The Difference Between Open Die Forging and Closed Die Forging

1.Open die forging

Open die forging, as the name suggests, is a forging technology in which both sides of the die are not closed. Thanks to its wide applicability, it can easily shape large and structurally complex parts. In the open die forging process, the forged piece first needs to be heated to a suitable temperature and then placed between two open dies. Then, by applying pressure, the forging is deformed under the constraints of the mold until it reaches the desired shape. This forging method is often used to produce large parts such as wheel rims, gears, buttons and rails.

2.Closed die forging

Unlike open die forging, the mold of closed die forging is completely closed. This forging technology is particularly suitable for manufacturing parts with high-precision and high-quality requirements, such as aircraft engine parts, tank shells, and high-speed train axles. In closed-die forging, the forging is completely placed in a closed mold and exposed to high temperatures and pressures to exhibit its excellent material properties. The parts produced by this forging method are not only precise in size, but also have an even distribution of material.

3.The difference between the two

The main difference between open die forging and closed die forging is the structure of the mold. Open die forging uses a mold with openings on both sides, which is more suitable for the manufacture of large parts; while closed die forging relies on a completely closed mold and focuses more on the production of high-precision, high-quality parts. Therefore, when choosing a die forging method, it is necessary to determine the most suitable forging method based on the specific needs of the part, such as size, accuracy and quality requirements.