Effect of the grit shape on the performance of vitrified-bonded CBN grinding wheel

摘要

This paper deals with the effect of the CBN grit shape on the grindability of a low alloy chrome steel, 100Cr6. Firstly, a simple wheel-workpiece interaction model is introduced to investigate the grinding response. The formulation considers the global grinding forces, which embodies all the properties of the wheel acting at the interface. The use of this approach eliminates the need to consider the interaction of each individual grit with the workpiece during the grinding process. Next, a series of tailored grinding tests conducted with a creep-feed grinding machine are used to evaluate the grinding performance and the wheel wear. The results have shown that the specific grinding energy (u_e) is affected by the CBN grit shape, and the wheel wear is proportional to the ratio of the CBN shape factor (Aspect Ratio) and the overall bearing surface of the wheel-workpiece contact area (a_f).