The structure of the wire drawing die core can be divided into five sections: "entry zone, lubrication zone, working zone, sizing zone, and exit zone" according to the nature of work. The inner diameter profile of the drawing die is very important, it determines the tensile force required to compress the wire and affects the residual stress in the wire after drawing. The functions of each area of the mold core are: the entrance area, which facilitates threading and prevents the wire from scratching the drawing die from the entrance direction; the lubrication area, through which the steel wire can easily bring lubricant into it; the working area, which is the main part of the die hole, deforms the wire The process is carried out here, that is, the original section is reduced to the required section size. When drawing conical metal, the space occupied by the volume of the metal in the working area is a truncated cone, which is called the deformation zone. The cone half angle α (also known as the die hole half angle) in the working area is mainly used to determine the drawing force; the sizing area is used to obtain the accurate size of the drawn steel wire; the exit area is used to prevent the unsteady exit of the steel wire And scratch the wire surface.
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