机床导轨在使用过程中,由于使用、维护不当,产生划伤或咬毛,需要进行修复。我们将“无槽化学镀铜”和“锡铋合金钎焊”工艺结合起来,修复机床平置导轨,取得较好效果。它具有:焊前导轨不必进行预热,不必开焊接坡口,在原来损伤的状态下就进行焊接,而任何细小的沟痕缺陷都可以焊得上,而且焊得牢固可靠。焊接容易、方法简便、焊后手工刮削加工很容易、效率高、修复快。具体工艺如下:一、焊前准备焊条:将50％的铋、50％的锡(纯度要高,不能用焊锡代替)破碎成小块,先将锡放入铁质容器中,加热熔化,再加入铋,使之熔化并搅拌均匀,然后,倒入稍微倾斜的角铁V槽中,待冷凝后,截成长度约 Machine tool rails in use, due to use, improper maintenance, resulting in scratching or biting, need to be repaired. We will be “slotless electroless copper plating” and “tin-bismuth alloy brazing” process combined to repair flat-rail machine tool, and achieved good results. It has: Pre-welding guide rail without preheating, do not have to open the welding groove, in the original state of the state of damage on the welding, and any small groove defects can be welded on, and the welding is solid and reliable. Easy welding, the method is simple, manual scraping after welding processing is very easy, high efficiency, fast repair. The specific process is as follows: First, the welding rod preparation: 50% of the bismuth, 50% of the tin (purity is high, can not be replaced by solder) broken into small pieces, the first tin into the iron container, heated to melt Add bismuth, make it melt and stir well, then, pour into a slightly inclined angle iron V tank, to be condensed, cut into about length