Grinding is generally used as the final process of workpiece processing, and its task is to ensure that the product parts can meet the accuracy and surface quality required on the drawings. Grinding surface roughness is closely related to the precision of parts, and a certain precision should have a corresponding surface roughness. In general, to effectively control the size, the roughness Ra value should not exceed one-eighth of the dimensional tolerance. The effect of the grinding surface roughness on the performance of the part is: the smaller the surface roughness value, the better the part The better the wear resistance, corrosion resistance and fatigue resistance. The opposite is the opposite.
Therefore, in the grinding process, attention must be paid to reducing the surface roughness. Among the main technological factors affecting the surface roughness of grinding process, the particle size of the grinding wheel has a significant impact on it. The finer the particle size of the grinding wheel, the more abrasive particles involved in grinding at the same time, the lower the grinding surface roughness.
There are two problems in form grinding: one is the quality of the grinding wheel, mainly because the grinding wheel must have good self-sharpening and shape retention at the same time, and the two are often contradictory. The second is grinding wheel dressing technology, that is, obtaining the required grinding wheel profile and sharpness efficiently and economically.
To sum up, in the grinding of different materials and process conditions, the reasonable selection of grinding wheels can reduce the precision of the grinding surface, improve the quality of the grinding surface, double the grinding efficiency, and achieve low-cost processing. The effect of grinding wheel is long, the dressing frequency is low, the metal removal rate is high, the grinding force is small, and the cooling effect is good.
Post time: May-04-2023