阶梯轴的不同心度的检验在生产上常采用如图1所示的方法。当轴的一端在V形座上转动时,千分表在另一端的跳动量,可为其不同心值的两倍。但在1与2两部分的轮廓截形上,不可能没有导致不同心值测量误差的形状偏差。 导致测量误差的原因有两,即为部分1的中心在垂直平面上的移动及部 The test of different concentricity of the ladder shaft is often used in the production as shown in Figure 1. When one end of the shaft is rotated on the V-shaped seat, the amount of beating on the other end of the dial gauge may be twice the value of its different heart value. However, in the contour truncations of the two parts 1 and 2, it is impossible not to have the shape deviation which leads to the measurement error of different heart values. There are two reasons for the measurement error, namely the movement of the center of part 1 in the vertical plane and the part