本文报导微英寸加工方面所取得的进展。微英寸加工的概念用表面光洁度、几何精度和尺寸精度来讨论。本文还讨论了为达到微英寸公差和光洁度,对超高精度机床的要求,包括主轴及溜板精度,减少振动,严格控制温度以及动平衡技术。另外,本文还介绍了在这些机床上使用单晶金刚石刀具的优越性。讨论了 Y-12工厂过去和现在的微英寸加工能力,及在不同机床上进行试验和应用的情况(注:1微英寸=0.025微米)。 This article reports on the progress made in micro-inch processing. The concept of micro-inch machining is discussed with surface finish, geometry accuracy, and dimensional accuracy. This article also discusses the requirements for ultra-high-precision machine tools to achieve micro-inch tolerances and finishes, including spindle and slide accuracy, vibration reduction, tight temperature control, and dynamic balancing. In addition, this article also describes the advantages of using single crystal diamond tools on these machines. The past and present micro-inch processing capabilities of the Y-12 plant were discussed and tested and applied on different machine tools (Note: 1 microinch = 0.025 micron).