Influence of tool texture on friction and lubrication in strip reduction

Mohd Hafis Bin Sulaiman (Guest lecturer), Peter Christiansen (Guest lecturer), Bay, N. O. (Guest lecturer)

Activity: Talks and presentationsConference presentations

Description

International Conference on the Technology of Plasticity, ICTP 2017, 17-22 September 2017, Cambridge, United Kingdom

Abstract:
Tool texturing is studied as a method to enhance lubrication and prevent the occurrence of galling. Strip reduction test tools manufactured with longitudinal, shallow pocket geometries oriented perpendicular to the sliding direction are tested. The pockets have small angles to the workpiece surface and varying distance. The experiments show an optimum distance between the pockets to exist that creates table mountain topography with flat plateaus and narrow pockets in between. If the flat plateaus are too narrow, an increase in drawing load and pick-up on the tool plateaus is observed. The same occurs for too wide plateaus. A theoretical friction model supports the experimental findings of an optimum distance between the pockets, where the contribution to friction by mechanical interlocking of the strip in the pockets is limited and lubrication of the plateaus is enhanced by micro-plasto-hydrodynamic lubrication.
Period17 Sep 201722 Sep 2017
Held atUniversiti Malaysia Perlis, Malaysia
Degree of RecognitionInternational

Keywords

  • Textured tool surface
  • lubricant entrapment
  • mechanical interlocking
  • friction
  • strip reduction
  • ironing