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Influence of Surface Roughness Change on Frictional Behavior of Sheet Steel for Each Forming Mode

소성변형에 의한 냉연 강판의 표면 거칠기 변화가 마찰 특성에 미치는 영향

  • 한수식 (금오공과대학교 기계공학부)
  • Received : 2010.03.18
  • Accepted : 2010.04.02
  • Published : 2010.07.01

Abstract

The frictional behavior of bare steel sheet highly depends on surface roughness. It was investigated that the change of surface roughness of bare steel sheet due to deformation for each forming mode. The flat type friction test was done to check the effect of surface roughness change on frictional characteristics of bare steel sheet. As increasing the deformation, the Ra value was increased at stretching forming mode and drawing forming mode, however the change of Pc showed different trends. The Pc was decreased as increasing stretch deformation but increased at compression deformation. At drawing forming mode, the friction coefficient was increased as deformation was increased after initial big drop with drawing oil. As deformation was increased, the friction coefficient was decreased with drawing oil at stretching forming mode. The results show that the deformation changes the surface roughness and frictional characteristics of steel sheet but the effect depends on the forming mode.

Keywords

References

  1. S. S. Han, K. C. Park, 2008, Effect of Surface Roughness on Frictional Behavior of Sheet Steel for Automotive, Transactions of Materials Processing, Vol.17, No.5, pp. 401-406. https://doi.org/10.5228/KSPP.2008.17.6.401
  2. B. H. Lee, Y. T. Keum, 2002, Friction model for sheet metal forming analysis (Part1:Experiment), Transactions of Materials Processing, Vol.11, No.4, pp. 349-354. https://doi.org/10.5228/KSPP.2002.11.4.349
  3. W. T. Kim, D. H. Lee, M. S. Suh, Y. H. Moon, 2005, Analysis on parameters affecting the friction coefficient in drawbead forming of sheet metal, Transactions of materials processing, Vol.14, No.8, pp.668-674. https://doi.org/10.5228/KSPP.2005.14.8.668
  4. P. Skarpelos, J. W. Morris, Jr., 1997, The effect of surface morphology on friction during forming of electrogalvanized sheet steel, WEAR, Vol. 212, pp. 165-172. https://doi.org/10.1016/S0043-1648(97)00174-9
  5. E. Doege, C. kaminsky, A. Bagaviev, 1999, A New Concept for the Description of Surface Friction Phenomena, JMPT, Vol.94, pp. 189-192. https://doi.org/10.1016/S0924-0136(99)00102-8
  6. B. Ma, A. K. Tieu, C. Lu, Z. Jiang, 2002, A Finiteelement Simulation of Asperity Flattening in Metal Forming, JMPT, Vol.130-131, pp. 450-455. https://doi.org/10.1016/S0924-0136(02)00752-5
  7. M. Jonasson, A. Wihlborg, L. Gunnarsson, 1998, Analysis of Surface Topography Changes in Steel Sheet Strips during Bending under Tension Friction Test, Int. J. Mach. Tools. Manufact. Vol.38, No.5-6, pp. 459-467. https://doi.org/10.1016/S0890-6955(97)00090-4
  8. A. Azushima, M. Sakuramoto, 2006, Effects of Plastic Strain on Surface Roughness and Coefficient of Friction in Tension-bending Test, Annals of the CIRP, Vol. 55.
  9. T. C. Hsu, T. S. Yang, 2001, The Computer Simulation of Tribological Influence on Strain Path and Forming Limit in Punch Stretching of Sheet Metal, Advanced Manufacturing Technology, Vol. 17, pp. 393-399. https://doi.org/10.1007/s001700170157
  10. H. W. Lee, 2009, Research on Friction Behavior of Steel Sheets under Lubrication Conditions, Asia Steel 2009, p. 184.