Grinding wheel: A rounded consolidated abrasive tool with a through hole made of abrasive and binder resin. Grinding wheel is the largest amount of abrasive, the use of the most extensive one, the use of high-speed rotation, the metal or non-metallic parts of the cylindrical, inner circle, plane and a variety of surface rough grinding, semi-fine grinding and Grinding and grooving and cutting and so on. In this case, In this case, Grinding wheel is the most important kind of abrasive grinding. The grinding wheel is a porous body which is prepared by adding binder, grinding, drying and baking. Due to the different abrasives, binders and manufacturing processes, grinding wheel characteristics vary widely, and therefore have a significant impact on the quality of grinding, productivity and economy. The characteristics of the grinding wheel mainly by the abrasive, particle size, binder, hardness, organization, shape and size and other factors. In this case, 1, classification A wide range of grinding wheel. In this case, According to the used abrasive can be divided into ordinary abrasive (corundum and silicon carbide, etc.) and natural abrasive grinding wheel superhard abrasive and (diamond and cubic boron nitride, etc.) wheel; According to the shape can be divided into flat-shaped grinding wheel, bevel wheel, cylindrical grinding wheel, cup-shaped grinding wheel, disc-shaped grinding wheel, etc .; according to binder can be divided into ceramic grinding wheel, resin grinding wheel, rubber grinding wheel, metal grinding wheel. Characteristics of the grinding wheel parameters are abrasive, viscosity, hardness, bonding agent, shape, size and so on. In this case, Since the grinding wheel is normally operated at high speed, it shall be subjected to a rotary test before use (to ensure that the grinding wheel does not rupture at the maximum operating speed) and a static balance test (to prevent machine vibration during operation). The grinding wheel should be trimmed for a period of time to restore grinding performance and correct geometry.