Basic knowledge of polycrystalline wire drawing dies: 
. Because after the ring groove appears in the die hole of the wire drawing die, the small particles of the core material peeled off due to loosening on the ring groove grind the working area and the sizing area like abrasives. The metal wire entering the die hole, like a die rod, aggravates the wear of the die hole. At this time, the friction between the die hole and the metal wire increases, resulting in high temperature and aggravating the wear process.   
What is the main purpose of the polycrystalline wire drawing die?
Wire drawing dies are widely used, such as high-precision wires used in electronic devices, radar, television, instrumentation and aerospace, as well as commonly used tungsten wires, molybdenum wires, stainless steel wires, wire and cable wires and various alloy wires are drawn with diamond wire drawing dies The diamond wire drawing die has strong wear resistance and extremely high service life due to the use of natural diamond as raw material.
China is a major producer of wire rods, and its output ranks among the top in the world. China's wire drawing die manufacturing industry has developed rapidly since the 1980s. With the continuous improvement of wire drawing die manufacturing level and the continuous improvement of production technology, China's wire drawing die manufacturing technology has further developed, especially in the material, The structure and other aspects have made great progress. But in general, there is still a big gap with foreign countries. Although the types of wire drawing dies produced abroad are similar to those in China, the materials and processes used are more advanced, and the processing accuracy, durability and wear resistance of wire drawing dies are better than those of Chinese products. Therefore, strengthening the management of moulding, improving the quality level of wire drawing dies, and promoting the progress of moulding technology are important issues facing the moulding industry.