金刚石磨具表面磨粒分布形态的定量评价

Quantitative Measurement of Grit Distribution of Diamond Abrasive Tools

为了定量评价磨粒在磨具表面的分布形态,采用静态磨刃密度Cs与磨粒分布均匀性CV两个评价指标来描述磨粒在磨具表面的分布信息。针对金刚石磨具的SEM图,对图片进行二值化处理及磨粒质点化,通过对质点的统计获得静态磨粒密度Cs,另一方面,采用泰森多边形法,获取各质点所占据的面积,利用γ分布的变异系数来评价磨粒的分布均匀性CV。利用所提出的两项指标,评价了同一磨具表面及不同磨粒排布磨具表面的磨粒分布形态,结果表明所提出的指标能较好地用于磨粒分布形态的评价。

This paper putted forward two parameters to evaluate the grit distribution quantitatively,which were as static grit density Cs and the distribution uniformity CV .The grit centroids were ob-tained from the binary picture processed from the SEM picture of the diamond tools.The static grits density Cs was obtained by counting the number of centroids.On the other hand,the area of every centroid was obtained through the Voronoi diagram approach.The distribution uniformity CV was defined as the coefficient of variation of the Gamma distribution of centroid area.Using the two parameters to evaluate quantitatively the grit distribution for the same wheel surface and different grit distribution surfaces,the results show that the grit distribution morphology can be evaluated better with those pa-rameters.