Project ForgeSign up free
Manufacturing Engineering
Machining Processes
GATE 2007
Medium

In orthogonal turning of low carbon steel pipe with principal cutting edge angle of 90°, the main cutting force is 1000 N and the feed force is 800 N. The shear angle is 25° and orthogonal rake angle is zero. Employing Merchant's theory, the ratio of friction force to normal force acting on the cutting tool is

  • A1.56
  • B1.25
  • 0.80
  • D0.64

Explanation

With rake angle α=0: friction force F=Fc sinα+Ft cosα=800N; normal force N=Fc cosα−Ft sinα=1000N. Ratio F/N=800/1000=0.80.

Source: GATE ME 2007 (2007)

This question is part of a 15-day revision cycle — sign in and Project Forge will bring it back the day before you'd forget it.

Start revising free