Open Die Forgings

What is open die forging?

Open die forging involves shaping heated metal using a top and bottom die. The process takes metal that is heated at temperatures ranging from 500°F to 2400°F and places it between two dies (top and bottom). The top die is attached to a ram and the bottom die is attached to a hammer; this creates a pressing process which shapes the metal into the desired configuration.

Open Die Forging

Differences between open and closed die forgings

Open die forging is similar to closed die forging, however, there is one key difference. Open die forging uses two dies that do not mirror the shape of the piece that is being created whereas, closed die forging has dies that are specifically shaped for the desired configuration. The open die forge does not enclose the metal completely and therefore allows different dimensions to be created.

Products produced by open die forging

Open die forging is usually used in short run forgings of parts that have a simpler design. It can be used to produced items that range from a few pounds to hundreds of tons and therefore has no limit in the scale of the product. This includes:

  • Cylinders
  • Discs
  • Rings
  • Shafts
  • Sleeves

Industries open die forgings are used in

However, custom and more complex configurations can be produced from open die forging. Generally, products made by open die forging are used in industries such as the railways and in aircrafts.

Benefits of open die forging

One benefit of open die forging is due to the continuous working of the material through the shaping process, the grain structure is made stronger. This ensures the end product is hardwearing and the structural integrity of the forged material is at a premium level. Another benefit of open forging is the surface finish it provides. This method of forging creates a better surface finish compared to other methods.