内球体半径的测量是比较麻烦的,不能满足加工过程中测量的需要。本文介绍一种简单的检具,用它可以简便迅速地测量内球体半径,而且结果稳定、精度较高。一、内球体半径的测量原理在一几何内半球体中放入一圆片,不论圆片在球内任何位置,球壁顶点至此圆片的距离为一定值h(图1)。通过球壁顶点作圆片的垂直平面,则此垂直平面与内球体的截形乃是一圆弧,且通过顶点垂直弦平面的直线AA′必通过球心O,此 The measurement of the radius of the inner sphere is troublesome and does not meet the needs of the measurement during machining. This article describes a simple gage, with which the radius of the inner sphere can be measured easily and quickly, with stable results and high accuracy. First, the measuring principle of the radius of the inner sphere In a geometric hemispherical body into a wafer, regardless of the wafer anywhere in the ball, the vertex of the wall to the distance of the wafer for a certain value h (Figure 1). Through the vertex of the wall as the vertical plane of the wafer, the cross section of the vertical plane and the inner sphere is an arc, and the line AA ’passing through the vertical chord plane of the vertex will pass through the center O of the sphere