Extension hinge welding frock

Extension hinge welding frock is including the base plate of rectangle, characterized by the middle part of base plate open to have and place the wherein constant head tank of a panel, constant head tank one side be provided with the backup pad of placing another panel, the height that highly is less than the base plate up end of backup pad, the one side that is close to the backup pad on the constant head tank are provided with the recessed hinge of placing the hinge and using, in order to make the better location of panel, the constant head tank in be provided with the pinhole, placed the locating pin in the pinhole, at the base plate up end, be close to the backup pad side and be provided with the pillar, the utility model has the beneficial effect of simple structure, welding process places panel and hinge in corresponding position respectively, just can weld for the axis of the hollow tube that welds out is unanimous, its convenient to use moreover, and welding quality is stable, and welding quality is good, has improved the quality of product.