Summary:

CNC machine tools are prone to vibration, noise and other problems due to improper operation during the processing process, which seriously affects the machining accuracy of the workpiece. In order to reduce the vibration and noise of the hydraulic system and avoid the expansion of noise, this paper puts forward some suggestions for improvement. Mainly includes: 1. **Improvement of the structure of the hydraulic system**: Use low-noise hydraulic components, control the number of hydraulic pumps, and set vibration eliminators and filters. 2. **Improvement of the installation method of hydraulic device**: Install a suitable hydraulic pump and optimize the installation of pipelines. 3. **Choose the right oil**: Choose an oil of moderate viscosity to avoid oil pollution. 4. **Avoid hydraulic impact**: Reduce the hydraulic impact caused by the sudden closing of the valve port, and control the hydraulic impact of moving parts when braking and decelerating. These suggestions are summarized by Shanghai Yangyu Hydraulics based on experience and are for reference only. I hope it can help in the prevention and improvement of vibration and noise of the hydraulic system of CNC machine tools.