5 times, but the tensile strength of polycrystalline diamond is only 70% of that of commonly used cemented carbide. In this way, the polycrystalline diamond die will have more advantages than the cemented carbide die. The wire drawing die made of polycrystalline diamond has good wear resistance, strong impact resistance, uniform inner hole wear and high wire drawing efficiency. So now polycrystalline diamond die has gradually been paid attention to in the metal wire drawing industry. Then compared with cemented carbide die, the use of polycrystalline diamond die wire drawing die has the following four obvious advantages. 1. Good wear resistance and long service life. The life of polycrystalline diamond wire drawing die is about 30 to 50 times that of cemented carbide die. During the drawing process, there is no need to stop frequently to replace the die. The diameter of the polycrystalline wire drawing die changes very little per unit time, and the size of the drawn wire changes little, which is very beneficial to the winding of the reel. Generally, the number of winding turns of the drawn wire is fixed. If the size of the finished wire increases rapidly, the number of winding turns decreases relatively rapidly, which requires the continuous change of the size of the reel, which is not conducive to the improvement of production efficiency. 2. High drawing efficiency During the use of the drawing die, the necessary maintenance is very important for the service life of the drawing die and the surface quality of the wire. It is usually recommended that customers maintain the polycrystalline diamond drawing die every 24 hours. Within 24 hours, the diameter of the polycrystalline diamond wire drawing die changes little, and the change rate of the wire diameter of the drawn wire is also small. For the whole production process, the wire diameter compression rate of each wire drawing die is relatively stable, and the ratio of input to output is large. 3. Reduce labor intensity Due to the long life of polycrystalline diamond wire drawing dies and the slow expansion, it is not necessary to replace the dies frequently, and it is not like the use of carbide wire drawing dies, which must always pay attention to the change of wire size. Such a Workers can take care of 4-5 wire drawing machines in the production process, which will greatly reduce the labor intensity of workers. Fourth, save raw materials If the wire rod with metal plating on the surface is drawn, the electroplating process does not stop when the drawing process is stopped, which will cause the thickness of the electroplating layer on the surface of the wire being electroplated to exceed the standard. Cut off, causing great waste, the more downtime, the greater the waste. The use of polycrystalline diamond molds can greatly reduce this waste. Now wire drawing dies are more common in our daily life, so you must make the necessary choices when purchasing wire drawing dies. The polycrystalline diamond wire drawing die is made of polycrystalline diamond, so the wire drawing die is relatively hard. The hardness of the polycrystalline diamond drawing die is better, so when using it, the polycrystalline diamond drawing die is also a better use of the drawing die, because it is relatively hard, so we can use the polycrystalline diamond drawing die to Handle a lot of things. Polycrystalline drawing die is a die widely used in wire drawing industry. Because it has better and better characteristics than other molds. It has a certain stability in the working process and can serve well in the industry we need. Compared with other molds, imported polycrystalline molds have higher hardness and wear resistance. It can well control the precision and smoothness of the material under the line, and it is cost-effective. Therefore, it has been widely used in industry. In today's society, we need high-quality, efficient tools. In China, there is still room for development of wire drawing dies. Although domestic wire drawing dies are comparable with foreign wire drawing dies, foreign wire drawing dies still have certain advantages in material selection and processing technology.