What is closed die forging? How to die forging?

The simple summary of closed die forging is that, in general, the gap between the upper die and the lower die is unchanged in the forging process, the blank is formed in the closed die chamber around, and there is no transverse flash, and a small amount of excess material will form a longitudinal flythorn, which will be removed in the subsequent process. Maple has a lot of experience in closed die forging and a very deep understanding of it.

The main advantages of closed die forging: forging geometry, dimensional accuracy and surface quality are maximized close to the product, eliminating the flash edge, and compared with open die forging, closed die forging can greatly improve the utilization of metal materials.

The necessary conditions for the process using closed die forging:

1. Accurate billet volume.

2. The billet shape is reasonable and can be accurately positioned in the mold.

3. The strike energy or strike force of the equipment can be controlled.

4. There is an ejector device on the device.

Advantages of forging

The forgings have high ductility and strong resistance to impact and fatigue loads.

Forging refines the structure of the metal.

By cutting from solid workpieces and then forming them, a lot of time, labor and materials can be saved compared to the production process of similar products.

Forging deforms the unidirectional fibers previously produced by rolling and increases strength by setting the orientation of the grains.

Forgings are easy to weld.

Due to the high working intensity, few defects are found and high reliability.

High precision can be objective

Closed die forging is made of special materials and technology, and has good wear resistance.

1, patented special grinding process refined, with superior wear resistance and fracture resistance

2, the sealing ring made of special materials, with high temperature resistance. Wear resistance and long service life. 3, after special processing, more durable. 4, the use of special treatment, with superior wear and impact resistance, durable mold material selection of high-gloss, wear-resistant steel manufacturing.

Commonly used die forging equipment is mainly die forging hammer, hot die forging crank press, flat forging machine, screw press and hydraulic press, each die forging equipment has its own structural performance characteristics, with different adaptability. When selecting the equipment, the basic selection principle must be followed: the use characteristics (or parameters) of the equipment must be adapted to the parameters and technical requirements of the die forging.