Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

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

혼합 및 유체윤활하에서 Micro-Scale Dimple Pattern의 마찰특성

  • 채영훈 (경북대학교 트라이볼로지연구소) ;
  • 김석삼 (경북대학교 기계공학부)
  • Published : 2005.02.01
Download PDF
⟨ Previous Next ⟩

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

References

  1. Nakada, M., 'Trends in engine technology and tribology,' Tribology International, Vol. 27, No.1, pp.3-8, 1994 https://doi.org/10.1016/0301-679X(94)90056-6
  2. Kato, A., Yasuda, Y., 'An analysis of friction reduction techniques for the direct-acting valve train system of a new-generation lightweight 2-Liter V6 Nissan engine,' SAE Paper No. 940992, 1994
  3. Ronen, A., Etsion, I. and Kligerman, Y.,' Friction-reducing surface textureing in reciprocating automotive components,' Tribology Transaction, Vol.44, No.3, pp.359-366, 2001 https://doi.org/10.1080/10402000108982468
  4. Hamilton, D.B., Walowit, J.A. and Allen, C.M., 'A theory of lubrication by micro-irregularities,' J. of Basic Engineering, March, pp.177-185, 1966
  5. Kim, D.H., Kim, J.K. and Hwang, P., 'Anisotropic tribological properties of the coating on a magnetic recording disk,' Thin Solid Films, Vol.360, pp.187-194, 2000 https://doi.org/10.1016/S0040-6090(99)00884-6
  6. Etsion, I. and Kligerman, Y. and Ghalperin, 'Analytical and Experimental investigation of lasertextured mechanical seal faces,' Tribology Transactions, Vol. 42, No.3, pp.511-516, 1999 https://doi.org/10.1080/10402009908982248
  7. Wang, X., Kato, K. and Adachi, K., 'The lubrication effect of micro-pits on parallel sliding faces of SiC in water,' Lubrication Engineering, Aug., pp.27-34, 2002
  8. Bhushan, B. and Gupta, B.K., Handbook of Tribology, McGraw Hill, 1991