Friction reduction in EHL contacts by surface microtexturing – tribological performance, manufacturing and tailored design

Titelangaben

Tremmel, Stephan ; Marian, Max ; Zahner, Michael ; Wartzack, Sandro ; Merklein, Marion:
Friction reduction in EHL contacts by surface microtexturing – tribological performance, manufacturing and tailored design.
In: Industrial Lubrication and Tribology. Bd. 71 (2019) Heft 8 . - S. 986-990.
ISSN 0036-8792
DOI: https://doi.org/10.1108/ILT-08-2018-0306

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Abstract

Purpose – This paper aims to derive tailor-made microtextures for elastohydrodynamically lubricated (EHL) contacts under consideration of manufacturing possibilities. Design/methodology/approach – Component tests were used for the evaluation of the influence of surface texturing on the friction behavior in the cam/tappet contact. Furthermore, the manufacturing possibilities and limitations of a combined mEDM and micro coining process and the feasibility of integration into a forming process were studied. Finally, a methodology based on transient EHL simulations and a meta-model of optimal prognosis was exemplarily used for microtexture optimization. Findings – It was found that surface texturing in EHL contacts with high amount of sliding is promising. Moreover, the combination of mEDM and micro coining and the integration into established production processes allow the manufacturing of microtextures with desirable structural parameters and sufficient accuracy. Originality/value – This paper gives a holistic view on surface microtexturing over several phases of the product life cycle, from the design, over efficient manufacturing to application-related testing.