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Use of Morphological Method to Investigate the Influence of Surface Texture on Dimensional Measurement of Additively Manufactured Parts

Lou, Shan, Brown, Stephen, Sun, Wenjuan, Zeng, Wenhan, Abdul-Rahman, Hussein S., Jiang, Xiang and Scott, Paul J. (2017) Use of Morphological Method to Investigate the Influence of Surface Texture on Dimensional Measurement of Additively Manufactured Parts. In: Special Interest Group Meeting: Additive Manufacturing, 10–11 October 2017, Katholieke Universiteit Leuven (KU Leuven), BE.

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The high level of surface roughness of additively manufactured (AM) parts post challenges to the applicability of different dimensional measurement techniques, including tactile, optical and XCT. Tactile measurement is traditionally considered to have the best accuracy and traceability. However, tactile measurement can be significantly affected by the mechanical filtering effect. This work sets out to investigate the influence of the mechanical filtering effect of tactile measurement on AM parts. Both experiential and simulation work are unitised to reveal this effect. Particularly the numerical simulation based on the morphological method allows the single influence factor, i.e., the tip diameter to be investigated. The maximum measurement errors caused by the stylus tip mechanical effect are determined by the convex hull points of the measurement profile, which is equivalent to using an infinitely large stylus tip. The CMM and XCT results of measuring the AM cylinder diameters are compared, along with the application of morphological method to “compensate” the mechanical filtering effect of the stylus tip.

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Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Additive manufacturing, dimensional metrology, surface roughness, morphological method
Subjects: T Technology > TJ Mechanical engineering and machinery
Schools: School of Computing and Engineering > Centre for Precision Technologies > Surface Metrology Group
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References: [1] Weckenmann A., Estler T., Peggs G., McMurtry D. 2004 Probing Systems in Dimensional Metrology, CIRP Ann., 53 (2), 657-684. [2] Leach R 2014 Measurement Good Practice Guide No 37: The measurement of surface texture using stylus instruments. [3] Brown S, Sun W, McCarthy M B, Woolliams P 2016 Assessment of dimensional measurement tools to measure additively manufactured metallic parts, Proc. ASPE Summer Topical 200-205. [4] Aloisi V, Carmignato S 2016 Influence of Surface Roughness on X-ray Computed Tomography Dimensional Measurements of Additive Manufactured Parts, Case Stud. Nondestr.Test. Eval. 6 (B), 104-110. [5] Carmignato S, Aloisi V, Medeossib F, Zaninia F, Savio E 2017 Influence of surface roughness on computed tomography dimensional measurements, CIRP Ann. in press. [6] Schmitt R., Niggemann C. 2010 Uncertainty in Measurement for X-ray-computed Tomography Using Calibrated Work Pieces, Measurement Science and Technology, 21 (5): 054008. [7] Bartscher M, Neukamm M, Koch M, Neuschaefer-Rube U 2010 Performance Assessment of Geometry Measurements with Micro-CT Using a Dismountable Work-piece-near Reference Standard, 10th European Conference on Non-Destructive Testing, Moscow, Russia. [8] Boeckmans B, Tan Y, Welkenhuyzen F, Guo Y S, Dewulf W, Kruth J –P 2015 Roughness Offset Differences Between Contact and Non-contact Measurements, Proc. of 15th Euspen Int. Conf. 189-190. [9] ISO 10360-2 2009 Geometrical product specifications (GPS) -- Acceptance and reverification tests for coordinate measuring machines (CMM) -- Part 2: CMMs used for measuring linear dimensions. [10] Serra J 1982 Image Analysis and Mathematical Morphology Academic Press, New York [11] Lou S, Jiang X, Scott P J 2013 Geometric computation theory for morphological filtering on freeform surfaces, Proc. R. Soc. A, 469(2159): 20130150. [12] Lou S, Jiang X, Scott P J 2014 Morphological filters for functional assessment of roundness profiles, Meas. Sci. Technol. 6(25): 065005.
Depositing User: Shan Lou
Date Deposited: 25 Oct 2017 08:11
Last Modified: 28 Aug 2021 15:29


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