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3725 |
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Friday, May 23, 2014, Hall A 12:00 PM Process Diagnostics, Sensors & Controls |
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3D thickness measurement of the layer buildup during twin wire arc spraying processes |
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Hans-Georg Rademacher / TU Dortmund / Institute of Materials Engineering, Germany Wolfgang Tillmann / TU Dortmund, Institute of Materials Engineering, Germany Reiner Zielke*/ TU Dortmund, Institute of Materials Engineering, Germany Leif Hagen/ TU Dortmund, Institute of Materials Engineering, Germany Bastian Ruether/ TU Dortmund, Institute of Materials Engineering, Germany Mohamed Abdulgader/ TU Dortmund, Institute of Materials Engineering, Germany |
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Thermal spraying processes are, in general, an insight process. Their efficiency is directly related to the position of the spraying gun to the substrate surface, as the topography of the substrate surface determines the path of the spraying gun. Therefore, in many cases, optimal conditions which have to be realized during the spraying process cannot be adjusted. As a consequence, the overall layer thickness and the dimensional accuracy are difficult to predict. The attained coating thickness is verified after the coating process by means of destructive testing techniques. In this work, a newly developed approach will be presented as an alternative. The developed measuring system is based on photogrammetry and allows the measurement of complex three-dimensional components with continuous contours. The coating thickness can be quickly computed after each gun path by subtracting two measured 3D-surface contours. Furthermore, the sequential layer buildup is also detectable. 3D measured coating thicknesses are comparable with the ones measured by conventional methods. The developed system could lead to an improvement of the reliability of the obtained coating quality. |