Recently X-ray Computed Tomography (CT) has successfully entered the field of industrial quality control, with interesting applications also for metal casting industry, including non-destructive testing and dimensional metrology. In particular, CT benefits of several advantages with respect to traditional dimensional measuring systems, as for example: simultaneous dimensional quality control and material quality control, non-destructive inspection of internal as well as external geometries, and reconstruction of complete and high-density point-clouds in relatively short time. Due to these advantages, CT is increasingly recognised as a very promising non-contact measuring technique and, therefore, several manufacturers and research centres are now investing in the further development of metrological CT systems and in widening their application in industry. This paper investigates accuracy and traceability of dimensional measurements carried out by state of-the- art industrial CT systems, by examining selected results obtained from the “CT Audit” project, which is the first international interlaboratory comparison of CT systems for dimensional metrology. The project was organized by the Laboratory of Industrial and Geometrical Metrology, University of Padova, Italy, and was carried out in the period from September 2009 to June 2011, involving 15 CT systems, from research institutions and companies working actively on industrial CT metrology in Europe, America and Asia.
Computed tomography as a promising solution for industrial quality control and inspection of castings
CARMIGNATO, SIMONE
2012
Abstract
Recently X-ray Computed Tomography (CT) has successfully entered the field of industrial quality control, with interesting applications also for metal casting industry, including non-destructive testing and dimensional metrology. In particular, CT benefits of several advantages with respect to traditional dimensional measuring systems, as for example: simultaneous dimensional quality control and material quality control, non-destructive inspection of internal as well as external geometries, and reconstruction of complete and high-density point-clouds in relatively short time. Due to these advantages, CT is increasingly recognised as a very promising non-contact measuring technique and, therefore, several manufacturers and research centres are now investing in the further development of metrological CT systems and in widening their application in industry. This paper investigates accuracy and traceability of dimensional measurements carried out by state of-the- art industrial CT systems, by examining selected results obtained from the “CT Audit” project, which is the first international interlaboratory comparison of CT systems for dimensional metrology. The project was organized by the Laboratory of Industrial and Geometrical Metrology, University of Padova, Italy, and was carried out in the period from September 2009 to June 2011, involving 15 CT systems, from research institutions and companies working actively on industrial CT metrology in Europe, America and Asia.
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