Positioning tool for eccentric boss of gas turbine casing

The invention discloses a positioning tool for an eccentric boss of a gas turbine casing, and belongs to the technical field of gas turbine product mechanical manufacture. The positioning tool comprises a base, a positioning plate, a connection assembly, a first telescopic rod and a second telescopic rod. The base comprises a centering rod. One end of the first telescopic rod is hinged to the centering rod. The first telescopic rod is perpendicular to the centering rod. The other end of the first telescopic rod is connected with the connection assembly. One end of the second telescopic rod isconnected with the connection assembly, and the other end of the second telescopic rod is perpendicularly connected with the positioning plate. The second telescopic rod is perpendicular to the firsttelescopic rod and the centering rod. The surface, connected with the second telescopic rod, of the positioning plate comprises a positioning line. The positioning line is parallel to the axis of thecentering rod. According to