五年前,《机床》曾经概略地介绍过“六五”期间我所为满足我国四化的需要,在超精密加工领域做过的一些工作[1]。其做法就是为达到“超精密”的水平,把机床的精度做得更高,钻石刀刃磨得更锋利、平整,工件装卡的变形更小,环境控制更严等等。毫无疑问,还需要进一步提高“超精密” Five years ago, “machine tools” used to outline briefly some of the work I did in the field of ultra-precision machining to meet the needs of the four modernizations of our country during the period of the 6th Five-Year Plan [1]. Its approach is to achieve the “ultra-precision” level, the accuracy of the machine to do even higher, the diamond blade sharpened more sharp, flat, workpiece deformation less deformation card, the environment more stringent control and so on. There is no doubt that there is a need to further improve the “ultra-precision”