High-Throughput Dry and Minimum Quantity Lubrication Drilling of Compacted Graphite Iron

Kuzu A. T., Wu W., Stephenson D. A., Bakkal M., Hong J., Shih A. J.

7th CIRP Conference on High Performance Cutting (HPC), Chemnitz, Germany, 31 May - 02 June 2016, vol.46, pp.87-90 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 46
  • Doi Number: 10.1016/j.procir.2016.03.191
  • City: Chemnitz
  • Country: Germany
  • Page Numbers: pp.87-90
  • Keywords: Drilling, Wear, Chip, Productivity, CAST-IRON, TOOLS, WEAR
  • Istanbul Technical University Affiliated: Yes

Abstract

This research investigates the high-throughput drilling of the compacted graphite iron (CGI), a high strength, lightweight material for automotive powertrain applications, at 26.5 mm/s feed rate using 4 mm diameter coated carbide drill. The CGI drilling experiments show that maximum 1740, 3150 and 2948 holes were drilled in two repeated tests under the dry, dry with through-the-drill compressed air, and minimum quantity lubrication (MQL) conditions. The Joule-Thomson cooling effect due to expansion of high pressure air from holes at the drill tip and mechanical effect of chip formation and evacuation are studied. Results demonstrate that high-throughput sustainable dry drilling of CGI is technically feasible. (C) 2016 The Authors. Published by Elsevier B.V