The speed of CNC vertical lathe has the following influences on processing:

1. Cutting speed: The speed of CNC vertical lathe determines the cutting speed, that is, the speed at which the cutting tool contacts the workpiece. Higher rotational speed can achieve higher cutting speed and help to improve processing efficiency. However, too high a cutting speed may cause premature tool wear or overheating, so it is necessary to select an appropriate speed according to the material and tool characteristics.
2. Surface quality: The choice of rotational speed directly affects the quality of the processed surface. Higher rotational speeds generally produce smoother, finer surfaces, reducing cutting forces and tool vibration, resulting in improved surface finish and precision.
3. Tool life: The speed also has a direct impact on the life of the tool. Excessively high speed may cause increased tool wear and reduce tool life; while too low speed may cause problems such as tool jamming and excessive cutting force, which will also reduce tool life. Therefore, selecting an appropriate rotational speed is crucial to prolonging tool life.
4. Machining accuracy: The difference in speed will also affect the machining accuracy. In general, a higher rotational speed improves machining accuracy because it reduces cutting forces, vibration, and machining errors. However, for some specific processing requirements, it is necessary to select the appropriate speed according to the matching degree of cutting materials, tools and processing requirements.

In practical applications, the selection of the speed of the CNC vertical lathe needs to consider the above factors comprehensively, and select the appropriate speed range according to the specific processing requirements, material characteristics and tools. In addition, it is necessary to continuously carry out trial cutting tests and accumulate practical experience to determine the best rotational speed parameters.