Since China listed ""equipment manufacturing industry"" as the national development strategy, China's equipment manufacturing industry has made rapid development. The manufacturing capacity of many large-scale equipment has reached to the world advanced level, and even become the world's top level. However, China's manufacturing industry is still backward on the whole, and its backwardness lies in the backwardness of precision manufacturing.

Ultra precision machining technology is an important supporting technology of modern high-tech war, the development foundation of modern high-tech industry and science and technology, and the development direction of modern manufacturing science.

The development of modern science and technology is based on experiment, and almost all the test instruments and equipment need the support of ultra precision machining technology. From macro manufacturing to micro manufacturing is one of the development trends of manufacturing industry in the future. At present, ultra precision machining has entered the nano scale, and nano manufacturing is the frontier subject of ultra precision machining. Developed countries all over the world attach great importance to it.

Development trend of precision machining

(1) High precision and high efficiency

High precision and high efficiency are the eternal theme of ultra precision machining. In general, fixed abrasive particle processing constantly pursues the processing accuracy of free abrasive particles, while free abrasive particle processing constantly pursues the efficiency of fixed abrasive particle processing. At present, ultra precision machining technologies such as CMP and EEM can obtain high surface quality and surface integrity, but they are guaranteed at the expense of machining efficiency. Although the ultra precision cutting and grinding technology has high machining efficiency, it can not obtain the machining accuracy such as CMP and EEM. It has become the goal of researchers in the field of ultra precision machining to explore machining methods that can give consideration to efficiency and precision. The emergence of semi fixed abrasive particle processing method reflects this trend. On the other hand, it shows the birth of composite machining methods such as electrolytic magnetic grinding and magnetorheological abrasive flow machining.

(2) Process integration

Nowadays, the competition among enterprises tends to be white hot, and high production efficiency has increasingly become the condition for enterprises to survive. In this context, there is a voice of ""grinding instead of research"" and even ""grinding instead of throwing"". On the other hand, the trend of using one equipment to complete multiple processes (such as turning, drilling, milling, grinding and finishing) is becoming more and more obvious.

(3) Large scale and miniaturization

In order to process large optoelectronic devices (such as mirrors on large celestial telescopes) needed in aviation, aerospace, aerospace and other fields, it is necessary to establish large-scale ultra precision processing equipment. In order to process micro devices (such as micro sensors, micro driving elements, etc.) required in the fields of micro electronic machinery and photoelectric information, micro ultra precision processing equipment is required (but this does not mean that micro processing equipment is necessary for processing micro workpieces).

Ultra precision machining technology is ushering in a prosperous era. Great progress has been made in ultra precision cutting, ultra precision grinding, ultra precision grinding and polishing technology. After machining, the surface accuracy of the workpiece can reach nano or sub nano level, and the machining methods are becoming more and more diversified. In the manufacturing of flowmeter sensor, in order to achieve high-precision measurement of products, precision machining technology ensures the machining accuracy of products