Precision mass production equipment was put into use in a certain enterprise

Traditional machining methods (ordinary machining) are the same as precision and ultra-precision machining methods.With the adoption of new technology, new process, new equipment and new testing technology and instrument, its machining accuracy is constantly improving.

The continuous improvement of machining accuracy reflects the development trend of material segmentation from macro to micro world.As time goes on, machining accuracy that was previously considered difficult to achieve becomes relatively easy.Therefore, ordinary machining, precision machining and ultra-precision machining are only a relative concept.The boundaries change over time.Diamond cutting is the typical representative of precision cutting and ultra-precision machining.

Take diamond cutting as an example.The arc radius of the blade edge has been developing in a smaller direction.Because its size directly affects the roughness of the processed surface and is directly related to the reflectivity of the optical mirror, the reflectivity of the instrument is more and more demanding.For example, the reflectivity of laser gyro mirrors has been proposed to reach 99.99%, which inevitably requires diamond cutting tools to be sharper.In order to conduct the ultra-thin cutting test, the goal is to reach the chip thickness nm, and the tool edge arc radius should approach 2.4nm.In order to achieve this height, diamond grinding machine changed the traditional structure.The spindle bearing is supported by air bearing, and the end face runout of the grinding disc can be corrected by itself on the machine, so that the end face runout can be controlled under 0.5 micron.

In terms of cutting tools, diamond grinding wheel is adopted to control the amount of cutting and feed. Ductile grinding, namely nano grinding, can be carried out on ultra-precision grinding machine.An optical mirror can be obtained even on the surface of glass.2 precision processing and ultra-precision processing from the perspective of long-term development, the development trend of manufacturing technology is the current world development the main direction and strategy of the national economy, is one of the important means of a national economic development, is also a national independence, prosperity and economic steady development, science and technology leading the long-term strategy.The development of science and technology also puts forward higher requirements for precision machining and ultra-precision machining technology.From the large to the celestial telescope lens, small to the large scale integrated circuit width micron micro engineering and micro mechanical size parts, regardless of the size, the maximum dimensional accuracy is close to the nanometer;The shape of the parts is becoming more and more complicated, and various aspheric surfaces are very typical geometric shapes at present.Micro - mechanical technology for ultra-precision manufacturing technology to attract a new trend?Its fineness makes the traditional manufacturing technology face a new challenge, promotes the improvement of the technical performance of various products, and the development process presents spiral circular development, directly contributing to the progress of science and technology and human civilization.With the pursuit of high quality, miniaturization, high reliability and high performance, ultra-precision machining technology develops rapidly and has become an important part of modern manufacturing industry