Monthly Archives: May 2021

Forging 101: The Hot Die Forging Process

Hot die forging, also known as isothermal forging, is one of the advanced forging used in the development of forged products from materials that can be a little bit difficult to forge using conventional means.

Hot die forging can be used to make a lot of products. You can look at the range of products that hotforgingchina is producing using the technology.


How the Hot Die Forging Works

What makes the hot die forging process unique from the other forging or the typical hot forging process is the heating of the die. Unlike the typical process where only the workpiece is heated, you will need to heat the dies to the same temperature.

The heating of the dies is meant to control the strain rates when forging to improve the precision of the process. The technique is mainly used for softer metals than steel because of the high difference in the forging temperature. This means the steel die will not deform when deforming the workpiece.

Pros of hot die forging

There are so many benefits that come with forging using the hot die forging process. Here are some of the things you will like about the process:

Near net shapes

One of the biggest benefits is that you will get near-net shapes with this forging process. This simply means that you will be spending very little or nothing when it comes to the machining process. So, the whole process will produce lower scrap rates.

High reproducibility

The reproducibility of the parts with the hot die forging process is very high. If you are planning to do mass production, then this would be the ideal process. Once you have set the dies and the press unit, you just need to maintain the heat of the die for mass production.

You Can Use Small Machines

The hot die forging has very low heat loss because the dies are already hot when bringing the workpiece. This means the temperatures of the workpiece can be maintained throughout the forging process. So, you can use smaller machines since the amount of compression force needed is small.

Cons of hot die forging

Some of the hot die forging disadvantages includes:


You need to invest in high-quality die material that can handle the high temperature and pressures. This makes the process quite expensive than the typical hot forging process.

Oxidation Reduction

You need to invest in protective atmospheres to reduce the oxidation in the die materials. This is also an extra cost.

The Process Of Cold Forging Copper

Cold forging copper forging is one increasingly growing popular. Copper is one of the metals that have grown in application, and this has gotten manufacturers looking for more efficient ways of producing it. Copper products are being used for a range of things, with the decorative application being the latest huge consumer of copper materials.

The cold forging copper process is not any different from other metals such as aluminum and steel. If you interested in cold forging copper materials, here are the steps that you need to consider:

  1. Lubrication

The first step is to lubricate the copper billet. This is one of the crucial stages, and skipping will significantly affect the quality of the copper product forged. Make sure that you have selected the right material for the copper forging. There are various grades of copper depending on the products you want to make. You must also make use of the right lubrication oil.

  1. Insert Metal In the Die

Make sure that you have the dies firm on the pressing machine. There are two dies that are used on the cold forging. The stationary die is placed on the working surface of the press machine. The second die is on the punch and is used for punching purposes. Place the copper material on the die, and be ready for punching.

  1. Punching

The third step in the process of cold forging copper is punching. This is where the actual forging of the machine takes place. Make sure that you have the copper billet properly placed on the billet. Then have the hydraulic press set to produce the right tonnage needed for the pressing of the copper. Then, punch it once as recommended.

  1. Flash removal

With the copper striking done, you need to remove the flash or the excess material that is squeezed out after punching. The flash material can be very hot and sometimes very sharp. So, you need to remove it carefully.

  1. Removing Forged part

The fifth step is the removal of the forged part from the die. This is pretty simple, considering that the material was properly lubricated. Because of the high heat produced when pressing, you need to consider using special handling tools to remove it.

  1. Finishing

For the cold forging, there may not be a need for finishing the forged products. But in case that you need to make finish, you can go ahead with it. Either way, it may not be such a big issue.