Cold Forging

Process Operations


cf1 1. Forward extrusion reduces slug diameter and increases its length to produce parts such as stepped shafts and cylinders.
cf2 2. In backward extrusion, the steel flows back and around the descending punch to form cup-shaped pieces.
cf3 3. Upsetting, or heading, a common technique for making fasteners, gathers steel in the head and other sections along the length of the part.