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 drawing die from the entrance, and it acts on the drawing force i

　　Down through the drawing die, and violent friction occurs on the tapered surface of the working area of the drawing die, and it is pulled out from the exit to obtain a smaller wire.

　　Selection of the size of each area of the drawing die

　　(1) Entrance area

　　The entrance angle of the inner hole of the drawing die is one of the important parameters, and it must be ensured that the contact point of the wire entering the die occurs

　　At the same height position in the reduction zone of the drawing die, and to facilitate the entry of the wire. The entrance area of the drawing die provides a smooth profile leading to the lubrication area and the deformation area, so that the lubricant can reach the working surface of the drawing die.