Welding mould that high reliability was easily maintained

The utility model relates to a welding mould that high reliability was easily maintained, including welding the child subassembly, weld the both ends of child subassembly and fix respectively on positioner, welding the child subassembly and including two first lamella bodies and two second lamella bodies, the two first lamellas body and the two second lamellas body are with positioner's the setting of pivot central symmetry and the first lamella body and the alternate setting in the circumference of pivot of the second lamella body, be equipped with on the first lamella body along the weldingseam collet of first lamella body length direction extension, the both sides of welding seam collet are equipped with welding seam positioning electromagnet, the both ends of the first lamella body and the second lamella body be equipped with respectively the first lamella of the adjustment body with the second lamella body relative position realization weld the adjusting device of child subassembly overall dimension chan