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Friction Characteristics of Micro-scale Dimple Pattern under Mixed and Hydrodynamic Lubrication Condition  

Chae Young-Hun (경북대학교 트라이볼로지연구소)
Kim Seock-Sam (경북대학교 기계공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.22, no.2, 2005 , pp. 188-193 More about this Journal
Abstract
Surface texturing of tribological application is another attractive technology of friction reducing. Also, reduction of friction is therefore considered to be a necessary requirement for improved efficiency of machine. In this paper attempts to investigate the effect of density for micro-scale dimple pattern on bearing steel flat mated with pin-on-disk. We demonstrated the lubrication mechanism for a Stribeck curve, which has a relationship between the friction coefficient and a dimensionless parameter for lubrication condition. It is found that friction coefficient is depended on the density of surface pattern. It was thus verified that micro-scale dimple could affect the friction reduction considerably under mixed and hydrodynamic lubrication conditions from based on friction map. Lubrication condition regime has an influence on the friction coefficient induced the density of micro dimple.
Keywords
Friction; Micro dimple; Surface texturing; Boundary lubrication; Mixed lubrication; Stribeck curve; Friction map;
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