Question

1. A metallic bar is to be cold withdrawn from 8mm diameter to 6 mm through a die with an angle, half-angle, of 15° and with coefficient of friction of 0.12. The strength coefficient for the bar K= 300 MPa and its strain hardening exponent n = 0.35. calculate:

1. Area reduction.
2. The inhomogeneous deformation factor, F.
3. The drawing force (N).
4. Is the reduction possible?

Answer 1