Through our affiliation with the Forging Industry Association, EGI is able to offer educational material on the forging process. All information developed by the Forging Industry Association is reprinted with permission.
Open Die Forging —
Forging produced by working between flat or simply contoured dies with unrestricted metal flow using repetitive strokes and continuous manipulation of the workpiece; sometimes called hand forging.
What is Forging?
Forging is manufacturing process where metal is pressed, pounded or squeezed under great pressure into high strength parts known as forgings. The process is normally (but not always) performed hot by preheating the metal to a desired temperature before it is worked. It is important to note that the forging process is entirely different from the casting (or foundry) process, as metal used to make forged parts is never melted and poured (as in the casting process).
Why use forgings and where are they used?
The forging process can create parts that are stronger than those manufactured by any other metalworking process. This is why forgings are almost always used where reliability and human safety are critical. But you'll rarely see forgings, as they are normally component parts contained inside assembled items such airplanes, automobiles, tractors, ships, oil drilling equipment, engines, missiles and all kinds of capital equipment - to name a few.
Types of Forging Processes
Closed Die or Impression Die Forging
Open Die Forging
Rolled Ring Forging
Open Die Forging Video: http://www.cinecraft.com/fia/ODP/ODPPLAY.html