Straightening device for high-precision ultra-large-diameter titanium alloy pipe

The utility model discloses a straightening device for a high-precision ultra-large-diameter titanium alloy pipe, the outer diameter of the ultra-large-diameter titanium alloy pipe is phi 100-phi 700 mm, the wall thickness delta is larger than 5 mm, the straightening device comprises a bottom plate, a left supporting die, a right supporting die, a left supporting groove, a right supporting groove and a right supporting groove, a semicircular right supporting groove, a fixing frame, a hydraulic air cylinder and an upper supporting mold are formed in the upper side of the left supporting mold from top to bottom, and a semicircular upper supporting groove is formed in the lower end of the left supporting mold from bottom to top. The upper supporting die is used for being matched with the left supporting die and the right supporting die to clamp the pipe and is driven by the hydraulic air cylinder to press the pipe downwards to straighten the pipe. By means of the straightening device, the ultra-large-diameter th