大型球面精密磨削的球度判别与误差在位补偿方法研究

提出了一种针对大型球面精密磨削、基于图像识别的球度误差判别和误差在位补偿新方法，主要原理是根据展成法球面磨削原理在球面上形成的磨削迹线形貌特征来判别球面的形状误差。根据球面形状误差，来判别砂轮磨削主轴旋转中心线与球体旋转中心线的几何位置偏差状况，对机床几何误差进行分析和数学建模，在此基础上，提出了展成法球面磨削球度误差的在位补偿方法，并设计了在位补偿装置。实验表明该方法可以有效提高大型球面磨削的形状精度。

Study of Method of Sphericity Evaluation and Error On-line Compensation for Large Spherical Precision Grinding

A new method based on image recognition is presented for the sphericity evaluation and error on-line compensation for large spherical precision grinding, The main principle of the proposed method is to determine the spherical shape error according to the spherical grinding trace morphology，and discriminate the geometric position deviation of grinding spindle rotation center line and the ball rotation center line according to the spherical shape error. The geometrical errors of machine tool are analyzed and mathematically modeled. On this basis, an on-line compensation device is designed, and an automatic compensation method of sphericity error is proposed. Experiments show that the proposed method can effectively improve the shape precision of large spherical grinding.