METHOD AND MEASURING SYSTEM FOR CHARACTERIZING A DEVIATION OF AN ACTUAL DIMENSION OF A COMPONENT FROM A NOMINAL DIMENSION OF THE COMPONENT

• US 20090248356A1
• Filed: 03/27/2009
• Published: 10/01/2009
• Est. Priority Date: 03/28/2008
• Status: Active Grant

• Current Assignee: MTU Aero Engines GmbH (MTU)
• Original Assignee: MTU Aero Engines GmbH (MTU)
• Inventors: KRIEGMAIR, Josef
• Granted Patent: US 8,195,424 B2
• Time in Patent Office: Days
• US Class Current: 702/155
• CPC Class Codes: G01B 21/045 Correction of measurements G01B9/02055 takes precedence

Abstract

A method and a measuring system for characterizing a deviation of an actual dimension of a component from a nominal dimension of the component, is disclosed. In an embodiment, the method includes a) determining at least one measured value characterizing the actual dimension at a position of the component by a measuring device; b) making a nominal value available with which the nominal dimension is characterized as a function of the position of the measured value; c) determining a spatial distance between the measured value and the nominal value; d) making a limiting criterion available with which a permissible deviation from the nominal value is characterized as a function of the position of the measured value; and e) determining a tolerance utilization value characterizing the deviation for the measured value as a function of the spatial distance and of the limiting criterion.

Claims

1. A method for characterizing a deviation of an actual dimension of a component from a nominal dimension of the component, comprising the steps of:

a) determining a measured value characterizing the actual dimension at a position of the component by a measuring device;

b) making a nominal value available with which the nominal dimension is characterized as a function of the position of the measured value;

c) determining a spatial distance between the measured value and the nominal value;

d) making a limiting criterion available with which a permissible deviation from the nominal value is characterized as a function of the position of the measured value; and

e) determining a tolerance utilization value characterizing a deviation for the measured value as a function of the spatial distance and of the limiting criterion.

2. The method according to claim 1, wherein the steps a) through e) are performed multiple times and/or at several positions of the component.

3. The method according to claim 1, wherein an upper and/or a lower limit value is used as the limiting criterion.

4. The method according to claim 3, wherein the upper and the lower limit values are selected with a same and/or a different spatial distance from the nominal value.

5. The method according to claim 1, wherein the spatial distance in step c) is determined on a basis of a perpendicular and/or a height intersecting line on the nominal dimension at the position of the component.

6. The method according to claim 1, wherein a color value is assigned to the tolerance utilization value determined in step e) and is displayed by an optical display unit.

7. The method according to claim 6, wherein the color value is assigned to the tolerance utilization value on a basis of a variable system of values and/or on a basis of predetermined fixed values and/or symmetrically.

8. The method according to claim 7, wherein the steps a) through e) are performed multiple times and/or at several positions of the component and wherein a range of several measured values determined in step a) is used as the variable system of values.

9. The method according to claim 1, wherein the component is a flow machine component.

10. The method according to claim 9, wherein the flow machine component is a gas turbine.

11. A measuring system for characterizing a deviation of an actual dimension of a component from a nominal dimension of the component, comprising:

a measuring device, wherein the measuring device determines a measured value characterizing the actual dimension at a position of the component;

a storage device, wherein the storage device makes available a nominal value and a limiting criterion, wherein with the nominal value the nominal dimension is characterized as a function of the position of the measured value and wherein with the limiting criterion a permissible deviation from the nominal value is characterized as a function of the position of the measured value;

a detecting device, wherein the detecting device determines a spatial distance between the measured value and the nominal value; and

a determining device, wherein the determining device determines a tolerance utilization value characterizing a deviation for the measured value as a function of the spatial distance and of the limiting criterion.

12. The measuring system according to claim 11, wherein the measuring device is an optical and/or an irradiating and/or an acoustic and/or a mechanical measuring device.

13. The measuring system according to claim 11, wherein the detecting device and/or the determining device and/or the storage device is a part of a data processing system.

14. The measuring system according to claim 11, wherein the measuring system includes an optical display unit, wherein a color value assigned to the tolerance utilization value is displayable.