细粒度金刚石砂轮表面磨粒识别研究

准确地评价砂轮表面形貌对磨削机理研究、磨削过程优化、磨削过程的建模与仿真等具有重要意义,而准确的磨粒识别是砂轮形貌测量和评价的关键. 对超精密磨削所用细粒度金刚石砂轮磨粒粒径的分布特点和砂轮表面上磨粒的轮廓波长进行了分析. 从采样间隔和取样面积的角度对金刚石砂轮表面三维形貌测量仪器的选择进行了探讨. 应用数字滤波消除砂轮表面三维数字信息中的高频分量,然后提取金刚石磨粒的几何特征,提出了依据磨粒轮廓频率特征、磨粒间距和磨粒曲率半径识别金刚石磨粒的方法. 采用基于扫描白光干涉原理的三维表面轮廓仪?3000金刚石砂轮表面形貌进行了测量,对砂轮表面中包含的金刚石磨粒进行了识别,实验结果证明所提出的磨粒识别方法合理有效.

Recognition of diamond grains on surface of fine diamond grinding wheel

Accurate evaluation of grinding wheel surface topography is indispensable for the investigation of grinding principle, optimization, modeling and simulation of grinding process, which, to a large extent, depends on accurate recognition of abrasive grains from the measured wheel surface. Detailed analyses of the grain size distribution characteristics and the grain profile wavelength of fine diamond grinding wheel used for ultra-precision grinding are presented. The requirements of spatial sampling interval and sampling area for instruments to measure the surface topography of diamond grinding wheel are discussed. In order to recognize the diamond grains, digital filtering is used to eliminate high frequency noise from the measured 3D digital surface and then the geometric characteristics of diamond grains are extracted. A method based on the grain profile frequency characteristics, the distance between two adjacent diamond grains and the diamond grain curvature is proposed to recognize the diamond grains. A 3D non-contact profiler based on scanning white light interferometry is used to measure the surface topography of a # 3000 resin bonded diamond grinding wheel, and then the diamond grains are recognized. The experimental results show that the newly proposed method is reasonable and effective.