DIMENSION CONTROL AND MEASUREMENT OF TURBINE BLADES BY OPTICAL 3D SCANNER

Aleksandar Vranić; Snežana Ćirić Kostić; Zlatan Šoškić

Scientific paper ID 882 : 2013/3

DIMENSION CONTROL AND MEASUREMENT OF TURBINE BLADES BY OPTICAL 3D SCANNER

Aleksandar Vranić, Snežana Ćirić Kostić, Zlatan Šoškić

The paper analyzes dimension control and measurement of turbine blades by optical 3D scanner and software for inspection and control of 3D scanned objects. Turbine blade is one of the most important parts of turbine machinery, and the characteristic parameters, pressure ratio of the engine and rotating speed of the turbine are related to the shape and size of the blades. Therefore, profile measurement of a turbine blade is an essential issue during manufacturing process of the blade. However, determination of profile of turbine blades is complex task because of their complicated shape. Using 3D optical scanner and software for scanning and inspection, it is possible to perform quick and accurate measurement of dimensions in various segments and sections of a turbine blade. Basic precondition for successful inspection and control is appropriate orientation of a measured object with respect to the coordinate axis, which has important consequences for proper implementation of the dimension control process. This paper presents various methodologies for alignment of CAD model and 3D scan of a blade, and discusses measurement errors and uncertainties arising from those alignments. A method of alignment by application of auxiliary elements proved to provide the most stable results.

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Контрол на качеството измерване на размерите 3D сканиранеQuality control dimension measurement 3D scanningAleksandar Vranić Snežana Ćirić Kostić Zlatan Šoškić

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