The size of grinding particles refers to the particle size of the grinding material, which directly affects the grinding efficiency and surface roughness. Grinding particles are usually made of different materials such as silica, alumina, silicon carbide, diamond, etc., and their fineness is usually expressed by the abrasive grain size. Common indicators of abrasive grain size include FEPA and JIS, etc.
Abrasive thickness difference
The coarser the abrasive grain size, the higher the cutting force and cutting rate, and the faster the grinding effect, but the surface roughness is larger. This is because larger abrasive grains can quickly remove more material. This situation is usually applicable to the machining process that requires the quick removal of larger materials.
The finer the abrasive grain size, the smoother the surface roughness, but because the abrasive grain size is smaller, the cutting force and cutting rate will decrease, and the grinding effect will be relatively slower. This situation is usually applicable to the machining process that requires high surface quality and precision.
Practical application
The selection of grinding particle size needs to consider multiple factors, such as the hardness, strength, wear resistance, and heat softening temperature of the grinding material, as well as processing requirements such as surface roughness, flatness, dimensional accuracy, etc.
Different processing requirements and workpiece materials require different grinding particle sizes and grinding methods to achieve the best processing results and product quality. Therefore, in practical applications, it is necessary to comprehensively consider various factors for selection.
Example
Taking silica sand as an example, the particle size distribution of silica sand is usually between 10 and 220 mesh, with the coarsest particle size being 10 mesh and the finest being 220 mesh. In practical applications, different grinding particle sizes will have different effects on the grinding efficiency and surface roughness.
For example, for grinding metal materials, silica sand with a particle size of 80 to 120 mesh usually achieves better grinding results and surface roughness; for grinding materials such as glass and ceramics, finer grinding particles sizes usually achieve higher grinding efficiency and smoother surfaces.
