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为了提高偏心轴的测量精度,提出采用二次投影法对偏心轴进行检测与分析。分析了二次投影法的测量原理。通过采用光学影像测量机对偏心轴进行二次投影测量,得到偏心轴在相互垂直的两个平面上的投影数据;对投影数据进行处理,得到偏心轴各轴段中心线端点在空间坐标系中的坐标值,从而进一步建立起各个轴段中心线在空间中的真实矢量。根据得到的矢量数据可以提取出对偏心轴结构进行分析所需的各种参数,从而能够对偏心轴的偏心距和同轴度等加工质量进行合理分析。研究表明,采用二次投影法可以大幅度提高偏心轴的测量精度。
In order to improve the measurement accuracy of eccentric shaft, the secondary projection method is proposed to detect and analyze the eccentric shaft. The principle of the quadratic projection method is analyzed. By using the optical image measuring machine to carry out secondary projection measurement on the eccentric shaft, the projection data of the eccentric shaft on two planes perpendicular to each other are obtained; and the projection data are processed to obtain the end point of the center line of each shaft section of the eccentric shaft in the space coordinate system Of the coordinate values, so as to further establish the center line of each axis in the real space vector. Based on the obtained vector data, various parameters required for the analysis of the eccentric shaft structure can be extracted, so that the processing quality such as eccentricity and coaxiality of the eccentric shaft can be reasonably analyzed. The research shows that the quadratic projection method can greatly improve the measurement accuracy of eccentric shaft.