The significantly higher forces in impressiondie forging com

The significantly higher forces in impression-die forging compared to open-die forging are caused by which two of the following factors?

A. Flash formation.

B. Harder workpiece metals.

C. Impression-die forging is a cold-working process.

D. Larger parts.

E. Lower skill of press operator.

F. More complex part shapes.

Solution

a. flash formation:•The thin flash cools rapidly, and because of its frictional resistance, it subjects the material in the die cavity to high pressures, thereby encouraging the filling of the die cavity.

c.cold working process: so force requirement is higher