What IS Closed Die Forgings, And What's The Importance of It?

 

Closed die forgings are a forging process in which dies move towards each other and completely or partially cover the workpiece. The heated raw material is placed in the bottom die, roughly the shape or size of the final forged part. The forging shape is incorporated as a negative image in the top or bottom die. The effect of the top die on the raw material from above forms it into the required forged form.

 

Impression Die Forging:

 

Closed die forging operations, also known as impression-die forging processes, are used to shape metal workpieces into the desired shapes. In the metal industry, closed die forging processes have many applications.

 

Closed Die Forging Methods:

 

• The negative shape of the exact desired final shape is formed by two opposite dies in the closed die forging process. When the die is pushed against the metal piece, the metal piece takes on the shape of the entire closed die, similar to how the open die forging processes work. 
• There is a small space between the two opposing dies. Metal squeezes through this small opening and fills it. These metal flashes are trimmed when the metal cools. You can also use our eyebolts for your need.
• The purpose of these metal flashes is to create extra pressure on the metal inside the die. It happens when the metal flashes solidify inside the small gaps. This back pressure causes the metal to take the exact shape of the die's complex sides.
• Industry experts must use several consecutive shaping processes to achieve the exact shape, like open die forging processes.
• Different dies may be used to shape the metal part for another shaping die. This gradual shaping allows for the production of more intricate and high-quality parts.

 

Closed Die Forging Force Calculations:

 

The calculation of the required forces for closed die forgings processes is not as straightforward as for open die forging processes. Geometrical complexities and flash formation cause this calculation difficulty.

First, you must define a forging shape factor 'Kf' from the table. People can use other authorities' tables as well. Another option is flashless forging.

 

Advantages And Other Characteristics of Closed Die Forging:

 

• The ability to produce in large quantities is the most significant advantage of closed die forging operations.
• Close tolerances are also possible. Compared to alternative methods, the strength of the produced parts is superior, and material savings are very good.
• However, people must apply additional processes after the closed die forging processes. The precise geometry is obtained through additional processes such as machining.

In general, closed die forging operations yield a product with a near-net shape.

 

Endnote:

 

It is general information about the closed die forging operations we discussed. KDK Forging Co. makes great quality forgings products as per industrial standards. You can purchase closed die forgings products from us at a reasonable price.