Summary: Wire drawing matching die is the work of determining the drawing pass, the size and shape of the die hole of the drawing die according to the size of the blank and the size of the wire during wire drawing, also called drawing program or drawing route formulation. It can be divided into single-pass drawing matching die and multi-pass drawing matching die. The main steps of drawing mold matching include the following four steps: 1. Select the blank; 2. Determine the number of intermediate annealing; 3. Determine the extension coefficient of the drawing pass and the distribution pass; 4. Check the mold. The article is about circular section metal In the two situations of wire drawing and special-shaped cross-section metal wire drawing, the steps and calculation methods of drawing die matching are introduced in detail.

　　2. Introduction to the principle of die matching of sliding wire drawing machine and calculation examples of die matching

　　Summary: Wire drawing die matching refers to the method of selecting each drawing wire die in the drawing process. There are two main points for reasonable die matching. One is mechanical; the sliding wire drawing machine has its fixed drawing wheel speed ratio. Through the calculation example of the real-moving wire drawing machine die matching calculation example, the correlation of drawing 7.2mm copper rod to 1.6mm copper wire is calculated. data;

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　　 is written in the front: There are many methods of drawing and matching molds, which can easily cause confusion. The most fundamental one is the value of the sliding coefficient. If you understand the advantages and disadvantages of taking the larger ones, and the advantages and disadvantages of taking the smaller ones, you will be able to do your job with ease. It is impossible to do a certain point in a deadlock in practice. It's not a simple calculation, just a calculation with a formula is enough. If your factory has 50 machines. It is the same to pull more than 6 specifications of wire. If you follow a certain formula, think about the minimum number of molds to be equipped. After the so-called drawing dies are matched, it is necessary to estimate which die may cause the wire breakage. Which mold will shrink the wire. It is necessary to estimate the reason for the broken wire. Don't make the copper rod hollow when the wire is broken. In fact, more than 70% of the hollow copper and broken wires are caused by self-drawing.