CNC equipment, typically represented by CNC machine tools and industrial robots, is strategic equipment that affects the lifeline of the country's economy. At present , domestic CNC equipment is constantly approaching the international advanced level in terms of accuracy, speed, multi-axis linkage and composite functions. However, in terms of equipment operation During the process, the failure rate is high, advanced functions cannot be maintained, and reliability problems have become increasingly prominent, which has become a technical "bottleneck" that plagues the development and market share of domestic CNC equipment . In the "High-end CNC Machine Tools and Basic Manufacturing Equipment" project, one of the 16 major projects in the national medium and long-term science and technology development plan,"CNC machine tool reliability technology" is listed as the first key common technology of the project; in the "Made in China 2025" planning outline,"high-end CNC machine tools and robots" are listed as one of the ten major technical fields to be supported, and "improving reliability"is clearly stated as an important development goal in this field. Therefore, carrying out systematic research and development on CNC equipment reliability theory and technology and fault diagnosis, and building a theoretical and technical system for CNC equipment reliability are of great practical significance for improving the reliability of domestic CNC equipment and revitalizing my country's high-end equipment manufacturing industry. It has great significance and far-reaching influence, and at the same time makes an important contribution to the advancement of high-end equipment manufacturing industry in Guangdong Province and the sustainable development of the economy.
1) Preliminary research basis and results
series test system for reliability of key functional components of CNC machine tools: This series of test systems can simulate the stress conditions(including radial force, axial force and torque) of key functional components of CNC machine tools during actual operation, Realize the simulation of conditions close to the actual force in the laboratory environment, at the same time, it can also complete the performance index test of the tested object, the test system can record the working status and fault data of the electric spindle in real time through the data acquisition module, and use special reliability analysis software Conduct reliability analysis on the test results.
Electric spindle reliability test system:
CNC tool holder reliability test system:
Disc/chain tool magazine reliability test system:
2) Research on fault diagnosis technology of intelligent equipment.
For a series of CNC machine tool functional component reliability test systems, health assessment and fault diagnosis technology have been developed, the health and fault diagnosis models of functional components have been studied, and the online health status assessment of functional components has been realized. Adaptively extract fault characteristics of the object under test.
Motorized spindle fault diagnosis and health assessment system:
Combined with the technical requirements for fault diagnosis of automobile wheel hub detection systems, a real-time monitoring test plan was developed to collect equipment operating data, sensor data, equipment alarm data, etc. Currently, the health assessment and fault diagnosis technology of the removable hub detection system under small sample fault data is being studied.
Car wheel hub detection system fault diagnosis system:
3) Scientific research services that can be provided to industries and enterprises
Based on the above research, combined with the industrial characteristics of the Greater Bay Area and Shenzhen City, the following technical services can be provided to enterprises:
(1)Carry out consultation and training on complex electromechanical system reliability engineering and fault diagnosis technology related to high-end CNC equipment and industrial robots. (2)Cooperate with relevant enterprises to carry out application cooperation for national, provincial and municipal scientific research projects. (3)Intelligent manufacturing equipment Development of reliability test system for key functional components. We sincerely hope to contribute to improving the reliability level of enterprise products, and welcome inquiries from enterprise experts.
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