The machining accuracy error caused by the geometric error of CNC machining service. In the processing of CNC machine tools, due to external forces, heat generated during processing and other external factors, the geometric accuracy of the machine tool is affected, and the geometric deformation of the parts processed on the machine tool will cause geometric errors. According to research, there are two main reasons for geometric errors of CNC machine tools: internal factors and external factors. The internal factors that cause the geometric errors of the machine tool refer to the geometric errors caused by the factors of the machine tool itself, such as the level of the machine table, the level and straightness of the machine tool guide rails, and the geometric accuracy of the machine tools and fixtures. External factors mainly refer to geometric errors caused by external environment and thermal deformation during processing. For example, geometric errors caused by thermal expansion and deformation of tools or parts during the cutting process can affect the machining accuracy of machine tools and parts.
From the long-term data analysis and actual operation of parts processing, it can be seen that the machining accuracy error caused by the positioning of CNC machining service machine tools. The positioning of the machine tool has a great influence on the machining accuracy of the CNC machine tool. From the structural point of view, the machining error of CNC machine tools is mainly caused by the positioning accuracy, and the machine tool feed system is the main link that affects the positioning accuracy. The feed system of CNC machine tools is usually composed of a mechanical transmission system and an electrical control system. In structural design, the positioning accuracy is related to the mechanical transmission system. In closed-loop systems, CNC machine tools can usually prevent positional deviations of major components (such as ball screws and other components) in the feed system through positioning detection devices. However, for the open-loop system, due to many influencing factors and complex conditions, it is impossible to perform positioning monitoring, so the machining accuracy of CNC machine tools is greatly affected.