Influence of binder on grinding wheel performance

Resin bond

The resin bond has high bonding strength, the linear speed of high-speed cutting grinding wheel can reach 80-100m/s, and the grinding load of heavy load grinding wheel increases from about 50kg in the past to more than 1000kg.

It is not easy to burn the workpiece in processing, and the resin is easy to carbonize above 230℃. The high temperature in processing makes the resin local carbonization, which produces self-sharpening, improves the sharpness of grinding and reduces the grinding temperature, so as to avoid burning the workpiece.

Resin grinding has certain elasticity, which is beneficial to improve the finish of the workpiece being processed. The choice of graphite, chromium oxide and other polishing materials as fillers can further reduce the roughness.

Metal bond

Metal bond has been widely used in grinding because of its high bonding strength, good formability and long service life. According to the different production process is divided into sintering, electroplating and brazing.

Sintering process
Sintered abrasives are mostly made of bronze and other metals as binders by high-temperature sintering method. They are characterized by high bonding strength, good formability, high temperature resistance, good thermal conductivity and wear resistance, long service life and can bear large loads. However, the grinding efficiency is low, and it is easy to jam and burn the workpiece. Moreover, dressing of metal grinding wheel is difficult.

Electroplating process

Electroplating abrasives is a kind of abrasives production process in which ni-Co alloy is deposited on the surface of metal matrix and the abrasives are fixed by electrodeposition. Abrasive is actually just mechanical embedded in the coating of metal, the control force for abrasive is small, in the load of high efficiency grinding easy to fall off (or flake) and lead to overall failure.
Because the production process of electroplating abrasives has only one layer of abrasives and uses higher grade abrasives, the processing efficiency of electroplating abrasives is high and the heat dissipation performance is good. Because there is only one layer of abrasive, so the service life is not as good as other binder abrasives, and in the case of the same abrasive particle size, the surface roughness of the workpiece processed by electroplating is poor.