C620-1车床大皮带轮与主轴箱 I 轴的配合为花键联接。在使用中经常发现 I 轴花键外径表面有逐层剥蚀现象,使花键外径迅速缩小,出现松动现象,影响机床继续使用。为此,我们把皮带轮轮孔中原(?)40长20的空位,改为与花键孔外径尺寸精度 C620-1 lathe with a large pulley and spindle box I-axis spline connection. In use, it is often found that the surface of the I-axis spline has a layer-by-layer erosion phenomenon, which causes the outer diameter of the spline to be narrowed rapidly and loosening, affecting the continuous use of the machine tool. To this end, we put the pulley wheel hole in the original (?) 40 long 20 vacant, and the spline hole diameter size accuracy