The 6-km ultra-high-precision RF cable for oxygen-free copper wire used for 3G communication produced by Chinalco Huazhong Copper (formerly Daye Copper Strip) Co., Ltd. was formally shipped, marking the fact that its 3G-free copper cable is not only of quality In terms of output, it ranks the leading position in the country, and has also created an industry record in terms of length.
3G communication requires that the transmitted signal be fast and stable without distortion. The high-precision and high-quality 3G RF cable copper strip developed by Chinalco Huazhong Copper Industry Co., Ltd. has a much lower oxygen content than 5PPM (1ppm for 1PPM), and its quality has reached or surpassed the international advanced level, ensuring 3G communication transmission. high quality. Although its output has steadily increased, the length of cable copper strips is generally less than 3,000 meters. With the acceleration of urbanization in China, the laying distance is often more than 3 kilometers. In order to reduce the length of copper strip welding and avoid signal attenuation, China Aluminum Huazhong Copper decided to develop an ultra-long belt with a length of more than 3 kilometers, and select the appropriate 6 km to tackle the target.
In research and development, China Aluminum Huazhong Copper Company continuously improved and improved the key processes of high-precision and long-term oxygen-free copper cable tape casting and processing, and solved the process of rolling, annealing, processing and finishing cutting of copper cable tapes. Various problems affecting the strip, in particular, solve the problem of the influence of the intermediate annealing process on the inside of the strip, and control the tensile strength and yield strength of the strip to the optimal range, and finally succeeded.
At present, Chinalco Huazhong Copper Company is actively applying for such national patents for the production of high-precision and long-duration oxygen-free copper tapes.