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M7120A磨床采用短三瓦多油楔动压轴承,这种轴承可以随载荷的增加而提高承载能力,且油楔愈薄刚度愈高,所以,要求轴与轴瓦的间隙要小,一般为0.008～0.01,而且主轴与磨头壳体内孔不同心度不大于0.01。该磨床前后共六片轴瓦,调整比较困难,一般采用工艺套调整。但由于主轴的尺寸在使用和修理中不断减少,故原工艺套往往不能适用。我们在修理中,先分别精确地测量修复后的主轴轴颈尺寸d和磨头壳体内孔D,然后,根据h。=
M7120A grinding machine with a short three-watt multi-wedge hydrodynamic bearings, this bearing can increase the load carrying capacity, and the wedge thinner the higher the stiffness, therefore, requires a small gap between the shaft and bearing, usually 0.008 ~ 0.01, and the spindle and grinding head housing bore concentricity is not greater than 0.01. The grinder before and after a total of six bearings, adjust more difficult, the general use of technology sets to adjust. However, as the size of the spindle in the use and repair continue to decrease, so the original technology often can not apply. We are in the repair, the first accurate measurement of the spindle shaft size after repair d and grinding head hole D, then, according to h. =