A precision cold metal formation process. Cold drawing forms metal wire from a pre-rolled or pre-drawn condition into a secondary or final shape by pulling it through precision draw dies. Cold drawing is used to form precision geometric shapes with tight dimensional tolerances from numerous grades of metal alloys, including high and low carbon steel, stainless steel, brass, copper, bronze, aluminum, and many other, exotic metals. Cold drawing may require several stages of drawing and yield shapes that are of machined quality. Cold drawing is extremely cost-effective when complex, tight tolerance components are needed in both small and large production volumes.
Drawing is a metal working process which uses tensile forces to stretch metal or glass. As the metal is drawn , it stretches thinner, into a desired shape and thickness. Drawing is classified in two types: sheet metal drawing and wire, bar, and tube drawing. The specific definition for sheet metal drawing is that it involves plastic deformation over a curved axis. For wire, bar, and tube drawing the starting stock is drawn through a die to reduce its diameter and increase its length. Drawing is usually done at room temperature, thus classified a cold working process, however it may be performed at elevated temperatures to hot work large wires, rods or hollow sections in order to reduce forces.
Drawing differs from rolling in that the pressure of drawing is not transmitted through the turning action of the mill but instead depends on force applied locally near the area of compression.