Discussion

Match the following metal forming processes with their associated stresses in the workpiece.

Answer: A

The correct matching is 1-S, 2-P, 3-Q, 4-R.

Coining squeezes the blank between closed dies, so the work is in compression (S).
Wire drawing pulls the wire through the die, so the applied stress in the drawn wire is tensile (P).
Blanking separates the blank by shearing between punch and die edges (Q).
Deep drawing stretches the cup wall in tension while the flange is squeezed in the hoop direction as it is drawn in, so it has both tensile and compressive stress (R).

Options that pair coining with tension or blanking with combined stress get the basic mechanism of those processes wrong.

No comment is present. Be the first to comment.

Loading…