Q1:
a. What is cold working in metal forming? State the advantages and disadvantages of cold working.
b. A single-pass rolling operation reduces a 20 mm thick plate to 16 mm. The starting plate is 200 mm wide. Roll radius = 250 mm and rotational speed = 15 rev/min. The work material has a strength coefficient of 600 MPa and a strength coefficient of 0.20. Determine (i) roll force, (ii) roll torque, and (iii) power required for this operation.