中心孔的不同轴度,是以两中心孔的定位锥面实际轴线11—11和l2一12人的中点a1和a2的连线L—L作为理论轴线(图1),与中心孔实际轴线靠近大端的偏差值来表示。 由于主轴两端中心孔不同轴度的存在,将导致顶针的一边与中心孔的大端接触,而另一边却与小端接触。这使顶针和中心孔的接 The center axis of the different axis, the center of the two concentric holes positioning hole 11-11 and l2 a 12 and the midpoint a1 and a2 of the line L-L as the theoretical axis (Figure 1), and the center hole The actual axis is close to the big end of the deviation value to represent. Due to the existence of different concentricity of the central hole at both ends of the spindle, one side of the thimble will be brought into contact with the large end of the central hole and the other end with the small end. This connects the thimble to the center hole