Application of CBN Grinding Wheel in Internal Grinding

CBN materials not only can be used to make cutting tools, and its biggest application is made to CBN grinding wheels, used for high speed high efficiency grinding and honing, which can make the grinding efficiency, grinding accuracy and grinding quality greatly increased.

The grinding efficiency of internal grinding has been very low, and the main reason is the stiff problem of grinding speed, grinding wheel material and grinding rod. In the production process, the time used in the finishing grinding wheel and replacing grinding wheel almost accounts for one-third or one- fifth of the working hours of every workpiece.

If CBN electroplated grinding wheel is applied in the internal grinding or groove grinding, and the grinding wheel speed is increased, and the diameter of grinding rod is also increased, it can improve the speed and feed rate of workpieces appropriately, which not only can ensure hole diameter, groove width size and shape accuracy, surface roughness and avoiding burns, but also improve the machining efficiency and reduce the processing cost.

For example, a domestic factory will machine a textile machinery rolling bearing bush with an annual output of 600000 pieces, grinding φ15.5+0.04 hole and the adjacent arc slot. If it is in the past, they will use chromium corundum grinding wheel (GG) for processing on M224 internal grinder with two process respectively, but the groove (arc) diameter difference and size and hole alignment are very difficult to be guaranteed, with low efficiency.

However, after using CBN grinding wheel, they thicken grinding rod, improve the feeding, save the time of dressing and replacement of grinding wheel, and completely solve the original problem. And then, they change to hole and groove grinding at the same time, namely installing two grinding wheels on the grinding rod, to improve the grinding efficiency by 1 times, saving a grinding machine. The surface roughness of processed workpiece is Ra0.63 microns; The grinding process parameters: υ(sand)=36m/s，υ2=19m/min，f (rough cutting)=1μm/r, f(fine cutting)=0.5μm/r; The buffing time t = bs, 10% concentration of emulsified value. To view more information about CBN grinding wheel, please visit the following company: Luoyang Xiwei Abrasives Co., Ltd.