A comparative analysis beetwen two different non-contact methods of reverse engineering (RE) data acquisition, a laser system and an ultrasonic system, is carried out. The product selected for the comparison is a turbine blade for aeronautical engines. This product is characterized by a complex external geometry as well as by internal features (cooling channels). In a first phase, the shape of the turbine blade was acquired in the form of point clouds using the two RE methods. In a second phase, the geometrical features of the turbine blade were reconstructed on the basis of the obtained point clouds. In the final phase, a comparison between the two reconstructions was performed. The systems characteristics, the point clouds and the resulting surfaces were compared and critically assessed. The obtained results confirm the conclusions in another article where a first comparison between the two non-contact RE systems was carried out and the remarkable potentialities of a hybrid laser-UT (Ultrasonic) RE system for industrial applications were emphasized. As a matter of fact, in the case of a RE application to turbine blade dimensional and geometrical quality control, the laser system capability of rapid acquisition and reconstruction for turbine blade profile verification could be conveniently combined with the UT system capability to perform internal feature reconstruction for turbine blade wall thickness accurate measurement.
Acquisition and reconstruction of a turbine blade for a comparative analysis between two non-contact reverse engineering methodologies
Erfassung und Rekonstruktion einer Turbinenschaufel für eine vergleichende Analyse zwischen zwei berührungslosen Reverse-Engineering-Methodologien
2004
6 Seiten, 16 Bilder, 6 Tabellen, 13 Quellen
Aufsatz (Konferenz)
Englisch
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