Fourth, the application of CNC machining simulation system in the identification of vocational skills
The numerical control operator is divided into two major contents according to the national vocational skill appraisal standard: theoretical assessment and skill assessment. The skill assessment is divided into five modules: CNC machine tool operation (using manual programming to process actual parts), process preparation, CAD computer drawing, CNC machine tool field troubleshooting analysis and explanation, CAM automatic programming module. The third- and fourth-level operator skill evaluation of CNC machine tools only evaluates the first module, that is, the CNC machine tool operation module of manual programming and machining parts. If the skill operation assessment module is all arranged on the CNC machine tool according to the routine assessment, it usually takes 4-6 hours for the CNC machine tool. We use the CNC machining simulation system software to assist the exam. After the candidates get the parts drawings, they are manually programmed on the CNC machine (or milling) bed of the CNC machining simulation system. After passing the test, the program is sent to the CNC machine through data transmission. Processing, which reduces the time for manual programming, input program, calibration program, and simulation processing on the machine tool. It takes only about 2 hours to occupy the CNC machine tool, which shortens the occupation time by at least 50%, and the identification efficiency is greatly improved. Improve the security at the time of identification. In order to reduce the consumption of tools and materials and further shorten the operation time of CNC machine tools, the operation problem can also be divided into two parts, and the difficult parts can be simulated by manual programming on the CNC machining simulation system, which will be less difficult. The parts with less material are simulated and then processed on the CNC machine.
In short, the application of CNC machining simulation software in teaching and appraisal is still in the beginning and research stage. As long as we actively think about the problems generated in the application and take the initiative to take countermeasures, we will correctly play its role in teaching and appraisal. Can get twice the result with half the effort.
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