When using CNC vertical lathe for wheel hub processing, the following items need to be paid attention to when starting up and debugging and processing workpieces:
Start up and debug:

1. Safety inspection: Before turning on the machine, conduct a comprehensive equipment safety inspection to ensure that all safety protection devices work normally and prevent accidents.
2. Power connection: Make sure that the power connection of the CNC vertical lathe and its supporting equipment is correct and the voltage is stable to avoid electrical failures.
3. Cooling system: Make sure that the coolant in the cooling system is sufficient and the cooling system is operating normally to maintain a stable temperature of the equipment during processing.
4. Lubrication system: Check whether the lubricating oil or grease of the lubricating system is sufficient to ensure that the sliding parts of the equipment can be lubricated normally.
5. Numerical control system: Make sure that the power supply of the numerical control system is normal and the operation interface functions normally. If there is a new machining program, ensure the process of loading and verifying the program.
6. Tool installation: Check whether the tool is installed correctly, and ensure that the tool is installed firmly and its position is accurate.
7. Workbench calibration: Calibrate the initial position of the workbench to ensure that the starting point of processing is accurate.

Precautions for processing workpieces:

1. Workpiece clamping: The hub workpiece needs to be firmly clamped to ensure that the workpiece will not move or deform during processing. The design and adjustment of the fixture must be reasonable to ensure processing quality.
2. Processing program: Make sure to load the correct processing program, which includes tool path, cutting parameters, processing sequence and other information.
3. Cutting parameters: Set appropriate cutting speed, feed speed, cutting depth and other cutting parameters. The setting of these parameters will affect the processing quality and tool life.
4. Tool selection: According to the material and processing requirements of the hub, select the appropriate tool type and specification to obtain the best processing effect.
5. Processing monitoring: During the processing process, pay close attention to the operating status of the CNC vertical lathe, especially the cutting conditions, tool wear, etc. Adjust cutting parameters and tools in a timely manner to ensure processing quality.
6. Quality inspection: After the processing is completed, the wheel hub will be inspected for quality, including size, roundness, surface quality, etc. Ensure that the processing results meet the design requirements.
7. Safe operation: When operating the CNC vertical lathe, it is necessary to follow the equipment operation manual and safety regulations to avoid operational errors or potential safety hazards.
8. Environmental cleaning: After the processing is completed, clean up the CNC vertical lathe and the working environment, remove debris, lubricating oil and other debris, and keep it clean.

These considerations will help ensure safe operation of the CNC vertical lathe and high-quality results in wheel hub machining. In actual operation, appropriate adjustments need to be made according to specific equipment models and processing requirements.