In the rough machining process of CNC vertical lathe, it is very important to select the appropriate cutting amount, which directly affects the processing efficiency and cutting quality. The following are some general principles and methods for selecting cutting dosage:

1. Based on the workpiece material and hardness: Workpieces of different materials and hardness require different cutting amounts. Generally speaking, harder materials require smaller cuts, while softer materials can use larger cuts. According to the hardness index of the workpiece material, select the appropriate cutting dosage range.
2. Reference experience value: Usually, the client and processing personnel have accumulated a certain amount of experience for specific materials and part types, and can provide reasonable cutting amount references. These experience values are usually compiled and summarized based on actual situations and can be used as an initial reference.
3. Cutting force and power limitations: An important factor in cutting quantity selection is the cutting force and power limitations. Choosing the appropriate cutting amount should ensure that the cutting force and power are within the allowable range of the equipment to ensure the safety of the operation and the normal operation of the equipment.
4. Trial cutting test: Before starting formal processing, a trial cutting test can be conducted to determine the cutting amount. According to the shape of the workpiece, tool type and material characteristics, a set of test cuts are first performed. By observing indicators such as cutting quality, tool wear and driving power, the suitability of the cutting amount is evaluated, and necessary adjustments and optimizations are made.
5. Balance cutting efficiency and cutting quality: When selecting cutting dosage, it is necessary to balance processing efficiency and processing quality. Larger cutting volume can improve processing efficiency, but may affect tool life and machined surface quality. Therefore, the appropriate cutting amount should be selected based on comprehensive considerations based on specific needs and requirements.

It should be noted that the cutting amount is not fixed and may need to be adjusted according to the processing conditions during the actual processing. Processing personnel should closely observe the cutting process and make timely adjustments to the cutting amount according to the situation to achieve the best processing effect. In addition, when adjusting the cutting amount, it is necessary to ensure that the adjustment range is moderate to avoid excessive increases or decreases that may have adverse effects on the processing process.