Discussion on maintenance training for numerical control problem determination

In order to achieve the training objectives and requirements, we have developed a detailed training plan and continuously improve the revised training plan during the implementation process. The main courses arranged in teaching are: descriptive geometry and mechanical drawing, engineering mechanics, mechanical design basis, interchangeability and measurement technology, engineering materials and thermal processing, mechanical manufacturing engineering, analog electronic technology, digital electronic technology, electrical technology. , hydraulic and pneumatic control technology, microcomputer principle and interface technology, machine tool electronic control and PLC, CNC machine tools, CNC machine tool fault detection and maintenance, mechanical CAD / CAM, etc., the minimum time required for theoretical courses is 3157 hours, the minimum credit is 198 points. Through theoretical and experimental teaching, the purpose of teaching is achieved. The main practical teaching links are course design, skill training, graduation design (thesis), etc., totaling 65 weeks in 5 years, and implementing the action plan for college students' innovation and training, carrying out various design and practical activities, and passing through sufficient practice links. To achieve the purpose of linking theory with practice. In order to highlight professional features and emphasize hands-on ability, we have carefully arranged the content of skills training.

In the teaching, we will focus on reform and innovation, and establish a scientific and feasible curriculum system. The curriculum system consists of four modules: general education, professional foundation, professional curriculum and practice. The professional foundation has added electric courses and optimized the content of the machine courses so that students can lay a good foundation for electromechanical communication. The professional courses highlight the core courses of CNC machine tools, sensor technology, AC speed control systems, CNC machine tool fault diagnosis and maintenance. The practice link focuses on creating a practical teaching system, performing numerical control processing, fault diagnosis and maintenance of mainstream CNC systems, and assembling skills training for CNC lathes, enabling students to obtain intermediate and advanced professional qualification certificates for CNC machine tool operations and CNC machine tools. .

Using advanced teaching methods, the innovative teaching mode emphasizes the penetration between theoretical knowledge and training in teaching. Combining professional theory teaching with skill training, according to the "basic theory ??? simulation training ??? special training?? The idea of ​​“integrated training ??? vocational qualification assessment” adopts the teaching methods such as case teaching method, project-based teaching method and task-driven teaching method to form a teaching mode that integrates theoretical teaching, practical teaching and technical service.

To build an integrated and faculty team, the faculty consists of professionals in the fields of mechanics, electronics, and information from universities and research institutes. By participating in CNC maintenance training, independent research and development of CNC maintenance test bench, assembly of CNC lathes, construction of experimental training room, and provision of services for enterprises, we have created a team of theoretical and practical integrated teachers.

At present, 70% of the teachers with professional qualifications in the profession.

For the core curriculum, the development of the applicable textbooks of this major adheres to the principle of “advanced theory, practical content, operational, and close integration of theoretical practice”, and organizes the power to compile nine courses of CNC machine tool structure and principle, CNC machine tool fault diagnosis and maintenance training. Teaching materials and handouts, among which "CNC machine tool structure and maintenance" became the national 11th five-year national planning textbook for general higher education.

With the support of many parties, this specialty has also built a multi-functional experimental training base to shape students' practical ability through mechanical and electrical testing, numerical control processing, numerical control system fault diagnosis, CNC machine tool assembly and debugging, and provide the society with urgently needed compound talents. .

Highlighting the training of the skills training practice link In the compulsory practice course, in addition to the 22- to 25-week course design and graduation design, there are 4 weeks of traditional work skill training and 10 weeks of CNC machining skill training. 14 weeks of CNC maintenance skills training, truly outstanding professional features, emphasizing hands-on ability.

The 4-week traditional job skills training strengthens the business foundation of the mechanical profession.

10 weeks of CNC machining skill training, through the simulation operation and programming training on the computer, the actual programming operation training of metal materials in the machining center and CNC lathe, can enable students to reach the middle and senior level of CNC machine tool programming and operation. Through the theoretical and operational assessment, the corresponding level of operation certificate can be obtained, so that students have strong CNC machine tool programming and operation capabilities to meet the needs of social employment.

14 weeks of CNC maintenance skills training, and strive to achieve outstanding professional features. We adopted the module teaching method and divided the training content into 5 modules: 2 weeks of tool post disassembly and machine tool precision inspection training; 2 weeks of FANUC CNC system test bench comprehensive training; 3 weeks Huazhong CNC system test bench comprehensive training; 3 weeks of Siemens CNC system test bench comprehensive training; 3 weeks of actual assembly of CNC machine tool training, and finally arranged 1 week of comprehensive training.

The tool holder disassembly and assembly and the precision inspection of the machine tool enable the students to understand the mechanical structure and control principle by disassembling and disassembling the tool holder, and familiar with the precision detection method of the machine tool. The comprehensive training of CNC test benches equipped with three kinds of numerical control systems with high market share enables students to master the composition, control principle and connection method of CNC machine tools, and carry out simulated troubleshooting to enable students to have certain fault diagnosis and repair capabilities. . In the actual assembly of CNC machine tools for 3 weeks, the students assemble the machine tools in groups, completing the whole process from the design of CNC machine tools, the installation and commissioning of mechanical components, the installation of electrical cabinets, the connection of CNC systems, and the commissioning of the whole machine. Students have a systematic understanding of the design, installation and commissioning of CNC machine tools.

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