Precision parts processing technology is the key bottleneck technology of advanced equipment manufacturing. Nanometer precision is known as the "pearl on the crown" of ultra precision processing technology. In the past, due to the backward processing technology of optical parts in China, it was impossible to process optical parts with large diameter, high precision and complex surface shape, which seriously restricted the technological progress in related fields.
In the mold manufacturing enterprise, in addition to the process means of slow wire cutting and cutting with more repairs, the other method used in the finishing stage is grinding on the basis of heat treatment after semi finishing. In this stage, many technical parameters such as deformation, internal stress, shape tolerance and dimensional accuracy of parts should be controlled. In the specific production practice, there are many difficulties in operation, but there are still many effective experience methods worth learning from.
The origin of precision and ultra precision machining technology can be traced back to the primitive society in a certain sense: when primitive humans learned to make stone tools with a certain shape and sharp edge, it can be considered that the most primitive manual grinding process appeared; After the Bronze Age, people made various kinds of copper mirrors with smooth surfaces, which were made by grinding and polishing. However, in modern times, precision machining in its true sense emerged. The most typical example is the invention of precision boring machine. Therefore, the development of domestic ultra precision machining technology basically starts from the research of ultra precision machining equipment.
Since the foundation of ultra precision machining equipment is ultra precision components, including aerostatic spindles and guides, hydrostatic spindles and guides, etc., various units also take ultra precision basic components and natural diamond tools for ultra precision machining as breakthrough points, and have made some progress very soon.