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Factors related to grinding wheel affecting the surface roughness of grinding

2020-03-25 08:59:33

Mainly the grain size, hardness and the dressing of the grinding wheel.

The finer the grain size of the grinding wheel, the more abrasive grains per unit area of the grinding wheel, the finer the scratch on the grinding surface, and the smaller the surface roughness value. However, if the grain size is too fine, the grinding wheel is blocked easily, and the surface roughness value is increased, and at the same time, it ripples and burns easily.

Henan More Super Hard Products Co., Ltd

The hardness of the grinding wheel refers to the difficulty of the abrasive grains falling off the grinding wheel after being subjected to the grinding force. The grinding wheel is too hard, the abrasive grains cannot fall off after being worn, and makes the work-piece surface subjected to strong friction and extrusion, increasing the plastic deformation, and the surface roughness value is increased, and the burn is easily caused. The grinding wheel is too soft, and the abrasive grains are easy to fall off, weakening the grinding action, and increase the surface roughness value, therefore, choose the right hardness of the grinding wheel.

The dressing quality of the grinding wheel is closely related to the dressing tools and the longitudinal feed of the roller dresser. The dressing of the grinding wheel is to remove the passivated abrasive grains from the outer layer of the grinding wheel with a diamond so that the abrasive cutting edge is sharp and the surface roughness value of the grinding surface is reduced. In addition, the smaller the longitudinal feed amount of the roller dresser, the more the cutting micro-blade on the finished grinding wheel, and the smaller the surface roughness value is obtained.

Henan More Super Hard Products Co., Ltd