The Forging Process
CUTTING
Material Inspection
Inventory of square and round billets and ingots
Billets in condition:
hot rolled
casted
continuous casted
forged
Cutting Departement
Cutting of square billets
Cutting of round billets
Weight control
Visual control
Open-Die Forging
Starting stock, held by manipulator
Open-die forging
Progressive forging
Visual and dimensional control
ROLLING
Ring Rolling
The ring rolling process typically begins with upsetting of the starting stock on flat dies at its plastic deformation temperature – in the case of grade 4340 steel, approximately 1250° C.
Piercing involves forcing a punch into the hot upset stock causing metal to be displaced radially, as shown by the illustration to the right.
The doughnut-shaped preform is slipped over the ID roll shown here from an “above” view.
A side view of the ring mill and preform workpiece. Workpiece, thus squeezing it against the OD roll which imparts a rotary action...
...resulting in a thinning of the section and a corresponding increase in the diameter of the ring. Once off the ring mill, the ring is then ready for secondary operations such as close tolerance sizing, parting, heat treatment and test/inspection.
Visual and dimensional control
