The layout of the drawing die core can be divided into five sections: "import zone, smooth zone, operation zone, sizing zone, and exit zone" according to the nature of the operation. It is important to summarize the inner diameter of the drawing die, which determines the tensile force required to tighten the wire and affects the residual stress in the wire after drawing. The effects of each area of the mold core are: the entrance area, which facilitates threading and prevents the wire from scratching the wire drawing die; the smooth area, through which the steel wire is easily brought into the smoothing agent; the work area is the primary part of the die hole, the deformation of the wire The process takes place here, reducing the original section to the required section size. When drawing metal with a conical surface, the space occupied by the volume of the metal in the working area is a circular table, which is called the deformation area. The cone half angle α (also known as the die hole half angle) in the working area is mainly used to determine the size of the drawing force; the effect of the sizing area is to obtain the precise size of the drawn wire; the exit area is used to avoid the unstable exit of the wire While scratching the appearance of the wire.