Aimed setting of coefficient of static friction via finishing by turn-milling
Engineering Design, Machine Elements, Product Development
Final Report Abstract
Against the background of increasing power densities in technical systems, high and reproducible coefficients of static friction are sought in frictionally engaged connections. Up to now, additional design elements or processes for functional surface coating or microstructuring have often been used for this purpose. But, these state-of the-art solutions entail significant extra efforts. The overarching aim of the project is therefore to generate the corresponding surface properties during finish machining without the application of any additional process. Thereby, the resource efficiency of the entire process chain is increased markedly. Consequently, the aim of the project is to investigate the potential of microstructuring by means of turn-milling. A special focus lies on an increase of the deformative friction component and thus the overall friction. The results of the investigations show that static friction values of up to µ = 0.8 can be achieved, which corresponds to around three to four times the value of a reference test with unstructured surfaces. The microstructuring of the surfaces also changes the friction characteristics. Thus, the coefficient of static friction is not only increased, but it is already achieved at smaller relative displacements. Furthermore, the coefficient of static friction is much more robust against contamination due to the dominant deformative friction component. The scientific findings of the project are therefore of great practical value. However, there are still open questions regarding the design and the generation of the microstructures depending on the material pairing.
Publications
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Geometrische Oberflächencharakterisierung von durch spanende Verfahren hergestellten Mikrostrukturen. In: Gröger, S. (Hrsg.); Weißgerber, M. (Hrsg.): Sächsisches Geometriesymposium 2020, Chemnitz. Chemnitz: Universitätsverlag Chemnitz, 2020, S. 143-153. ISBN: 978-3-96100-109-5
Funke, R.; Börner, R. & Schubert, A.
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Generation of friction-increasing surfaces by turn-milling. Journal of Manufacturing Processes, 80, 504-514.
Funke, Roman; Schanner, Jonathan; Hasse, Alexander & Schubert, Andreas
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Investigating the Friction Behavior of Turn-Milled High Friction Surface Microstructures under Different Tribological Influence Factors. Journal of Manufacturing and Materials Processing, 6(6), 143.
Schanner, Jonathan; Funke, Roman; Schubert, Andreas & Hasse, Alexander
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Turn-Milled High-Friction Surfaces—Investigations on the Influence of Nominal Surface Pressure and Load Direction. Lecture Notes in Production Engineering, 749-762. Springer International Publishing.
Funke, R. & Schubert, A.
