各种轴套,内六角板手套筒,以及各类滚动轴承环,都是环件。这类零件在整个机械工业中,为数甚多,其中尤以轴承环的批量最大。在整套轴承的重量中,内外轴承环占70%以上。而在整套轴承环的生产成本中,又以材料成本为最高。因此,在轴承生产工艺中,迫切 A variety of bushings, hexagonal plate sleeve, and various types of rolling bearing rings, are ring. Such parts throughout the machinery industry, a large number, of which the largest bearing rings in volume. In the weight of the entire set of bearings, bearing rings within and outside the more than 70%. In the entire bearing ring production costs, but also the highest cost of materials. Therefore, the bearing production process, urgent