我厂大修2A635型(1970年苏联制造)镗床时,发现工作台面对主轴中心线的平行度在1600mm长度内误差达0.8mm。分析其原因是该机床经过20多年的使用,致使工作台上滑座近主轴端的导轨面,其磨损量大于另一端导轨面,造成工作台面右低左高。同时,使传动上滑座的蜗杆副啮合间隙减小,造成走刀传动不均匀,并在快速走刀时引起较大振动。为此,我们采用F-4软带阶梯粘接的方法进行了修复。具体方法如下: 一、F-4分段粘接厚度的确定 When our factory overhaul the 2A635 boring machine (made in the Soviet Union in 1970), we found that the parallelism of the work table to the spindle centerline is within 0.8mm of the length of 1600mm. Analysis of the reason is that the machine tool after 20 years of use, resulting in the table near the spindle end of the slide rail surface, the wear greater than the other side of the rail surface, resulting in the work surface right low left. At the same time, so that the worm gear on the slide seat meshing gap is reduced, resulting in uneven feed drive, and in the fast pass caused a large vibration. To this end, we use the F-4 soft-ladder adhesive method was repaired. Specific methods are as follows: First, the F-4 section bonding thickness to determine