The size of the abrasive particles is referred to as particle size, particle size, the grinding quality, production efficiency is closely related to the particle size represented by the size number. 4 # -240 # screening method and classification; called micronized symbol W indicates the abrasive particle size is the basic size of the micronized. The basic dimensions of the abrasive particle size range, are shown in Table 01. Select the the ordinary abrasive particle size, can not be separated from the grinding method and grinding conditions. Typically, high grinding efficiency, roughness, ceramic grinding wheel or grinding wheel china in contact with the workpiece surface, the workpiece material toughness and ductility larger requirements. And machining of thin-walled parts, to be elected coarser granularity; while grinding hard and brittle materials, fine grinding, forming grinding, high speed grinding, you should choose a finer granularity. Choice of superhard abrasive particle size, can not be separated from the processing requirements, grinding conditions and a better range of grinding. Typically, coarse grinding use 80 # to 120 #; semi-fine grinding Optional 120 # to 180 #; the fine grinding chosen 180 # W40; grinding, polishing selection of W40 to W1.
For the special requirements of the grinding, the particle size of the abrasive can be appropriately adjusted, such as forming of grinding, in order to improve the formability of abrasive, the granularity of the selected particle size than the average grinding to fine.
Sintered metal bonded grinding wheel multi-bronze and other metals as a binding agent, manufactured using high-temperature sintering method, the combination of high strength and good formability, high temperature, thermal conductivity and good wear resistance and long service life, can withstand larger loads. Due to the grinding wheel during sintering shrinkage and deformation inevitably exist, before use of the grinding wheel shaping wheel dressing is more difficult. Commonly used in the production of grinding wheel roller shaping method not only in dressing laborious, but the diamond particles in the trimming process shedding more trimming the consumption of the grinding wheel itself, shaping low accuracy. In recent years, scholars from various countries have been carrying out research work of the special processing method trimming metal bond diamond wheel, mainly electrolytic dressing, EDM dressing and composite trimming. The electrolytic dressing method is fast, but the shaping accuracy is not high; EDM dressing method shaping high precision, both shaping can be dressing, but slower shaping; the composite dressing method electrolytic the EDM composite dressing method, mechanical and chemical compound dressing method etc., dressing better, but the system is more complex, sintered diamond wheel trim problem still has not been a good solution. Further, since the manufacturing process of the cutting wheel to determine the surface morphology is random, geometry, distribution, and the cutting edge of each of the abrasive grains in which the high degree of inconsistency, when grinding only a few high cutting edge cutting into the work, limit further enhance the grinding quality and grinding efficiency.