Common precision machined parts include instrument parts, and the internal structure accuracy of watch is very high. Gear shaft, internal structure of micro engine and places with high transmission accuracy are all.

Machining method with machining accuracy up to 1 micron. Precision machining is realized by using precision machine tools, precision measuring tools and meters under strictly controlled environmental conditions. Dalian precision machining precision reaches or exceeds 0.1 micron, which is called ultra precision machining. In the aerospace industry, precision machining is mainly used to process precision mechanical parts in aircraft control equipment, such as precision mating parts in hydraulic and pneumatic servo mechanisms, gyroscope frames, shells, air and liquid floating bearing components and floats. The structure of aircraft precision parts is complex, the stiffness is small, the precision is very high, and the proportion of difficult to process materials is large.

The process effect of precision machining is:

① The geometric shape and mutual position accuracy of parts reach micron or angular second level; ② The boundary or feature dimension tolerance of parts is less than micron;

③ The micro unevenness of part surface (average height difference of surface unevenness) is less than 0.1 micron;

④ Mutual fittings can meet the requirements of combining force;

⑤ Some parts can also meet the requirements of accurate mechanical or other physical characteristics, such as the torsional stiffness of the torsion bar of the float gyroscope, the stiffness coefficient of the flexible element, etc.

Now the application of mechanical parts processing is more and more, and the scope of parts in these applications is also very wide. In any case, improving man-machine safety and driving comfort is convenient for the driver's operation and technical maintenance, which not only improves the driver's working conditions, but also improves the production efficiency. Some countries have set new standards for vibration, noise, exhaust emission and anti rolling and falling objects of construction machinery. The processing scope and accuracy of mechanical parts must also be high. The reason is that customers have high requirements for quality. Do you think customers will choose the processing of mechanical parts with poor quality? From the perspective of our choice of products, Will choose good products, which is the idea of many people now.