Prestressing shot-blasting formation technique for double-curved wallboard

Abstract

A pre-stressing and grit-blasting technique for shaping a double-curvature plate wall used as the thick jacket of large airplane features that a pre-stressing fixture unit is used to pre-bend a plate longitudinally and transversely and fix it for applying a pre-stress to it while the grits are blasted onto said plate for obtaining a needed shape.

Description

technical field [0001] The present invention relates to manufacturing technology, more specifically relates to the shot blasting forming technology of complex wing panel of large aircraft. Background technique [0002] The aerodynamic performance of an aircraft mainly depends on the wing airfoil. The complex hyperboloid shape is the mainstream of modern large aircraft design, which can increase the cruising speed of the aircraft, and has significant advantages such as low fuel consumption and excellent aerodynamic performance. However, complex airfoils also increase the difficulty of forming wing panels. For such wing panels whose thickness and curvature change in span and chord respectively, the preferred forming method is shot peening. Shot peening is a forming method that uses a high-speed metal shot flow to hit the surface of a metal plate, causing plastic deformation of the surface material on the sprayed surface, introducing residual stress, and gradually making the wo...

AI Technical Summary

Problems solved by technology

However, free shot peening has limited forming ability for large wing panels with double curvature and variable thickness, and it is difficult to form them finally.

[0003] In order to overcome the shortcomings of the existing free shot peening for the shot peening of

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