Reverse design method based on large torsion angle rotor blade die forging production

The invention provides a reverse design method based on large torsion angle rotor blade die forging production. The method comprises the following steps based on content requirements: (1) designing and manufacturing an initial die; (2) performing trial production of a blade by the initial die, and measuring the actual distortion degree of the cooled moulding surface of the body of the blade; (3) repairing the die and repeating steps (2) and (3) till qualified blade forgings are test out; (4) measuring and scanning the die which tests out the qualified blade; and (5) optimizing the initial die by the data measured in step (4), thereby obtaining a reasonable die model. According to the method provided by the invention, a reversed research method suitable for the large torsion angle rotor blade is designed by utilizing the reverse thinking, thereby solving the distortion problem of the moulding surface of the body of the blade, greatly shortening the research period and saving research cost at the same time.