組織の均一化に基づく高性能ビトリファイドcBNホイールの開発研究

抄録

This paper describes the relationship between the uniformity of wheel structure and the grinding performance in vitrified bonded cBN wheels. The variation in successive cutting-point spacing on the wheel working surface decreases by improving the uniformity of wheel structure. Therefore, it has been expected that an improvement of the uniformity in wheel structure enhances the grinding performance of wheels. However, the relationship between the uniformity in structure and the grinding performance is not yet examined sufficiently because it is difficult to manufacture the grinding wheel having such an uniform structure. In this study, we propose a novel method of manufacturing cBN grinding wheels that is possible to improve the uniformity in wheel structure. The uniformity in structure of the wheel produced by the novel method is improved as compared with that of the wheel produced by the conventional method. As compared with conventional wheels, wheels produced by the novel method provide lower grinding force, higher grinding ratio, better roughness of finished surface and longer tool life.