(I) Description of welding method:
1. Place the spot-welded workpiece on the fixture and clamp it;
2. Perform pneumatic tail lifting to press the workpiece to be welded;
3. Start welding, the welding gun reaches the welding position, and with manual assistance, the circumferential seam welding can be performed.
4. After welding, the welding gun retreats, the pneumatic clamp is released at the same time, and the workpiece is manually unloaded. A working cycle is completed.