Achieving high rigidity and rotational speed stability of CNC lathes is crucial for precision machining. Here are some methods and techniques that can help achieve performance optimization in both areas:

1. Machine tool structure design: CNC lathe design with a strong and stable machine tool structure is the key to achieving high rigidity. Optimized structural design is adopted, including the reasonable layout of the machine bed, support beams, spindle box and other components, to improve the rigidity of the entire machine.

2. High-quality materials: CNC lathes use high-quality, high-strength metal materials to manufacture key components, such as the machine tool body, guide rails, ball screws, etc., to increase the overall rigidity of the machine tool.

3. Guide rail and screw screw design: CNC lathes choose high-precision, low-friction guide rail and screw screw systems to ensure the smooth operation of moving parts. Preloading device and dust-proof measures are adopted to extend the service life of the guide rail and screw.

4. Spindle system: CNC lathes adopt high-speed, high-precision spindles, and use professional bearings and cooling systems to improve the stability and load-bearing capacity of the spindles. In addition, dynamic balancing technology is used to reduce the vibration of the spindle.

5. Tool holder and tool system: The CNC lathe is designed with a solid tool holder structure to ensure the stability of the tool. Choose appropriate tool materials and structures to improve cutting stability.

6. Rigid connection: CNC lathes use rigid connection methods at the connections of key components, such as riveting, welding, etc., to reduce the occurrence of looseness and vibration.

7. CNC system optimization: CNC lathes optimize the algorithms and control strategies of the CNC system to ensure that the system can achieve efficient and precise control for different processing conditions and workpiece requirements. Adopt high-performance CNC system to improve control accuracy.

8. Vibration control technology: CNC lathes apply vibration control technology, such as active vibration suppression systems or vibration reduction devices using special materials, to reduce the vibration of the machine tool and improve stability.

9. Cooling system: CNC lathes use an effective cooling system to keep the temperature of key components stable and prevent dimensional changes and thermal deformation caused by temperature changes.

10. Regular maintenance: Regularly maintain the CNC lathe, including lubrication, tightening bolts, cleaning, etc., to ensure long-term stable operation of the machine tool.

By comprehensively adopting the above measures, the rigidity and speed stability of CNC lathes can be effectively improved to meet the needs of high-precision and high-efficiency precision machining.