Drawing die basic structure, the main working area of the drawing die the hole, the nature of work within the pore structure can be divided into an inlet zone, Lubrication zone, sizing zone, outlet zone and five zones and follow the "smooth transition" theory, namely the wire drawing die hole The junction of the inner districts must be a small rounded transition. The drawn wire enters the wire drawing die from the entrance, and it acts on the drawing force iDown through the drawing die, and violent friction occurs on the tapered surface of the working area of the drawing die, and pull out from the exit to obtain a smaller wire.