Cold forging uses strong pressure to shape metal at room temperature or below, which is significantly below the metal’s recrystallization temperature. Common techniques used in this process include:
Coining: Presses letters, logos, or other fine details into the surface of the metal.
Cold Heading: Forms heads on nails, bolts, and pins without cutting or welding.
Drawing: Pulls the metal through a die to reduce its cross-section and produce long wires or tubes.
Extrusion: Forces metal through a shaped die orifice under high pressure to create rods, bars, or tubes.
Advantages
This process offers a smooth and excellent surface finish.
It provides excellent dimensional accuracy and surface finish, although springback must be accounted for in die design.
Since there is no heating step, it saves a lot of energy.
