With the development of automation of electronic products and office supplies, the application field of micro-precision shaft processing has been expanding. The development of micro-motor industry in particular has promoted the development and production of micro-motor shaft in China.
With the development of production of video recorders in China in the 1990s, especially the establishment and commissioning of joint ventures with China, the development of precision micro-axes for video recorders has been promoted. In recent years, more and more types of precision micro-axes have been used in this field due to the development of computer, communication and office modernization. Three or five kinds have developed to hundreds of kinds at present, and their forms have also changed from straight rod optical axis to slot, milling flat, knurling, drilling and hobbing.
Generally speaking, the diameter range of precision micro-axis processing is roughly: from 12mm to 6mm, and the length is from 10mm to 60mm. However, with the continuous miniaturization and high performance of products, the size and precision of precision micro-axis have changed a lot compared with ten years ago, and the diameter and length range have expanded to 0.6mm, respectively. Meters to 8mm and 4mm to Wmm. Diameter tolerance is changed from 6 microns to 1 micron, roundness is less than 0.5 microns, straightness is less than 0.5 microns, and surface roughness is less than RmaXO.3S.
Miniature precision shafts are widely used in many fields, and more than half of the world's precision shafts are produced in Asia, and China accounts for 1/4 of them. Therefore, the production of domestic precision shafts has made a great contribution.