Our factory produces high-volume ferrite components in large quantities, and the products need to be ground. The material is hard and brittle because it is a hard-to-grind material. In order to improve production efficiency, we use diamond grinding wheels for grinding. Although the diamond wheel is more durable, the diamond wheel is the same as the ordinary wheel, and the grinding surface will be blunt and uneven. The production efficiency is lowered, the roughness of the processed surface of the product is increased, and the grinding precision is lowered. In this case, the ordinary grinding wheel can be trimmed and then used after being trimmed with a large particle diamond. The diamond wheel was replaced by a new one because it could not be neatly used. It is a pity that the old wheels are discarded. Through on-site inspection and analysis, we believe that the grinding layer on the diamond grinding wheel is 3mm thick, and the bonded diamond particles are of course