CNC machining of fasteners

With the rapid development of the Chinese economy in the 21st century, the consumption of electronic devices continues to increase. Especially with the increasing demand for mobile phones and special micro motors in China, the demand for precision shafts is also increasing, leading to many foreign companies entering China to build factories and import technology. In China, many precision CNC machining companies have gradually emerged and generated a certain scale. Spread throughout Zhejiang. However, there is a significant gap between domestic precision shafts and foreign enterprises in terms of accuracy, process, equipment, and technology, and most of the products are in the middle and low grades.

The precision specification for precision machining of five axis precision parts stipulates that the outer diameter of the precision shaft is between 0.5 and 3mm, and the length is generally less than 300mm. The outer diameter tolerance with strong precision is generally around 1 µ m, with special requirements reaching 0.4 µ m. Japanese companies can reach 0.1 µ m; The roundness requirement is 0.5 µ m, and the surface roughness value is Ra=0.025 µ m. Within this range, the radial runout requirement is 1 µ m or less. Precision shafts are usually customized non-standard parts based on customer needs or sample drawings. Precision shafts are used in many industries, such as micro motor parts, precision electronic parts, automotive parts, office system parts, household appliance parts, and electric tool parts.