It is very important to determine the cutting amount of CNC lathe, which directly affects the processing efficiency, workpiece quality and tool life. The following are some commonly used methods and guidance for determining the cutting volume of CNC lathes:

1. Experience method: Usually, CNC lathe operators will determine the cutting amount based on their experience. This requires extensive processing experience and understanding of different materials and tools. However, the reliability and accuracy of this method may be limited.

2.Manufacturer Recommendations: CNC lathe manufacturers usually provide cutting amount recommendations for their CNC lathes and cutting tools. These recommendations may be adjusted based on material type, tool specifications, machining parameters, etc. Following the manufacturer's recommendations ensures safe and optimal processing results.

3. Cutting force model: CNC lathes can use the cutting force model to estimate and optimize the cutting amount. These models are based on the cutting properties of the material, cutting conditions, tool geometry and other factors, and reasonable cutting quantities can be obtained through simulation or calculation.

4. Trial cutting experiment: Trial cutting experiment on CNC lathe is one of the common methods to determine the cutting amount. By gradually adjusting the cutting amount during actual processing and observing the processing effect and tool wear, the optimal cutting amount can be determined.

5. Cutting stability chart: CNC lathe cutting stability chart is a commonly used method to determine the optimal cutting amount. Through experiments or simulations, the cutting stability curves under different cutting dosages are obtained, and the stable area within the cutting dosage range is selected as a reference.

6. Tool life and processing quality: The selection of CNC lathe cutting amount should take into account the balance between tool life and processing quality. If the cutting amount is too large, it may cause premature tool wear or the processing quality is reduced; conversely, if the cutting amount is too small, it will affect the processing efficiency.

7. Online monitoring and optimization: Using the online monitoring function of CNC lathes, parameters such as cutting force and tool wear can be monitored in real time, so that the cutting amount can be optimized and adjusted according to the actual situation.

Taking the above methods and factors into consideration, the appropriate cutting amount can be selected to achieve the best processing effect and tool utilization.