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

Abstract

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.

Description

technical field [0001] The invention relates to die forging of blades, and in particular provides a reverse design method based on die forging production of large torsion angle rotor blades. Background technique [0002] Forgings of large torsion angle rotor blades often have the problem of blade surface deformation during the die forging cooling process, even if thermal correction is used, it cannot be rescued, which seriously affects the pass rate of forgings and hinders mass production of blades. Moreover, there is no accurate theoretical data support for the degree of deformation of the airfoil profile, so that it is impossible to accurately pre-design a certain degree of reverse deformation during the design process of the blade forging die. For this reason, the development of large torsion angle rotor blades often adopts "mold design (preset a certain degree of reverse deformation first) → mold manufacturing → field test → mold optimization → mold remanufacturing → on-...

AI Technical Summary

Problems solved by technology

[0002] Forgings of large torsion angle rotor blades often have the problem of blade surface deformation during the die forging cooling process, even if thermal correction is used, it cannot be rescued, which seriously affects the pass rate of forgings and hinders the mass production of blades

Moreover, the degree of deformation of the airfoil profile is not supported by accurate theoretical data at present, so that it is impossible to accurately pre-design a certain degree of reverse deformation during the design process of the blade forging die.

For this reason, the development of large torsion angle rotor blades often adopts "mold design (preset a certain degree of reverse deformation first) → mold manufacturing → field test → mold optimization → mold remanufacturing → on-site verification again", that is, "design first, then "Trial production" method, and the number of mold optimization iterations is often carried out many times, and the mold redesign and manufacturing cycle is very long, which seriously affects the development progress of the blade

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