Electronic products: intelligent direct driving electronic lock gearbox, automatic hair curler gearbox, intelligent mouse (Microsoft) gearbox, intelligent electric toothbrush gearbox, headphone take-up module gearbox, smartphone photo printer (Samsung) gearbox, small Q robot overall solution (Tencent qrobot robot gearbox), oppo N3 electric rotating camera, etc.
The traditional machining method (common machining) is the same as the precision and ultra precision machining methods. With the adoption of new technology, new technology, new equipment, new testing technology and instruments, the machining accuracy is constantly improving.
The continuous improvement of machining accuracy reflects the development trend of material segmentation level from macro to micro world. With the development of time, it is relatively easy to achieve the machining accuracy that was originally thought to be difficult. Therefore, general machining, precision machining and ultra precision machining are only relative concepts, and the boundaries between them change with time. Diamond cutting is the typical representative of precision machining and ultra precision machining.
Take diamond cutting for example. The arc radius of its cutting edge has been developing in a smaller direction. Because its size has a direct impact on the roughness of the surface to be machined, which is directly related to the reflectivity of the optical mirror, the reflectivity of the instrument and equipment is required to be higher and higher. For example, the reflectivity of the laser gyro mirror has been proposed to reach 99.99%, which requires the diamond tool to be sharper. In order to carry out the experiment of cutting very thin, the aim is to reach the thickness nm of the chip, and the radius of the cutting edge arc should approach 2.4nm. In order to achieve this height, the diamond grinder has changed the traditional structure. The spindle bearing is supported by air bearing, and the end face run out of the grinding disk can be corrected on the machine tool, so that the end face run out is controlled below 0.5 μ M.
In the aspect of cutting tools, diamond grinding wheel is used to control the back draft and feed. In the ultra precision grinding machine, grinding can be carried out in a ductile way, that is, nano grinding. Even the surface of glass can obtain optical mirror. From the perspective of long-term development, manufacturing technology is the main direction and strategic decision-making for the development of national economy of all countries in the world, one of the important means for a country's economic development, and also a long-term plan for a country's independence, prosperity, sustained and stable economic development, and leading in Science and technology. The development of science and technology also puts forward higher requirements for precision machining and ultra precision machining technology. From the lens of astronomical telescope to the micro and nano size parts of micro engineering and micro machinery required by the linewidth μ m of large-scale integrated circuit, the maximum size accuracy of the parts, regardless of the size, tends to be nano; the shape of the parts is becoming increasingly complex, and various aspheric surfaces are very typical geometric shapes at present. Micromachining technology brings a new trend for ultra precision manufacturing technology. Its micro degree makes the traditional manufacturing technology face a new challenge, promotes the improvement of technical performance of various products, and the development process presents a spiral cycle development, which directly contributes to the progress of science and technology and human civilization. The pursuit of high quality, miniaturization, high reliability and high performance of products has made the ultra precision machining technology develop rapidly and become an important part of modern manufacturing industry
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