The speed of CNC vertical lathe refers to the speed of spindle rotation. Its impact on processing is multi-faceted, including cutting speed, tool life, surface quality, etc. The following are the main effects of CNC vertical lathe speed on processing:

1. Cutting speed: The rotational speed directly affects the cutting speed, that is, the rate at which the tool cuts on the workpiece. Cutting speed is an important factor that determines processing efficiency and cutting heat. Proper cutting speed helps maintain the cooling state of the tool and improves processing efficiency.

2. Tool life: Rotation speed has a significant impact on tool life. Choosing the appropriate rotation speed can slow down tool wear and extend tool life. Too high a rotational speed may cause premature wear of the tool, while too low a rotational speed may cause the tool to cut smoothly, which will also affect the service life.

3. Surface quality: The rotation speed has a direct impact on the quality of the machined surface. Appropriate rotational speed can produce a smooth and fine machined surface, while improper rotational speed may lead to increased surface roughness.

4. Processing accuracy: The rotation speed has a certain impact on the processing accuracy of CNC vertical lathes. When cutting at high speeds, the dynamic response and rigidity of the machine tool may need to be considered to ensure that machining accuracy is not affected.

5. Cutting force and power: The rotation speed directly affects the cutting force and power. When choosing speeds, you need to balance the cutting force requirements to ensure that the machine tool and tool can operate properly.

6. Material adaptability: Different workpiece materials may require different rotation speeds to achieve the best processing results. For different types of materials, the rotation speed needs to be adjusted according to their hardness, toughness and other characteristics.

In CNC vertical lathe processing, it is usually necessary to select the appropriate rotation speed based on the specific workpiece material, tool type and processing requirements. This often requires experimentation and practice to find the best processing parameters to ensure efficient, precise and stable processing.