Bearings are the fundamental components of mechanical equipment, known as the "joints" of machinery, and are important foundational components in the equipment manufacturing industry. Bearings have been continuously developing with the process of mechanization and automation in modern industry. In modern industry, bearings are widely used in various fields such as transportation machinery, engineering machinery, precision machine tools, instruments and meters, and play an important role in the development of the world's mechanical industry and other industries. Today, the editor will introduce the development trend and existing problems of machine tool bearings.
1、 The Development Trend of Machine Tool Bearings
After years of development, although the scale of China's bearing industry has become very large, most of it is concentrated in the low-end. In the field of high-end bearing manufacturing, there is still a considerable gap between China and developed countries, and the development speed of high-end bearings cannot keep up with the development speed of the main engine.
Machine tools are the foundation of the equipment manufacturing industry, and spindle bearings, as the basic components of machine tool bearings, have a direct impact on the speed, rotational accuracy, rigidity, vibration resistance, cutting performance, noise, temperature rise, and thermal deformation of the machine tool, thereby affecting the accuracy and surface quality of the processed parts. For spindle supports of high-speed and high-precision machine tools such as CNC machines and machining centers, P4 and above ultra precision bearings need to be selected. With the rapid development of CNC technology, "composite, high-speed, intelligent, precise, and environmentally friendly" has become the main trend in the development of machine tool industry technology today. Among them, high-speed machining can effectively improve the machining efficiency of machine tools and shorten the machining cycle of workpieces. This requires the machine tool spindle and its related components to adapt to the needs of high-speed machining.
2、 Problems in the Development of Machine Tool Bearings
With the support of the country for the equipment manufacturing industry and the continuous efforts of domestic machine tool manufacturers themselves, China's machine tool manufacturing technology has made significant progress, and outstanding progress has been made in the high-speed, high-precision, and appearance of machine tools. However, there is still a significant gap between domestic products and advanced foreign products, mainly reflected in speed, accuracy, multifunctional composite processing performance, and design concepts. The main gap among them is reliability and accuracy retention, which is also difficult to solve in a short period of time.
At the same time, the high-performance key functional components of machine tools have long relied on imports, which is related to the general lack of systematic research and eager pursuit of basic common and applied technologies by domestic machine tool manufacturers. On the other hand, it also reflects the lack of investment in basic common and key core technology research and development by the country and production enterprises, resulting in a long-term lack of effective technical support for host and functional component enterprises. To completely solve this problem, it is necessary to increase financial support for the development of high-tech products and key functional components under the unified planning and guidance of the country, organize research institutes and machine tool related production enterprises to form a "joint force", and quickly form a high-level machine tool design and functional component manufacturing system, striving to narrow the gap with advanced foreign machine tool products in a short period of time, Realizing the transformation from a machine tool powerhouse to a machine tool powerhouse.