我厂22车间一台M1431万能外国磨床系长春第一机床厂60年代产品，使用30多年，精度严重下降。特别是内圆磨具，高精度滚动轴承损坏较快，平均每月更换两次，而且刚性差，进刀量小，加工零件的内孔难以满足工艺要求的精度。通过检测，该机床的液压系统、传动系统和床身导轨基本能 I plant 22 M1431 universal workshop a foreign grinder Changchun Machine Tool Works first 60 years of products, the use of more than 30 years, a serious decline in accuracy. In particular, the internal circular grinding tools, high-precision rolling bearing damage faster, an average of twice a month replacement, and poor rigidity, the amount of feed is small, the inner hole machining parts difficult to meet the accuracy requirements of the process. Through testing, the hydraulic system of the machine tool, transmission system and bed rail basic energy