The surface quality of the tungsten carbide mold is very demanding. Lower surface roughness can reduce friction and improve adhesion resistance. After the tungsten carbide mold is grinded, it is more important to eliminate the processing traces. In the manufacture of tungsten carbide molds, grinding and polishing processes are often neglected. It should be pointed out. In the entire tungsten carbide mold processing process, polishing work should account for one-third, because the appearance quality of tungsten carbide molds depends to a large extent on the polishing technology of tungsten carbide molds. The surface roughness of the tungsten carbide mold is reduced, the number of grinding times of the tungsten carbide mold is correspondingly reduced, and the service life of the tungsten carbide mold is correspondingly improved.
If the surface of the tungsten carbide mold is not polished enough, coupled with the characteristics of deep drawing of the stainless carbide sheet, it is easy to cause adhesion tumors, so the drawn product will have serious scratches. However, polishing the scratches on the product is time-consuming and ineffective. Therefore, we should make great efforts in the polishing process of tungsten carbide molds. Only the improvement of the surface processing accuracy of tungsten carbide molds can reduce product scratches, and the repair life of tungsten carbide molds can be greatly improved. In recent years, various new polishing technologies and polishing tools have emerged in China, and new technologies and new equipment such as ultrasonic, electrolytic polishing, abrasive jet, extrusion honing, etc. have been developed. According to the information, the electrochemical polishing experiment was carried out on the three materials of CrWMo, 3Cr12W8V, Cr12 tungsten carbide molds, and it was proved that this kind of polishing can change the surface roughness of the tungsten carbide mold cavity from the original Ra3.2 in only 5-10 minutes. -Ra1.6 is reduced to Ra0.4-RaO.2. At the same time, electrochemical polishing can also increase the surface hardness to improve wear resistance.
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