In the field of modern electronics and mechanical manufacturing, the nickel-plated connector body on the surface of copper parts customized by milling and turning precision machining is favored for its performance. Milling and turning precision machining gives copper parts precise shape and dimensional accuracy, and the subsequent surface nickel plating treatment is like putting on a multifunctional "protective armor" for it, greatly improving the comprehensive performance of the connector body from multiple dimensions.

As a commonly used basic material, copper has good electrical and thermal conductivity, but its chemical properties are relatively active and it is easily corroded by corrosive media in complex use environments. Although the copper parts after milling and turning have achieved a high level of machining accuracy, the chemical activity on their surface still makes them face many potential threats. When copper parts are exposed to the air, they will gradually react with oxygen to generate oxides such as copper oxide on the surface, which not only affects the appearance, but may also reduce their electrical performance to a certain extent. In an environment with high humidity or corrosive gases, the corrosion rate of copper parts will be significantly accelerated, and in severe cases, it may even cause the main structure of the connector to be damaged and unable to work normally.

At this time, the nickel plating process plays a key role. The nickel plating process is to deposit a uniform and dense nickel metal layer on the surface of the copper parts that have been precisely machined by turning and milling by electrochemical methods. This nickel plating layer is like a loyal guard, tightly attached to the surface of the copper parts, effectively isolating the copper matrix from the external environment. Nickel metal itself has high chemical stability. In common atmospheric environments, its reaction rate with oxygen is extremely slow, which can greatly inhibit the oxidation process on the surface of copper parts. In some industrial environments, the air may contain a small amount of corrosive gases such as sulfur dioxide and hydrogen sulfide. The nickel plating layer can resist the erosion of these gases, prevent the copper parts from rusting, and ensure the structural integrity of the connector body during long-term use.

The nickel plating layer also contributes to improving the surface hardness and wear resistance. Compared with copper, nickel has a higher hardness. After nickel plating, the hardness of the copper surface is significantly improved, which can better resist external friction and wear. In the actual use of the connector, frequent plugging and unplugging operations will cause the contact parts to bear greater friction. If the surface hardness is insufficient, scratches, wear and other phenomena are prone to occur, which in turn affects the contact reliability of the connector. The nickel plating layer can effectively reduce the degree of wear and extend the service life of the connector body due to its high hardness. Even under high-frequency use, the connector body after nickel plating can maintain good mechanical properties and reduce the probability of failure caused by wear.

From the perspective of electrical performance, the nickel plating layer is also of great significance. Although copper itself has conductivity, the good conductivity of the nickel plating layer further optimizes the electrical path of the connector. In the process of signal transmission, especially in high-frequency signal transmission, the stability of the signal is crucial. The nickel plating layer can reduce the resistance loss and signal distortion during signal transmission, ensuring that the signal is transmitted quickly and accurately. This has an irreplaceable role for some application scenarios that have extremely high requirements for signal transmission quality, such as high-speed data transmission, precision electronic instruments, etc. The nickel plating layer also has weldability. During the assembly process of electronic equipment, the connector needs to be welded to other electronic components. The nickel plating layer can provide a good foundation for welding, making the welding process more stable and reliable, improving the strength and conductivity of the welded joint, and ensuring the electrical connection performance of the entire electronic system.

The copper parts customized by milling and turning composite precision machining lay the foundation for the precise mechanical structure of the connector body, while the surface nickel plating has comprehensively optimized and improved it from multiple key aspects such as corrosion resistance, surface hardness and wear resistance, and electrical performance. The two complement each other and jointly create a high-performance connector body, which is widely used in many fields such as electronics, communications, automobiles, aerospace, etc., providing solid support for the development of modern science and technology. With the continuous advancement of materials science and processing technology, it is believed that this milling and turning composite processing combined with nickel plating will play a more important role in the future and promote the continuous innovation and development of related industries.