CNC machine tools are mainly used in the processing of parts, and every minute will affect the processing quality. In the operation of CNC machine tool, the machine tool structure, processing process and method will affect the machining accuracy. Therefore, it is necessary to effectively control the influencing factors, and the following Kunshan Duyang CNC will share the method of improving the accuracy of CNC machine tools. First, the factors affecting the processing accuracy 1. Position and tool error The position error is the error between the size and the design size. For example, in the machining of spiral bevel gear CNC machine tools, if the transmission parts and rotating shaft parts have size and relative position accuracy errors, it will not only affect the accuracy of the parts, but also cause deformation problems of production parts, and even lead to the whole batch of parts scrapped, resulting in huge economic losses. Tool error is the error caused by the tool itself and friction of the machine tool. The tool is the key tool of CNC machine tool, the error value will be caused by the setting of the tool parameters and the accuracy of the tool itself. For example, in the outer circle turning work, it will be affected by the radius of the tool tip and the operation behavior, which may produce a small error, but under the continuous effect, the error will gradually expand, and eventually affect the standard of machining parts. At the same time, in the tool processing process, the tool main deflection Angle, workpiece height difference and other error problems are also very common, so if you want to control the machining accuracy of the machine tool, you must implement the parameter facilities, tool deviation control, position optimization, timely adjustment and maintenance of processing equipment. 2. Servo system and deformation error Servo system is the key to CNC machine tool control, and the running quality of servo system directly affects the running condition of machine tool. For example, the servo system can provide power for the lathe drive and operation, but in this process, if the ball screw transmission error occurs, it will inevitably cause an error in the accuracy of the parts. Deformation error is also an important part of CNC machine tool precision control. In the production operation of CNC machine tools, there will be a certain clamping force, gravity and friction, which will cause elastic deformation or displacement of machining tools for a long time, and deformation errors will also occur. Second, the method of improving the machining accuracy of CNC machine tools 1. Strengthen error control and management Although there is no way to completely avoid CNC machine tool processing error, but can take effective control and compensation error, the processing error is limited to a reasonable range, you can improve the accuracy of parts processing. For example, the error problem caused by the tool installation position and tool wear can be enhanced by strengthening the control of the accuracy of the tool installation position, enhancing the stability of the tool and the fixture, ensuring the rigidity of the relative position of the tool and the workpiece, and effectively reducing the cutting error and friction loss. In addition, the servo system is closely related to the machining accuracy and production quality of the parts, so the servo system deviation correction work is implemented to optimize the internal environment of the system and the performance of the parts. Aiming at the error of linear and circular machining accuracy in lathe turning, the coordination of feed shaft position and open loop gain can be improved, the machining accuracy of workpiece contour can be guaranteed, and the machining accuracy of parts can be effectively improved. 2. Improve the overall performance of CNC machine tools Continuous improvement of CNC machine tool performance and processing technology, the construction of intelligent, automated precision monitoring system, real-time monitoring of parts processing quality, in order to ensure the stable development of CNC machine tools. At the same time, the enterprise should also implement technology research and development work, do a good job of error factors and data investigation, optimize the structural design and function of the machine tool, and improve the overall accuracy level of the CNC machine tool. In addition, under the support of information technology, establish a remote control system based on big data technology and infrared temperature measurement technology to monitor the machining process of CNC machine tools in real time. Once problems such as excessive heat and abnormal mechanical operation are found, signal data can be transmitted to supervisors or corresponding control systems in time, providing a reliable basis for processing accuracy management. 3. Optimize the machine operating environment First of all, carry out regular maintenance work. Regular cleaning, lubrication and tool overhaul work to reduce friction errors during processing. At the same time, in order to avoid the air environment caused by fuselage oxidation, maintenance personnel need to regularly check the air humidity and ventilation conditions, ensure that the CNC machine tool is in a dry, heat dissipation and no direct sunlight processing environment, improve the overall operation quality of the CNC machine tool, effectively control the corrosion and deformation of the machine tool equipment, and improve the accuracy of parts processing. Secondly, improve the professional quality of CNC machine tool operators. In the CNC machine tool processing, the operator's professional skills, professional literacy and other factors have a direct impact on the parts processing accuracy, production quality, once there are operational errors, work attitude neglect and other problems, will seriously affect the production quality and efficiency.