About 80 to 100 grit grinding wheels.
The grinding wheel used for grinding cold rolls is generally a soft grinding wheel with a particle size of 80 mesh to 120 mesh. The grinding wheel must be statically balanced carefully and repeatedly before use. When the grinding wheel is clamped, the impurities in the grinding wheel shaft and the tapered hole in the grinding wheel chuck must be cleaned to avoid causing the grinding wheel to be eccentric. After the grinding wheel is installed, repair it a few times, then remove it and do static balancing again. After the second static balancing, it can be used.
The grinding wheel must be redressed before use and after passivation. For grinders with bent grinding wheel shafts or twisted orbits, it is best to shape the grinding wheel busbar into an arc or use a disc when repairing the grinding wheel. shaped diamond dresser, which can effectively prevent or reduce the spiral pattern on the roller surface.
In addition, please note: ① Use an old knife to rough trim the grinding wheel, and use a new knife to fine trim the grinding wheel; ② When trimming the grinding wheel, the carriage speed and grinding wheel speed should be basically the same as those during operation. To 0.04 mm-0.09mm, it is advisable to repair 3-4 passes;
③ In order to eliminate the formation of record marks or individual bulges on the surface of the grinding wheel, it is recommended to use the empty tool when repairing the last cut; ④ The grinding wheel is completely dressed Finally, use a brush to clean the surface of the grinding wheel, and at the same time turn on the coolant to wash away the brushed sand;
⑤ When repairing the grinding wheel and grinding the roll, it is best not for the grinder to operate on the grinder Move around freely on the stage.