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Features Of Vitrified Grinding Wheel
Oct 31, 2018

With the continuous advancement of science and technology, various new ceramics, composite materials, crystal materials, and magnetic materials are widely used in industrial fields, but their difficult processing characteristics restrict the promotion of these materials. Compared with the resin bond and the metal bond diamond abrasive grinding wheels, vitrified diamond grinding wheels have the characteristics of strong self-sharpness, easy dressing, not easy to block during grinding and difficult to burn the workpiece. Therefore, the ceramic bond diamond grinding wheel is widely used in the precision machining of various hard and brittle materials. 

The pores are an important part of the ceramic bond diamond grinding wheel. The size and porosity of the ceramic diamond wheel have an important influence on the processing performance of the grinding wheel. The pore diameter and porosity of the grinding wheel can be controlled by adding different types and contents of pore-forming agents. There are two main methods for forming pores:One method is to add a pore-forming agent, such as refined naphthalene, phenol resin, carbon powder or ammonium salt to the grinding tool, which decomposes at high temperature and generates gas, thereby leaving pores in the grinding tool; Another method is to add hollow spheres, such as hollow glass microspheres or alumina hollow spheres.Since these hollow spheres have a relatively high melting point, they are not decomposed during sintering, thereby leaving closed controlled pores in the grinding wheel segments.The first method of pore formation is difficult to control the pore size, and the porosity and pore size of the second method are controllable.

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