Question 1:

During turning (orthogonal cutting) of a ductile alloy by a tool having a rake angle of (a) 10°,

Cutting force is 1000 N and thrust force is 550N, chip thickness ratio (r) is 0.4 find the following

by first drawing Merchant Circle Diagram (MCD) and then solve by using equations listed

below. Compare both results.

a. Frictional force

b. Normal force

c. Shear Force

d. Friction angle

Steps:

1. Take appropriate scale for forces.

2. Draw the Merchant circle diagram (Steps detailed in the slides)

3. Calculate forces from the diagram.

4. Calculate forces from the equations.

5. Compare results obtained from step 3 and 4.