cBNビトリファイドホイールの研削性能に及ぼす組織均一化の影響 : クラスタ研削試験に基づく砥粒切れ刃の挙動解析

概要

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This paper deals with the influence of uniformity in structure on the grinding performance of vitrified cBN wheels. In this report, in order to clarify the effect of the uniformity in structure on the behavior of cutting edges during grinding, cluster overcut fly grinding tests are conducted with two types of cBN cluster wheel made by a conventional manufacturing method and by the newly developed manufacturing method referred to as "coating method". The former is denoted by "conventional cluster wheel", while the latter is denoted by "uniform cluster wheel" because it has more uniform structure than that of the conventional cluster wheel. The average radial grain cutting edge wear in grinding with the uniform cluster wheel is smaller than that in using conventional cluster wheel. Moreover, the variation in the radial wear of individual grain cutting edge when using uniform cluster wheel is smaller than that in using conventional cluster wheel, because the fracture and/or releasing of cBN grains that take place locally on the wheel working surface are suppressed by making the wheel structure uniform.
2006-09-05