With the development of science and technology, high-strength, high wear resistance, high hardness, high temperature resistant, lightweight new materials continue to emerge, while machining also to the continuous development of high-quality, high-precision, high-efficiency, automation direction, resin bond diamond grinding is increasingly unable to meet the above requirements, the emerging abrasive appear vitrified bond diamond wheel to solve these problems.
Vitrified bond diamond wheel with high strength, good heat resistance, sharp cutting, high grinding efficiency, grinding process is not easy fever and clogging, a small amount of thermal expansion, in order to control the machining accuracy. Compared with resin bonded grinding wheel, he solved the low life of the resin diamond wheel, grinding efficiency is low, the abrasive itself variability in the grinding process. It is based on the above-mentioned advantages of ceramic grinding wheel bond diamond wheel, it appears immediately developed countries in Europe and America widely used in the wafer (semiconductor silicon and solar wafers), polycrystalline diamond compact, polycrystalline diamond, diamond tools, cubic nitride boron, tungsten steel (alloy), new engineering structural ceramics, precious stones, crystal, rare earth materials (magnetic materials) high machining of hard and brittle materials, and achieved good economic benefits.
Pass where people thought the diamond wheel, diamond and iron group elements chemically inert, is not suitable for gray cast iron grinding of a workpiece, this case, however, occurs only at high temperatures. For example, diamond grinding wheel, when the temperature reaches 650 ° C, the diamond will be oxidized in air to 700 ° C to 800 ° C, it will graphite. At low temperatures, these materials are not react. So, as long as the appropriate choice of grinding speed and wet grinding, and adequate supply of grinding fluid, diamond wheel grinding castings, this has been proven in the production practice. Using wet grinding, diamond grinding wheel grinding gray iron grinding than grinding with CBN grinding wheel grinding of gray cast iron is much higher than the (2700) (9600). Generally people thought CBN grinding wheel is a soft material not suitable for grinding low-carbon steel, easy to make wheel then generated debris clogging. However, studies suggest that, vitrified bond CBN grinding wheel can take the the progress wheel speed, to form small debris, with the high-pressure injection grinding fluid to clear the debris, as well as an adequate supply of grinding fluid measures to prevent grinding wheel clogged. Therefore, CBN grinding wheels are low carbon steel (hardness greater than 30HRC) a class of soft materials. However, CBN grinding wheel is not grinding any material. Usually it is not suitable for grinding carbide and carbide steel assembly with a diamond wheel better results.