【摘要】 采用激光位移传感器检测氧化铝砂轮的三维形貌,获取砂轮局部表面形貌模型,评价了多粒度号的氧化铝砂轮的特性参数。对磨削加工前后,不同粒度号砂轮表面形貌的磨粒密度、出刃高度、有效出刃高度等特性参数进行研究,并拟合出氧化铝砂轮出刃高度分布曲线。结果表明,砂轮单位面积上的磨粒数、磨粒高度以及磨粒间距均具有不均匀性。相同粒度号的砂轮磨粒密度变化与组织号相符,相同粒度号的砂轮硬度与磨削前后的磨粒密度差值成反比。磨削前后的磨粒出刃高度分布均近似为正态分布。有效出刃高度与砂轮的粒度号成反比,与砂轮硬度成正比。更多还原

【Abstract】 A laser displacement sensor was used to detect the three-dimensional topography of alumina grinding wheel and a local surface topography model was established with the data. Multiple grinding wheels were evaluated through different wheel topography characterizationparameters. The grains density,grains protrusion height,effective protrusion height before and after grinding of different types of grinding wheel were researched and protrusion heightdistribution curvesof alumina grinding wheel were fitted. It is shown that grains number per area,grains height and grains gap are uneven.Thegrinding wheels that have biggerstructure number will have smaller grains density.When the grinding wheel’s hardness increases,the grinding wheel’s wear rate will decrease.The results also show that the protrusion height distribution of alumina grinding wheels before and after grinding is more accord with normal distribution.Effective protrusion height is inversely proportional to the particle number and it is proportional to the wheel’s hardness.更多还原