Performance verification of areal surface texture measuring instruments with the Sk-parameters

• Published in: Measurement : journal of the International Measurement Confederation Vol. 173; p. 108550
• Main Authors: Eifler, Matthias, Klauer, Katja, Kirsch, Benjamin, Aurich, Jan C., Seewig, Jörg
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 01.03.2021; Elsevier Science Ltd
• Subjects: Calibration; Composite materials; Functional characterization; High speed machining; Material Measures; Measurement uncertainty; Measuring instruments; Micro-milling; Milling (machining); Parameters; Performance specification; Standardization; Surface layers; Surface roughness; Surface texture measurement; Surface topography; Texture; Verification; Workpieces; Measurement uncertainty; Surface texture measurement; Performance specification; Micro-milling; Verification; Surface topography; Calibration; Material Measures; Functional characterization
• ISSN: 0263-2241; 1873-412X
• DOI: 10.1016/j.measurement.2020.108550

•The versatility of model-based design of areal material measures is demonstrated.•Samples for performance verification with the Sk-parameters are designed.•Samples are manufactured with micro-milling tools featuring radii of 10–100 µm.•Arbitrary, complex surface texture parameters can be mapped based on real surfaces.•The absolute systematic deviations of the mapped parameters range from 1 nm to 67 nm. The calibration, adjustment, performance specification, and verification of areal surface texture measuring instruments are a topical subject in standardization. While a calibration framework has been prepared and is currently being tested for its practical application, additional studies are required for the verification based on areal surface texture parameters. Currently, mostly amplitude-based parameters like Sa or Sq are applied. However, it is useful to adapt verification towards more meaningful surface texture parameters. We describe different use-cases based on the Sk-parameters of ISO 25178-2 that are associated with functional characteristics of the workpiece. Material measures for the mapping of the Sk-parameters are designed based on component surfaces with a model-based design approach. These material measures enable practical performance verifications with functional characteristics. The designed material measures are manufactured by micro-milling with tool radii of (10–100) µm. The versatility and the nanometer precision of the design approach are presented for different machining parameters.