Repair welding anti-deformation device for thin-wall titanium alloy casting

The utility model discloses a thin-wall titanium alloy casting repair welding anti-deformation device, and relates to the technical field of welding and casting, two mounting pipes are fixedly connected through two U-shaped connecting rods to form a rectangular frame structure, and screw rods which are coaxially arranged with the mounting pipes and are in clearance fit with the mounting pipes are arranged in the mounting pipes; wherein the diameter of the screw in one mounting pipe is larger than that of the screw in the other mounting pipe, the inner end face of the large-diameter screw is provided with an insertion groove used for containing the small-diameter screw, the outer end face of the mounting pipe is provided with a driving piece used for driving the screw to move in the axial direction of the mounting pipe, and the outer end of the screw is provided with a steel cushion block. The thin-wall annular titanium alloy casting tensioning device can be adaptively adjusted according to the diameter of an