CNC vertical lathes are often ideal for machining shaft parts because of their high precision, efficiency and versatility. The following is the general process for CNC vertical lathe processing of large shaft parts:

1. Design and preparation work: Before starting processing of CNC vertical lathe, it is necessary to design the parts and prepare the necessary materials and tools. This includes accurate CAD drawings and CAM programs, as well as the required raw materials (usually metal materials such as steel, aluminum, etc.) and tooling.

2. Clamping workpieces: Large shaft parts of CNC vertical lathes are usually clamped on the lathe by special clamps. The fixture must be designed to maintain workpiece stability and allow cutting tools to easily access the entire workpiece surface.

3. Tool selection and setting: Select the appropriate tool according to the design requirements and processing technology of the part. For large shaft parts, commonly used tools include turning tools, boring tools, drill bits, etc. Once the tools are selected for CNC vertical lathe, they need to be installed and set up correctly to ensure accuracy and stability during the machining process.

4. Processing technology settings: Set processing parameters on the CNC vertical lathe, including cutting speed, feed speed, cutting depth, etc. The selection of these parameters depends on factors such as workpiece material, tool type and machining accuracy requirements.

5. Processing operation: Start the CNC system, and the CNC vertical lathe starts the processing process. The CNC vertical lathe CNC system will control the movement of the tool according to the pre-programmed processing path and parameters, and gradually remove excess material from the workpiece until the size and surface accuracy required by the design are achieved.

6. Finishing and surface treatment: Once the CNC vertical lathe completes the initial processing, some finishing operations may be required, such as grinding, turning, etc., to further improve the dimensional accuracy and surface quality of the parts. In addition, as needed, CNC vertical lathes can also undergo surface treatment, such as coating, spraying, etc., to enhance the wear resistance and corrosion resistance of parts.

7. Quality inspection: Finally, the CNC vertical lathe performs quality inspection to ensure that the processed parts meet the design requirements. This may include using measuring instruments to check parameters such as dimensional accuracy, surface roughness and shape deviations.

Through the above steps, CNC vertical lathes can efficiently process large shaft parts, ensure their dimensional accuracy and surface quality, and meet the needs of various engineering and manufacturing applications.