What's about the Cold Heading Process? Cold Heading Punches

The HR carbide Co.,Ltd is manufacturing punches for cold heading of fastener industry, such as screws, self-tapping screws, bolts, nuts and parts: carbide first punches, second punches.
Typically, each die station in a heading machine has two punches that oscillate to form the fastener head. The first punch action partially shapes the head, known as the coning metals, while the second punch completes the head.Cold forming begins with a slug cut from a progressive coil or wire; then, the cold heading machine uses a chain of strong hammers and dies to form a part. Cold heading can also be defined as a process that applies force from a punch to the end of a metal blank in a die. The force must surpass the metal’s elastic limit or yield strength in order to permit plastic flow.