The
wire drawing process is quite simple in concept. The wire is prepared by shrinking the beginning of it, by hammering, filing,
rolling or swaging, so that it will fit through
the die; the wire is then pulled through the die. As the wire is pulled through
the die, its volume remains the same, so as the diameter decreases, the length increases. Usually the
wire will require more than one draw, through successively smaller
dies, to reach the desired size. This can be done on a small scale with a draw plate, or on a large commercial scale using automated machinery.The process of wire drawing improves material properties due to
cold working.