Analysis of pore structure of drawing die

Structure of drawing die core according to the nature of the work can be divided into "five interval entrance area, lubricating area, work area, sizing zone, export zone". Inner contour drawing die is very important, it determines the required compression wire tension, and the influence of the residual stress in the drawn wire. The role of core districts are: the entrance area, convenient threading and prevent the wire from the entrance direction scratch wire drawing die; lubricating area, through which the wire is easy to be brought into the lubricant; work area, is the main part of die hole, the deformation process of steel wire here, the original section is reduced to the section size required. In the drawing conical metal, the work area metal volume occupied space is a truncated cone, the space known as the deformation zone. The work area of the cone half angle α (also known as die semiangle) is mainly used to determine the drawing force size; sizing area is the role of accurate size has been drawn wire; export area is used to prevent the steel export instability and scratching the surface of steel wire