New Progress in Precision Machining Technology

The machining accuracy of CNC metal cutting machine tools has been improved from the original wire level (0.01mm) to the micron level (0.001mm), and some varieties have reached about 0.05μm. For micro-cutting and grinding of ultra-precision CNC machine tools, the accuracy can be stably about 0.05μm, and the shape accuracy can reach about 0.01μm. The precision of special processing using light, electricity, chemical and other energy sources can reach nanometer level (0.001μm). Through the optimization of machine tool structure design, the ultra-finishing and precision assembly of machine tool parts, the use of high-precision full-closed-loop control and dynamic error compensation technology such as temperature and vibration, the geometric accuracy of machine tool processing is improved, and the shape and position error, surface roughness, etc. are reduced. , so as to enter the era of sub-micron and nano-scale ultra-finishing.