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

Stephan Tremmel (Engineering Design, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany)
Max Marian (Manufacturing Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany)
Michael Zahner (Department of Manufacturing Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany)
Sandro Wartzack (Engineering Design, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany)
Marion Merklein (Manufacturing Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Publication date: 24 November 2018

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 μEDM 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 μEDM 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.

Keywords

Citation

Stephan Tremmel, Max Marian, Michael Zahner, Sandro Wartzack and Marion Merklein (2018) "Friction reduction in EHL contacts by surface microtexturing – tribological performance, manufacturing and tailored design", Industrial Lubrication and Tribology, Vol. ahead-of-print No. ahead-of-print

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DOI

: https://doi.org/10.1108/ILT-08-2018-0306

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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