Cold Heading

As dies are required to be hard, and resistant to wear, corrosion, and impact, tungsten carbide can be the material for manufacturing dies, including tungsten carbide wire drawing dies, tungsten carbide cold heading dies, tungsten carbide hot forging dies, tungsten carbide gripper dies for making nails, and so on. Tungsten carbide cold heading dies are important types of dies. When we talk about cold heading dies, we should figure out what is cold heading. This article will bring you a brief introduction to cold heading from the following aspects:

1. What is the cold heading?

2. How does the cold heading process?

3. Application of cold heading

What is cold heading?

Cold heading is the process used to form metal parts at room temperature. Compared with other metal fabrication processes, hammers and dies are used at high speed to form the metal without heating the material.?

How does the cold heading process?

Usually, a large coil of wire is fed into a blank and pulled through a drawing machine. The drawing machine compressed the material to the desired diameter. It then passes into the cold heading machine.

Inside the cold heading machine, the blank is hit between a die and a pinch block, pushing the material into the die to create the desired shape. There are two techniques for forcing the material into the die. One is the upset method, the punch block forces the metal out of the die to produce a head larger than the initial blank. Another one is the extrusion technique, including forward extrusion and backward extrusion. With forward extrusion, the cavity of the two dies is smaller compared to the diameter of the wire, which creates compression. With backward extrusion, the metal is forced backward through a punch to create a hole or cavity.?

Application of cold heading

Cold heading can be used for creating custom screws, bolts, and other fasteners out of round metal stock. With technology developed, cold heading can be used to create highly specialized fasteners and specialty pieces. This includes fasteners used in bridges, automotive manufacturing, electronics, and specialty bolts.?

The cold heading die can also be used for all kinds of metal and non-metal powder pressing and stamping, steel bar, steel pipe stretching with large compression rate, top forging, perforation, stamping die, machine accessories, die core, and production of stamping die, such as stamping watch parts, musical instrument spring sheet, etc.

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