1. Before operating the welding piece shot blasting machine, ensure that all safety precautions are in place, including wearing appropriate personal protective equipment such as gloves, goggles, and a helmet.

2. Carefully read and understand the manufacturer's instructions for operating the shot blasting machine. Familiarize yourself with the controls and safety features of the machine.

3. Inspect the welding piece to be shot blasted for any flammable or explosive materials. Remove or adequately protect such materials before starting the machine.

4. Ensure that the welding piece is securely fixed on the machine's rotating table or conveyor system. Make sure there are no loose or hanging parts that may interfere with the operation of the machine.

5. Adjust the machine's settings, such as shot size, velocity, and duration, according to the requirements of the welding piece. Follow the manufacturer's guidelines for the recommended settings.

6. Before starting the machine, ensure that the shot blasting chamber is clear of any obstructions or debris. Check that the abrasive media is adequately filled and properly distributed in the chamber.

7. Start the shot blasting process by activating the machine's controls. Monitor the operation closely to ensure that the welding piece is evenly and thoroughly shot blasted.

8. If any abnormalities or malfunctions occur during the operation, immediately stop the machine and address the issue. Do not attempt to repair or troubleshoot the machine while it is running.

9. After shot blasting, carefully remove the welding piece from the machine, taking care to avoid contact with any remaining abrasive media. Inspect the piece for desired finish quality and ensure it meets the required specifications.

10. Properly clean and maintain the shot blasting machine after each use. Regularly inspect and replace any worn or damaged components to ensure safe and efficient operation.

11. Finally, always follow proper waste disposal procedures for the spent abrasive media and any waste generated during the shot blasting process.