我厂套圈车加工精整工序系采用CA9220、C7632等液压机床,由于机床原设计选用的电器元件质量差,因而在精整加工中出现倒角座标及内、外为尺寸不稳定、尺寸超差、返修品、废品很多。为了提高产品质量,我们自79年以来先后对C7632、CA9220机床进行了技术改造,取得了显著的效果。现 I ring ring machining process using CA9220, C7632 and other hydraulic machine, due to the original design of the machine tool used in the poor quality of electrical components, and therefore appear in the finishing chamfer coordinates and internal and external dimensions is not stable, the size Out of tolerance, repair products, a lot of waste. In order to improve the quality of our products, we have carried out technological innovation on the C7632 and CA9220 machine tools since 1979 and achieved remarkable results. Now