Titanium alloy thin-wall seamless lining straight cylinder section superplastic forming wall thickness uniformity control method

The invention discloses a titanium alloy thin-wall seamless lining straight cylinder section superplastic forming wall thickness uniformity control method, and belongs to the technical field of plastic processing. According to the method, a small-caliber lining spinning part with the variable wall thickness is adopted for conducting superplastic bulging, firstly, a thinning area is machined on a straight cylinder section of the lining spinning part, an original equal-thickness straight cylinder section is machined into a variable-wall-thickness pipe with the same annular direction and axial gradient distribution, and then superplastic bulging is conducted. According to the method of the invention, through the special wall thickness gradient design, the wall thickness distribution of the straight cylinder section of the bulged titanium alloy lining can be adjusted, a large-diameter lining blank with the thickness of the straight cylinder section being evenly distributed is obtained, the requirement for subsequ