Why Do CNC Parts Produce Positional Errors During Machining?

The primary reason for the azimuth error in the machining of CNC parts is the machining error caused by the gap and elastic deformation of the transmission during the machining of the CNC parts of the machine tool, as well as the azimuth error caused by the friction force that the tool head needs to overcome during the machining process. In the open-loop system, the azimuth accuracy is greatly affected, while in the closed-loop servo system, the azimuth accuracy mainly depends on the displacement detection.

Machining accuracy errors caused by geometric errors in CNC parts machining. In the processing of CNC machine tools, due to the influence of external factors such as external force and heat generated during processing, the geometric accuracy of the machine tool is affected, and the geometric deformation of the parts processed by CNC parts on the machine tool will lead to geometric errors. According to the research, there are mainly two reasons for the machining errors of CNC parts: internal factors and external factors. The internal factors that cause geometric errors in CNC parts processing refer to the geometric errors caused by the processing elements of CNC parts, such as the levelness of CNC parts processing table, the levelness and straightness of CNC parts processing guide rails, and the level of CNC parts processing tools and fixtures. Geometric accuracy, etc.

From the long-term data analysis and actual operation of cnc parts processing, it can be seen that the machining accuracy error caused by the positioning of the cnc parts processing machine tool. From a structural point of view, the machining error of CNC parts processing is mainly caused by the positioning accuracy, and the CNC parts processing feed system is the primary link that affects the positioning accuracy. The feed system of CNC parts processing machine tools is usually composed of mechanical transmission system and electrical control system.