CM 6125车床的车头前后轴承系铜瓦。过去一直按照老的工艺方法靠人工刮研,劳动强度大,效率低,成为生产上急需突破的关键。为解决这一老大难问题,济南第一机床厂125车间组成三结合技术攻关小组,根据精车铜瓦内孔的原理,决定以镗代刮。经过试验,镗后表面光洁度达 10以上,锥度、椭 CM 6125 lathe front and rear bearings are copper. In the past, we have to rely on the old craft methods to rely on manual scraping, which results in labor intensiveness and low efficiency, which has become the key to urgent breakthroughs in production. In order to solve this long-standing problem, the first workshop of Jinan Machine Tool Plant 125 combines three key technical research groups. According to the principle of fine-machined copper-bronze inner hole, it is decided to use boring and scraping. After testing, boring surface finish of 10 or more, taper, elliptical