Characteristics of abrasive tools

Self-sharpness: During the use of abrasive tools, when the abrasive grain are dull, due to the grain fragmentation of the abrasive grain themselves or the fracture of the binder, the abrasive grain fall off locally or completely from the abrasive tools, and the abrasive materials on the working surface continue to appear new cutting edges, or continue to expose new sharp abrasive grain, so that the abrasive tools can maintain cutting performance in a certain time. This is a prominent feature of grinding tools compared with general tools.

Hardness: abrasive hardness refers to the difficulty of the abrasive grain falling off the surface under the action of external force, which reflects the strength of the binding agent holding the abrasive grain. The hardness of the grinding tool mainly depends on the amount of binder added and the density of the grinding tool.

Organization: abrasive organization is roughly divided into close, medium and loose three categories, each category can be further fine scores, etc., with the organization number to distinguish. The larger the tissue number, the smaller the percentage of volume accounted for by the abrasive in the abrasive tool, and the wider the gap between the abrasive grain, indicating the looser the tissue. Conversely, a smaller organization number indicates a tighter organization. The abrasive tool with looser structure is not easy to passivate when used, and has less heat during grinding, which can reduce the heat deformation and burn of the workpiece; The abrasive grain of the tighter structure are not easy to fall off, which is conducive to maintaining the geometric shape of the abrasive tool.