A method for controlling the deformation of thin-walled parts with complex curved surfaces during laser shot peening

Abstract

The invention discloses a method for controlling the deformation of thin-walled parts with complex curved surfaces in the process of laser shot peening strengthening, which includes the following processes: S1, establishing a library file, which contains the deformation forms of the sheet under different conditions; S2, determining the sheet The corresponding relationship between the depth of surface plastic deformation and the deformation mode and deformation amount of the sheet metal, and store the results in the library file; S3, based on elastic-plastic mechanics, combined with the analysis and processing of finite element simulation and laser peening experiment results, to establish different deformation forms Deformation characteristic parameters, determine the positive and negative deformation conversion threshold parameters; S4, based on the characteristic equation or surface coordinates of the thin-walled part surface, combine the laser peening parameters and the thickness of different regions to calculate the deformation characteristic parameters, and determine the selected laser peening strengthening Whether the parameter will be deformed. The invention has the advantages of intuitive scheme and easy judgment, can effectively control the deformation of complex curved thin-walled parts during laser shot peening strengthening, and meets the high requirements of complex curved thin-walled structural parts.

Description

technical field [0001] The invention belongs to the technical field of laser processing and manufacturing, and in particular relates to a method for controlling deformation of thin-walled parts with complex curved surfaces during laser shot peening strengthening. Background technique [0002] As a new surface modification technology, laser shot peening has the advantages of high loading pressure, deep influence of plastic deformation, controllable impact area and loading pressure parameters, and easy automation. Plastic deformation occurs, that is, micro pits are formed on the surface to realize local volume transfer on the surface of the part, causing the part to deform, especially in the process of laser shot peening of complex curved thin-walled parts, the complex surface curvature makes thin-walled parts very easy Bending and torsional deformations occur, and reasonable evaluation and prediction of the deformation of complex curved surface thin-walled parts during laser ...

AI Technical Summary

Problems solved by technology

[0002] As a new surface modification technology, laser shot peening has the advantages of high loading pressure, deep influence of plastic deformation, controllable impact area and loading pressure parameters, and easy automation. Plastic deformation occurs, that is, micro pits are formed on the surface to realize local volume transfer on the surface of the part, causing the part to deform, especially in the process of laser shot peening of complex curved thin-walled parts, the complex surface curvature makes thin-walled parts very easy Bending and torsional deformations occur, and a reasonable evaluation and prediction of the deformation of complex curved surface thin-walled parts during laser shot peening can help improve the effect of laser shot peening; the current evaluation method is cumbersome to judge and it is not convenient situation control

Images