The rolling function components, such as ball screw pairs and rolling guide pairs, are essential elements in modern machinery. They offer advantages like low friction, flexible drive, high speed, and high rigidity, making them vital for the development of the equipment industry and the enhancement of national defense and economic strength. Despite their small size, these components play a crucial role in industrial applications, especially in power transmission systems where they significantly reduce friction.
In the context of the national economy's new development phase, CNC machine tools have become one of the most sought-after equipment in the market. These machines consist of several key parts: the mainframe, the CNC system, the rolling elements, and the mechanical base. In this structure, the CNC system acts as the brain and nervous system, while the rolling functional components serve as the blood vessels, ensuring smooth operation and efficiency. As such, rolling elements are considered fundamental building blocks of CNC machine tools.
According to data from the China Machine Tool Industry Information and Rolling Components Industry Association, the domestic demand for rolling elements reached 400 million yuan in 2002, with about 300 million yuan produced domestically and 100 million yuan imported. By 2003, the total demand was expected to exceed 500 million yuan. With the national "Fifteenth Five-Year Plan" aiming for an average annual growth rate of 15%, by 2006, the domestic demand for rolling elements is projected to surpass 1 billion yuan.
Rolling functional components and CNC machine tools are closely interdependent. To develop these components effectively, it is essential to enhance manufacturing capabilities. The level of technology in production equipment, the degree of numerical control, and the advancement of processing techniques directly influence the quality and efficiency of rolling elements. Advanced manufacturing techniques, such as CNC machining and technological breakthroughs, are critical to improving the performance of these components.
In summary, upgrading the equipment in the rolling functional components industry is a top priority. Additionally, the industry must improve its responsiveness and provide more high-tech products to the market, with a strong emphasis on computer and information technologies. These technologies help shorten product development cycles, increase resource utilization, reduce costs, and enhance market adaptability.
Based on existing networks and CAD/CAM applications, companies should focus on establishing an ERP information management system, strengthening enterprise informatization, and eventually implementing a comprehensive manufacturing and quality control system driven by advanced technology.
High-speed, high-precision, and high-rigidity rolling elements are the current research and development goals. For instance, there is growing demand for rolling elements capable of operating at 40–60 m/min, whereas domestic products currently operate at 20 m/min. The next development stage aims to achieve high-speed linear guides capable of 80 m/min. High precision remains a continuous pursuit, with domestic ball screws reaching P1 accuracy, meeting most needs in precision machining centers and EDM/WEDM applications.
However, compared to foreign standards, there is still a one-grade gap in accuracy, especially for large rolling elements over 3 meters. To close this gap, the industry must adopt new technologies, processes, and materials. An international standard process involves replacing traditional grinding methods with rolling and rotary milling, which improves precision, reduces deviation, and increases production efficiency.
Zhang Jianping, director of Nanjing Technology Equipment Manufacturing Plant, expressed confidence in expanding the rolling component industry, citing a solid foundation and self-reliance in R&D. The factory has been a pioneer in developing and manufacturing rolling elements for nearly 50 years, equipped with state-of-the-art production and testing facilities, and holds a 50% market share in ball screws with over 85% customer satisfaction.
With ongoing technological upgrades and the introduction of advanced equipment, the industry is poised for further growth. Through joint efforts across the machine tool sector, the goal of achieving high-precision, high-quality, and high-performance rolling components can be realized, making the Chinese rolling component industry a shining pearl in the industrial economy.
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