The workpiece clamping of CNC vertical lathe is a key process step, which directly affects the processing accuracy and efficiency. The following are the general steps for clamping workpieces on CNC vertical lathe:

1. Select the appropriate fixture: CNC vertical lathe selects the appropriate fixture according to the shape, size and processing requirements of the workpiece. The fixture can be a dedicated custom fixture or a general fixture.

2. Clean the workpiece and fixture: Before clamping the CNC vertical lathe, ensure that the surface of the workpiece and fixture is clean, free of oil and impurities to ensure uniform and stable clamping force.

3. Adjust the fixture position: CNC vertical lathe places the fixture on the lathe table and adjusts the position of the fixture according to the size and shape of the workpiece so that the fixture can firmly fix the workpiece.

4. Clamp the workpiece: Place the workpiece in the fixture and clamp the workpiece using the clamping device. Ensure that the clamping force of the fixture is uniform to avoid movement or deformation of the workpiece during processing.

5. Check the clamping: Before starting the processing, the CNC vertical lathe carefully checks the clamping of the workpiece to ensure that the workpiece is not loose or offset.

6. Correct the workpiece position: Use the lathe's coordinate system setting function to correct the position and posture of the workpiece to ensure that the tool can accurately position and cut the workpiece during processing.

7. Fix the fixture: After confirming that the workpiece position is correct, the CNC vertical lathe uses bolts or clamping devices to fix the fixture to ensure that the fixture does not move or shake during processing.

8. Processing: After the workpiece is clamped and the fixture is fixed, the CNC vertical lathe is started for processing. According to the processing program and tool path, the workpiece is accurately processed.

9. Monitor the processing process: During the processing of the CNC vertical lathe, regularly check the processing quality and dimensional accuracy of the workpiece, adjust the processing parameters and tools in time, and ensure that the processing effect meets the requirements.

10. Complete the processing: After the CNC vertical lathe is completed, turn off the lathe and remove the workpiece. Check the processing surface quality and dimensional accuracy, and perform trimming and correction if necessary.

These steps can help ensure the accuracy and stability of the CNC vertical lathe clamping workpiece, thereby achieving high-quality machining results.