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Micromachines 2017, 8(6), 195; doi:10.3390/mi8060195

On the Application of Replica Molding Technology for the Indirect Measurement of Surface and Geometry of Micromilled Components

1
Department of Mechanical Engineering, Technical University of Denmark, Produktionstorvet, Building 427A, 2800 Kgs. Lyngby, Denmark
2
Department of Mechanical Engineering, Politecnico di Milano, via la Masa 1, 20100 Milan, Italy
*
Author to whom correspondence should be addressed.
Received: 24 May 2017 / Revised: 12 June 2017 / Accepted: 18 June 2017 / Published: 21 June 2017
(This article belongs to the Special Issue Micro/Nano Manufacturing)
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Abstract

The evaluation of micromilled parts quality requires detailed assessments of both geometry and surface topography. However, in many cases, the reduced accessibility caused by the complex geometry of the part makes it impossible to perform direct measurements. This problem can be solved by adopting the replica molding technology. The method consists of obtaining a replica of the feature that is inaccessible for standard measurement devices and performing its indirect measurement. This paper examines the performance of a commercial replication media applied to the indirect measurement of micromilled components. Two specifically designed micromilled benchmark samples were used to assess the accuracy in replicating both surface texture and geometry. A 3D confocal microscope and a focus variation instrument were employed and the associated uncertainties were evaluated. The replication method proved to be suitable for characterizing micromilled surface texture even though an average overestimation in the nano-metric level of the Sa parameter was observed. On the other hand, the replicated geometry generally underestimated that of the master, often leading to a different measurement output considering the micrometric uncertainty. View Full-Text
Keywords: replica technology; roughness; micromilling; surface metrology; dimensional micro metrology replica technology; roughness; micromilling; surface metrology; dimensional micro metrology
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Baruffi, F.; Parenti, P.; Cacciatore, F.; Annoni, M.; Tosello, G. On the Application of Replica Molding Technology for the Indirect Measurement of Surface and Geometry of Micromilled Components. Micromachines 2017, 8, 195.

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