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A Preliminary Investigation on Surface Roughness Assessment of Complex Additive Manufactured Parts Scanned by X-ray Computed Tomography

Lou, Shan, Abdou, Hussein, Zeng, Wenhan, Jiang, Xiang and Paul, Scott (2017) A Preliminary Investigation on Surface Roughness Assessment of Complex Additive Manufactured Parts Scanned by X-ray Computed Tomography. In: 7th Conference on Industrial Computed Tomography (iCT 2017), February 7 - 9, 2017, Leuven, Belgium. (Unpublished)

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The additive manufacturing (AM) technologies bring in a number of benefits over traditional subtractive manufacturing technologies. However as-built surface finish of AM produced components is often not satisfactory and usually needs further post-process. Surface roughness is vitally important to the product’s functional performance. However, the measurement and characterization of the complex functional AM surfaces is difficult due to their complicated shape or intricate internal geometries. XCT is current the only valid method that can measure complete internal and external geometry without constraints of traditional tactile and optical techniques. Nonetheless, XCT measurement posts two obstacles to standard roughness characterisation: the measured surface form and the non-uniform sampled measurement data structure. Aiming for a holistic and reliable roughness assessment, it is proposed to use the linear diffusion equation to achieve a Gaussian filtering effect on complex surfaces and to extend the roughness areal parameters on a triangular mesh.

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Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TS Manufactures
Schools: School of Computing and Engineering
School of Computing and Engineering > Centre for Precision Technologies > Surface Metrology Group
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References: [1] Innovate UK, Shaping our National Competency in Additive Manufacturing, 2012. [2] NIST, Measurement science roadmap for metal-based additive manufacturing, 2013. [3] S. Lou, A.Townsend, X. Jiang, L. Blunt, W. Zeng, P. J. Scott, On Characterising Surface Topography of Metal Powder Bed Fusion Additive Manufactured Parts, EUSPEN 16th International Conference, 2016. [4] J. P. Kruth, M. Bartscher, S. Carmignato, R. Schmitt, L. De Chiffre, A. Weckenmann, Computed tomography for dimensional metrology, CIRP Ann.-Manuf. Techn. 60, 821-842, 2011. [5] A. Weckenmann and P. Kramer, Computed tomography in quality control: chances and challenges, P. I. Mech. Eng. B-J. Eng. 227:634-642, 2013. [6] S. Lou, X. Jiang, W. Zeng, H. Abdul-Rahman, P. J. Scott, Investigation of the compatibility of XCT measurement data to surface topography analysis, Dimensional X-ray Computed Tomography Conference, 2016. [7] ISO 16610-21:2012 Geometrical product specifications (GPS) - Filtration Part 21: Linear profile filters: Gaussian filters. [8] X. Jiang, P. Cooper, P. J. Scott, Freeform surface filtering using the diffusion equation, Proc. R. Soc. A, 467, 841-859, 2010. [9] M. Desbrun, M. Meyer, P. Schröder and A. H. Barr. Implicit fairing of arbitrary meshes using diffusion and curvature flow, SIGGRAPH Conference Proceedings, 1999. [10] M. Meyer, M. Desbrun, P. Schröder and A. H. Barr, Discrete differential geometry operators for triangulated 2-manifolds, Int. Workshop on Visualization and Mathematics, 35-57, 2002. [11] H. Abdul-Rahman, S. Lou, W. Zeng, X. Jiang, P.J. Scott, Freeform texture reperesentation and characterization based on triangular mesh projection techniques, Measurement, 92: 172-182, 2016. [12] ISO 25178-2:2012 Geometrical product specifications (GPS) -- Surface texture: Areal -- Part 2: Terms, definitions and surface texture parameters.
Depositing User: Shan Lou
Date Deposited: 08 Mar 2017 13:56
Last Modified: 28 Aug 2021 16:15


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