The key to copper sheet stamping small spring pieces lies in high-precision molds and material treatment:
High-speed stamping: Utilizing high-speed punch presses (up to over 600 times per minute) to ensure production efficiency by 7.
Precision control: The thickness of the spring piece can be as low as 0.08mm, and the precision of the mold cutting edge needs to be controlled within 0.005mm to ensure the elasticity and contact stability of the spring piece.
Material selection: Brass (such as H62, H65) is often used in the manufacturing of spring pieces due to its excellent electrical conductivity and ductility.
2. Gold plating process
Gold plating can enhance electrical conductivity, corrosion resistance and oxidation resistance, and is suitable for high-demand electronic connectors
Pretreatment: including degreasing, pickling and activation to ensure the adhesion of the coating by 45.
Gold electroplating: By using the electrolytic deposition method, the thickness of the gold layer can be precisely controlled (such as 0.1 to 3μm), and the gold content can reach 99.99%.
Advantages
Reduce contact resistance and enhance the stability of signal transmission.
High-temperature resistant and anti-oxidation, suitable for precision components used for a long time 18.
3. Silver plating process
Silver plating is mainly used to improve electrical conductivity and welding performance:
Pretreatment: Similar to gold plating, the surface of the brass must be thoroughly cleaned.
Silver plating: It adopts cyanide silver plating or cyanide-free silver plating process, with uniform silver layer and fine crystallization.
Advantages
It has better electrical conductivity than gold plating and is less costly.
However, silver is prone to sulfidation and turning black, and anti-discoloration treatment (such as applying a protective agent) is
4. Application fields
Electronic connectors: such as mobile phone spring pieces, charging interfaces, etc., require high electrical conductivity and wear resistance.
Aerospace: Gold-plated spring pieces for high-reliability circuit connections 4.
Jewelry and decoration: Gold-plated/silver-plated discs are used for high-end ornaments and handicrafts 8.
