Machining tool and mounting method of transmission shaft assembly

The invention relates to the technical field of aeronautical manufacturing process equipment, in particular to a machining tool of a transmission shaft assembly and an installation method.The machining tool comprises a fan-shaped rocker arm, a taper bolt, a positioning pressing plate, a lining and a rhombic pin assembly. Calculating middle and lower limits; step S2; performing bluing; step S3; performing cold press fitting; step S4; performing combination; step S5; hydrogen removal treatment; step S6; the fan-shaped rocker arm is assembled with the transmission shaft; step S7; assembling an arc-shaped gasket; step S8; locking is conducted; step S9; a fit clearance; the original machining process and installation smoothness are broken through, after the rhombic pin I, the rhombic pin II and the transmission shaft are blued, the installation positions of the rhombic pin I and the rhombic pin II are fixed through the positioning pressing plate, and cold press fitting is carried out; and the diamond pin I, the di