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Research of the influence of geometrical factors on rotary accuracy of high-precision spindle

机译：几何因素对高精度主轴旋转精度影响的研究

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As an important component of machine tools, spindle is the end part directly determining the quality of machined surfaces. It is essential to guarantee the spindle rotary accuracy for improving the machining quality. Spindle rotary accuracy is determined by bearing accuracy and other components' geometric error. Firstly, a 5-DOF bearing model is applied to describe the position and orientation deviations between inner ring and outer ring. It is also used to describe bearings' rotational error. Secondly, the distance of curvature centers of inside and outside raceways is calculated when the position and orientation of inner ring changes, in consideration of the dimensioned and form errors of the inner, outer rings and balls. Small Displacements Torsor (SDT) is used to describe machining error of spindle. Finally, geometric factors such as shaft machining error, bearing's preload and the assembly angle are discussed.
机译：作为机床的重要组成部分，主轴是直接确定机加工表面的质量的端部。必须保证主轴旋转精度，以提高加工质量。主轴旋转精度是通过轴承精度和其他组件的几何误差确定的。首先，应用5-DOF轴承模型来描述内圈和外圈之间的位置和取向偏差。它还用于描述轴承的旋转误差。其次，考虑到内圈改变的尺寸和形成内部，外环和球的误差，计算内外滚道的曲率中心的距离。小型位移纹oror（SDT）用于描述主轴的加工误差。最后，讨论了诸如轴加工误差，轴承预载和组装角度的几何因素。

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