CNC machine tool consists of machine tool body, transmission system and CNC system, and the key functional components occupy more than 50% of the cost. The performance of these key functional components directly determines the overall performance of CNC machine tools. However, at present, China’s CNC systems and transmission systems are mostly dependent on imports, part of the core functional components, although the domestic is making an effort, but still faces many challenges.
CNC system as a CNC machine tool “brain”, controlling the movement of the machine tool and the machining process. At present, foreign brands dominate the CNC system market, its technology is mature, high stability. Domestic enterprises in the research and development of CNC system has made some progress, but in terms of precision, reliability and foreign brands there is still a gap. Transmission system is responsible for transferring power to various components of the machine tool, and its performance directly affects the precision and efficiency of the machine tool movement. Similarly, foreign brands have obvious advantages in the field of transmission system, domestic enterprises need to continuously improve the technical level, in order to realize the localization of substitution.
Spindle as one of the key functional components of CNC machine tools, the quality of the machine tool has a critical impact. With the continuous upgrading of end demand, electric spindle has gradually become the trend to replace mechanical spindle due to its high-speed and high-precision features. However, the localization process of electric spindle is limited by many factors.
Bearing is one of the core components of the electrical spindle, at present, China’s high-end bearings are mainly dependent on imports. Imported bearings are not only expensive, but also a long supply cycle, which to a certain extent restricts the localization process of electric spindle. In addition, the lagging of shaft cooling technology is also a major problem in the localization of spindles.
Shaft cooling technology can effectively reduce the spindle in high-speed operation of the heat generated to improve the stability and accuracy of the spindle. Domestic enterprises in this area of technology level is relatively low, need to increase R & D investment, breakthrough technology bottlenecks. Despite the many challenges, with the increasing demand for electric spindles in the domestic market, domestic enterprises have also ushered in the development of opportunities.
Some enterprises have gradually made certain achievements in the field of electric spindles by cooperating with universities and research institutions and increasing R&D efforts. Domestic electric spindle penetration rate of less than 30%, but with the continuous progress of technology and market recognition, its localization prospects are still broad.
Source: xianjie.com