Future smart manufacturing, one-click spraying - automatic spraying machines lead the new industrial revolution
The spraying of bolts and nuts is based on many considerations, mainly including corrosion protection, enhanced wear resistance, improved tensile properties and improved fastening effect. The following are some specific necessities:
1. **Corrosion resistance**: Bolts and nuts may be affected by corrosion, wear and oxidation in specific working environments, which may reduce their performance. Spraying coatings, such as galvanizing, hot-dip coating, ceramic coating or organic coating, can effectively prevent oxidation and corrosion and extend service life.
2. **Wear resistance**: The coating can form a protective film with higher hardness on the surface of the bolt, reduce contact friction with other surfaces, and improve wear resistance, which is especially important in high load and high friction environments.
3. **Tensile performance**: The coating increases the surface hardness of the bolt, improves its tensile properties, and prevents the bolt from breaking and deforming when subjected to high tension and high pressure.
4. **Tightening effect**: The coating reduces the friction coefficient on the bolt surface, making it easier for the bolt to rotate during the fastening process to achieve the ideal fastening force, improve work efficiency and ensure the stability of the fastening connection.
5. **Prevent loosening**: In some occasions that require high strength and anti-loosening, such as automobiles, aerospace, etc., pre-coated screws can provide uniform and consistent glue coating to ensure the tightening effect.
6. **Protective process**: During the electrophoresis and topcoat spraying process, if no protective measures are taken on the nuts, multiple layers of paint may be attached, resulting in the inability to lock the bolts directly, requiring tapping and cleaning, which may cause problems such as bolt breakage. Therefore, appropriate protective processes are necessary.
7. **Application in special environments**: In a corrosive environment, bolts and nuts may rust together, making disassembly difficult. Applying materials such as molybdenum disulfide can provide anti-corrosion and reduce the difficulty of disassembly.
8. **Adapt to special equipment requirements**: For high temperature and high pressure equipment, ordinary paint may not be applicable, and special paints need to be sprayed to meet the equipment requirements.
9. **Surface pretreatment and treatment**: The surface pretreatment and treatment process of bolts, studs, and nuts, such as sandblasting, is part of the anti-corrosion treatment, which can improve the adhesion and anti-corrosion effect of the coating.
10. **Coping with high salt and high humidity environments**: In harsh environments such as high salt and high humidity, using stainless steel screws and nuts and performing appropriate spraying treatment can ensure the reliability of the equipment.
In summary, the spraying treatment of bolts and nuts is to improve their performance and reliability in various environments and ensure the stability and safety of mechanical equipment.
