PCBN tool is an artificial cubic boron nitride tool, in high temperature can also maintain high hardness characteristics, mainly for the processing of iron.CBN(Cubic Boron Nitride) was first synthesized by us general electric (GE) under high temperature and high pressure by the manual method in the 1950s. Its hardness is second only to diamond but far higher than other materials, so it is collectively referred to as superhard materials with diamond.
The characteristics of PCBN tools
According to the added components, there are two types of PCBN sintered directly by CBN single-crystal sintering and PCBN sintered with a certain proportion of binder. According to the way of manufacturing composite: there are integrated PCBN sintered blocks and cemented carbide composite sintered PCBN composite pieces.PCBN composite tablets with the binder are widely used. The hardness of PCBN varies according to the proportion of binder added. The higher the binder content, the lower the hardness and the better the toughness. Different types of binder, the use of PCBN is different.
CBN is widely used in grinding because of its high hardness, chemical inertia and thermal stability under high temperature. Because the CBN has better than the other characteristics of the cutting tool material, so people began trying to apply to machine, but smaller particles of monocrystalline CBN, it is difficult to make knives, and CBN sintering property is very poor, difficult to make a larger CBN sintered body, until the 1970 s, the former soviet union, China, United States, Britain, and other countries have been developed as a cutting tool of CBN sintered body, Polycrystalline Cubic Boron Nitride PCBN (Polycrystalline Cubic Boron Nitride). Since then, PCBN has been applied in various fields of cutting with its superior cutting performance, especially in the cutting of high hardness materials and difficult materials. After more than 30 years of development and application, PCBN tool materials for processing different materials have emerged.
Demina has developed the CNC PCBN tool grinding machine, it can grind the edge and the circular arc of PCBN tools with high efficiency.
