Posted in | Aerospace Materials

Quality Assurance of Turbines Blades with Optical 3D Metrology

The optical 3D measurement device InfiniteFocus by Alicona is used to examine cooling holes, edge geometries of the blade root and the air foil, as well as coating results.

This high-resolution optical measurement device is based on the principle of combining all the functions of a micro-coordinate measurement system and a roughness measurement device in a single sensor. In this way, users can measure both the geometry and the surface of turbine blades with just one system.

In the quality assurance of cooling holes, it is vital to verify that the angles, sizes, and shapes of up to 500 differently formed micro holes correspond exactly to their CAD data. Optical measurement with Focus-Variation is used to examine two areas in particular: the drill hole itself and where the drill hole transitions into the surface. Roundness, diameter, and angle at the transitions are especially relevant parameters. Measurement of the cooling holes at different positions is performed automatically by using special CAD/CAM software. Deviations from the target geometry are displayed instantly.

In addition to the 3D measurement of cooling holes, InfiniteFocus is used for edge measurement as well. Proper edge preparation of the leading and trailing edge of the airfoil ensures optimized aerodynamic properties and consequently makes the turbine more efficient. Edge measurement of the blade root is especially challenging, as it often involves a curvature with radii of varying sizes. Here, InfiniteFocus provides high resolution, traceable measurements in high repeatability.

Next to the measurement of micro holes and edges, roughness measurement is performed to verify coating processes. Before the coating is applied, an areal roughness measurement (Sa, Sq, Sz values) is carried out to verify that the surface of the turbine blade has been roughened properly. Then, after coating, coating thickness is verified by way of a difference measurement.

Visit Alicona at Mach -Hall 5 / Booth 5919. Get your free ticket here!

Learn more about Alicona metrology
 

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Bruker Alicona. (2019, February 08). Quality Assurance of Turbines Blades with Optical 3D Metrology. AZoM. Retrieved on October 25, 2020 from https://www.azom.com/news.aspx?newsID=45394.

  • MLA

    Bruker Alicona. "Quality Assurance of Turbines Blades with Optical 3D Metrology". AZoM. 25 October 2020. <https://www.azom.com/news.aspx?newsID=45394>.

  • Chicago

    Bruker Alicona. "Quality Assurance of Turbines Blades with Optical 3D Metrology". AZoM. https://www.azom.com/news.aspx?newsID=45394. (accessed October 25, 2020).

  • Harvard

    Bruker Alicona. 2019. Quality Assurance of Turbines Blades with Optical 3D Metrology. AZoM, viewed 25 October 2020, https://www.azom.com/news.aspx?newsID=45394.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Submit