What are the differences between die - forging flanges and free - forging parts?

Die forgings refer to a forging method in which a blank is formed by using a die on special die forging equipment to obtain forgings. The forgings produced by this method have accurate dimensions, a relatively small machining allowance, a relatively complex structure, and high productivity.

Open-die forgings:

Open-die forgings have low precision and simple shapes. Their shapes and dimensions are generally ensured by operators using general-purpose tools. They are mainly used for single-piece and small-batch production. For the manufacture of large and extra-large forgings, open-die forging is still the only effective method. Open-die forging requires a high level of technical skill from forgers, has poor working conditions, and has low production efficiency.

Differences between the two:

Open-die forgings: The product has a simple shape and is directly forged and formed on a friction press.

Die forgings: The product has a relatively complex shape and is extruded and formed by the upper and lower die cavities.