Brake discs and wheel hubs are important components of automotive braking systems, and they require precise machining to ensure vehicle safety and performance. To machine brake discs and wheel hubs, CNC lathes are often used. The following is the general process of cutting CNC lathes for brake disc and wheel hub processing:

1. Material preparation:
First, the raw materials for the brake disc and wheel hub need to be prepared, which are usually disc-shaped materials of iron alloy or aluminum alloy. These materials need to be cut to size to fit on the lathe.

2. Clamp the workpiece:
Brake discs or wheel hubs are typically clamped on the table of a CNC lathe. Clamping equipment ensures that the workpiece maintains a stable position and rotation during machining.

3. Programming:
The next step is to write a CNC program that defines parameters such as the cutting tool's path of motion, depth of cut, speed and feed rate. The settings of these parameters will affect the quality and efficiency of processing.

4. Tool selection:
Select the appropriate tool based on the material and geometry of the workpiece. Brake discs and wheel hubs often require high-speed tungsten carbide tools or carbide tools to achieve efficient cutting.

5. Cutting operations:
CNC lathes automatically perform cutting operations based on pre-written programs. This includes roughing and finishing to ensure the workpiece reaches the required dimensions and surface quality.

6. Measurement and inspection:
After processing is completed, the brake disc and wheel hub usually need to be measured and inspected to ensure that their dimensions and surface quality meet requirements. This can be done using measuring instruments and quality inspection equipment.

7. Surface treatment:
Depending on the requirements, brake discs and hubs may require surface treatments such as heat treatment, grinding or painting.

8. Cleaning and packaging:
Finally, the finished brake discs and wheels are cleaned and packaged in preparation for shipment to the customer or assembly into the vehicle.

CNC lathes play an important role in brake disc and wheel hub machining because they can precisely control cutting operations, providing high quality and consistent machining results. Additionally, CNC lathes are able to accommodate workpieces of different sizes and shapes, making them an effective tool for the production of these parts.