How does the grinding wheel of the Surface Grinder affect the surface roughness of the work piece?

1. Mainly the particle size, hardness and dressing of the grinding wheel of the CNC Grinding Machine. The finer the particle size of the grinding wheel of the CNC Surface Grinding Machine, the more abrasive grains per unit area of the grinding wheel of the CNC grinding machine, the finer the notch on the grinding surface, and the smaller the surface roughness value. However, if the particle size is too fine, the grinding wheel is easy to be blocked, which increases the surface roughness value, and at the same time, it is easy to produce ripples and cause burns.

2. The hardness of the grinding wheel of the CNC surface grinding machine refers to the difficulty of the abrasive particles falling off the grinding wheel after being subjected to the grinding force. The grinding wheel is too hard, and the abrasive grains cannot fall off after being worn, so that the surface of the work piece is subjected to strong friction and extrusion, which increases the plastic deformation, the surface roughness value increases, and it is easy to cause burns; the grinding wheel is too soft, and the abrasive grains are easy to fall off. The weakening of the grinding effect will also increase the surface roughness value, so it is necessary to choose the appropriate hardness of the grinding wheel of the CNC grinding machine.

3. The dressing quality of the grinding wheel of the CNC Surface Grinder is closely related to the dressing tools used and the longitudinal feed of the dressing grinding wheel. The dressing of the grinding wheel is to remove the passivated abrasive grains on the outer layer of the grinding wheel with diamond, so that the cutting edge of the abrasive grains is sharp and the surface roughness value of the grinding surface of the CNC grinding machine is reduced. In addition, the smaller the longitudinal feed of the dressing grinding wheel of the CNC grinding machine, the more cutting micro-edges on the grinding wheel, and the better the contour, thereby obtaining a smaller surface roughness value.