Deformation-controllable aero-engine blade laser shock peening method and device

Abstract

The invention discloses a deformation-controllable aero-engine blade laser shock peening method and a deformation-controllable aero-engine blade laser shock peening device. According to the technical scheme, surface peening treatment is performed on an aero-engine blade by adopting a double-sided synchronous laser shock peening method; before strengthening, position information of each point on a laser shock strengthening process path is collected through an X-ray distance measuring instrument to serve as initial data, in the laser shock strengthening process, the X-ray distance measuring instrument and a pulse laser work synchronously, and the position information of shock points is collected in real time; the computer control system regulates and controls technological parameters of the pulse laser by comparing real-time data with initial data, and real-time shape correction in the laser shock peening process is achieved so as to achieve the effect of controlling blade deformation. The method has the advantages of high efficiency, high yield and the like, and can be applied to multiple fields of aircraft turbines, blisk, steam turbines, water turbines and the like in aviation and civil use.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a deformation-controllable laser shock strengthening method and device for an aeroengine blade. Background technique [0002] Laser shock strengthening technology is a new type of surface strengthening technology, which mainly uses high peak density (GW / cm2 level) and short pulse (ns level) pulsed laser to irradiate the metal surface, and the absorbing layer (aluminum foil, black Paint or other materials) form a high temperature (>1000°C), high pressure (>1GPa) plasma shock wave by absorbing laser beam energy, due to the obstruction of the constrained layer (1-2mm thick, deionized water, special glass or other materials) The shock wave propagates to the inside of the material, and it interacts violently and non-equilibrium with the metal surface, causing cold plastic deformation on the metal surface, changing the microstructure of the surface material and inducing a resi...

AI Technical Summary

Problems solved by technology

However, due to the stress balance effect of the blade in the process of laser shock strengthening, the overall blade will produce macroscopic deformation, especially in the edge area of ​​the blade, its thickness is relatively thin, generally about 1-2mm, and it is extremely easy to bend and deform during laser shock strengthening. When its deformation exceeds the error line, it will seriously affect the efficiency of blade compressed air, resulting in reduced engine performance and reduced service life

Images