Closed die forging, also known as impression die forging, is a metalworking process used to shape and form metal parts by hammering or pressing a metal workpiece between two dies that contain a specific pattern or impression. Closed die forging is a high-pressure, high-temperature process that produces high-quality parts with excellent mechanical properties.
The closed die forging process typically involves the following steps:
1、Preparation: The metal workpiece is heated to a specific temperature, which varies depending on the type of material being forged.
2、Placing the workpiece on the die: The workpiece is positioned on the bottom die, which contains the impression of the desired shape or pattern.
3、Closing the dies: The top die is brought down onto the workpiece, applying high pressure and compressing the material into the shape of the die.
4、Forging: The metal is forced to flow into the cavities of the die, forming the desired shape. The pressure is maintained for a specific period to allow for proper filling and compaction of the material.
5、Ejection: The finished part is removed from the dies, either manually or by an automatic ejection system.
Closed die forging can produce parts with excellent surface finish, high dimensional accuracy, and excellent mechanical properties such as high strength, toughness, and fatigue resistance. It is commonly used in the production of complex metal parts for various industries, such as automotive, aerospace, and engineering.
Closed die forging can be performed with different types of equipment, including hydraulic presses, mechanical presses, and forging hammers, depending on the specific requirements of the part being produced.
