Mathematical modeling of cutting forces in microdrilling

Kumar Sambhav, Puneet Tandon, Shiv G. Kapoor, Sanjay G. Dhande

Research output: Contribution to journalArticlepeer-review

Abstract

In drilling, the primary and secondary cutting lips of the drill shear the material while the central portion of the chisel edge indents the workpiece, making the cutting process complex to understand. As we go for microdrilling, it exhibits an added complexity to the cutting mechanism as the edge radius gets comparable to chip thickness at low feeds. The presented work models the forces by the primary cutting lip of a microdrill analytically using slip-line field that includes the changes in the effective rake angle and dead metal cap during cutting for cases of shearing as well as ploughing. To study the variation of forces experimentally, the primary cutting lip and chisel edge forces are separated out by drilling through pilot holes of diameter slightly above the drill-web thickness. Finally, the analytical and experimental results are compared and the model is calibrated.

Original languageEnglish (US)
Article number014501
JournalJournal of Manufacturing Science and Engineering, Transactions of the ASME
Volume135
Issue number1
DOIs
StatePublished - Jan 15 2013

Keywords

  • cutting edge radius
  • microdrilling
  • ploughing
  • shearing
  • slip-line

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering

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