What diamond wheels are used for sharpening pcd pcbn cutting tools
Vitrified bond, resin bond and metal bond diamond wheels are used for grinding ,resharpening cutting tools (pcd, pcbn, cvd, mcd, carbide, ceramic, cermet)
The order of cutting edge collapse: metal bond grinding wheel>ceramic bond grinding wheel>resin bond grinding wheel.
When the particle size of the grinding wheel is greater than W10, the chipping value of the cutting edge is very sensitive to the particle size of the grinding wheel and increases with the increase of the particle size; when the particle size of the grinding wheel is less than W10, the chipping value of the cutting edge is not sensitive to the particle size of the grinding wheel.
The abrasive grains of the metal bond diamond grinding wheel are broken during the grinding process to keep the sharp state, so as to realize the grinding. The surface of the resin bond diamond grinding wheel will be deformed due to heat. A lower grinding speed should be adopted. The ceramic bond is made of It is made of a variety of materials, and the bond and diamond abrasive grains are easy to collectively fall off during the grinding process, resulting in pits on the surface of the PCD tool.
Equipment speed
In the process of sharpening PCD tools, higher or lower speeds cannot guarantee the quality of the cutting edge. A moderate speed is required to obtain the smallest cutting edge chipping. The rigidity of the sharpening machine tool affects the range of the optimal speed. Interval.
Grinding pressure
In general, the maximum value of edge chipping increases with the increase of grinding pressure. As the grinding pressure increases, the squeezing effect of a single abrasive particle on the PCD will also increase, causing the PCD to be more prone to cleavage and fatigue fracture. If the pressure is too small, the grinding efficiency will be low, and if the pressure is too high, the cutting edge is prone to chipping. It is necessary to determine the appropriate grinding pressure according to the equipment.
