我厂从东德引进的一台 BFT-63型卧式镗床,自1969年安装使用以来,精度严重下降,无法保证产品的精度要求。为此,我们于1984年将该机床进行了大修。大修后,机床恢复了出厂时的精度标准,效果较好,现就主轴组精度的修复方法介绍如下.一、修前的精度检查修理前,我们对 BFT-63型卧式镗床的各项几何精度进行了全面检查。其中,主轴组的几项主要精度如下:(1)主轴回转精 Our factory introduced a BFT-63 horizontal boring machine from East Germany. Since the installation and use in 1969, the accuracy dropped seriously and the precision requirement of the products can not be guaranteed. To this end, we made a major overhaul of the machine in 1984. After the overhaul, the machine tool returned to the factory accuracy standards, the effect is better, now on the spindle group accuracy of the repair methods are described below.Pre-repair before the accuracy of repair, we BFT-63 horizontal boring machine geometry The accuracy was checked thoroughly. Among them, the spindle group of several major precision as follows: (1) spindle rotation fine