from the conferences organized by TANGER Ltd. provisional website
The paper presents the results of research aimed at the use of thermal imaging as the method of assessing changes in the structure of multi-layered ceramic forms, intended for the investment cast parts of air blades. Analysis of infrared radiation allows to notice anomalies resulting from incorrect temperature distribution, which, in combination with other methods of quality control, creates the possibility of developing an innovative system for monitoring unit processes of producing jet engine components. FLIR T640 thermal camera and dedicated FLIR software was used for the tests. The moulds were heated in a laboratory dryer to the temperature of about 200 °C, and then changes in radiation intensity were registered. The image generated by the camera served as input for analysis with use of Research IR software. As a result, of research and analysis, the relationship between the thickness of the moulds wall and the percentage decrease in temperature over time was determined and a comparative analysis of thermal images with prepared castings of the blades was carried out in order to detect visible real defects. The paper presents also innovative test bench, which feature is active thermovision equipment. Test stand was used to create comparison analyze between thermo-images from passive and active laboratory tests. Results of these tests lead to continuation of research in field of using thermovision methods as a new way to check quality of multi layered ceramics moulds.Keywords: Thermovision, ceramic moulds, metal cast, aviation, non-destructive testing
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