and user-defined reference marks; wherein measuring the actual geometry of the insert comprises measuring during said manufacturing an insert; comparing the nominal geometry and the actual geometry of the insert based on the component-specific reference coordinate system; wherein manufacturing an insert comprises adaptive machining the insert based on said comparing; wherein the built-in features of the insert are not needed for functionality of the insert in the repaired gas turbine component, the built-in features being configured and arranged to allow clamping during at least one of the putting, adjusting, and forming steps, and assisting during the adaptive machining operation; and removing said built-in features not needed for functionality of the insert by machining after said joining. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for repairing a gas turbine component comprising:
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identifying on said gas turbine component a worn out location at which said gas turbine component is damaged; removing said damaged location and creating a missing zone; measuring the worn out location with a 3-D measuring system to determine an actual geometry of the missing zone, wherein a nominal geometry for the insert is defined by said actual geometry of the missing zone by establishing a component-specific reference coordinate system using characteristic features of the damaged gas turbine component including predefined gap tolerances and user-defined reference marks; manufacturing an insert which fits into said missing zone, wherein said insert is pre-cast with built-in features, said manufacturing including measuring an actual geometry of the insert and comparing the nominal geometry and the actual geometry of the insert based on the component-specific reference coordinate system; putting said insert into said missing zone; adjusting said insert in said gas turbine component; and joining said adjusted insert to said gas turbine component; wherein the built-in features of the insert are not needed for functionality on a surface of the insert, the built-in features being configured and arranged to extend from a surface of the insert and allow clamping during at least one of the putting, adjusting, and forming steps, and assisting during the adaptive machining operation. - View Dependent Claims (15)
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Specification