关键词: 砂带, 表面形貌, 量化评价, 磨粒出刃高度, 磨粒间距

Abstract:

In order to quantitatively characterize the three-dimensional surface topography of abrasive belts,a quan- titative evaluation method containing the power spectrum density analysis,the autocorrelation function analysis and the characteristic statistics analysis of abrasive grains is proposed,which considers the irregularity and randomness of the shape，size and distribution of the grains.Then,a set of parameters,namely,the cutoff frequency,the auto- correlation length and the vertical ratio of texture as well as the density,protrusion height,inter-spacing,tip radius and cone angle of the grains,are obtained to qualitatively and quantitatively characterize the abrasive belt surface from the whole to the local.Finally,the P60,P80,P100 and P120 zirconia alumina abrasive belts are adopted to perform the experiments.The results show that (1) the abrasive belt surface is isotropic,and its auto-correlation degree descends with the increase of the grain size; (2) as the grain density increases,the height and distribution of the grains respectively tend to become more accordant and more uniform; (3) when the tip radius decreases,the cone angle ranges from 70° to 85°; and (4) the inter-grain spacing and the protrusion height of the grains follow an approximately normal distribution.

Key words: abrasive belt, surface topography, quantitative evaluation, grain protrusion height, inter-grain spacing