A multi-point active loading aircraft panel prestressed shot peening tooling and shot peening method

Abstract

The invention provides a multi-point active loaded aircraft panel prestressing shot blasting tooling and method. The multi-point active loaded aircraft panel prestressing shot blasting tooling is composed of a rigid frame, a longitudinal beam and a plurality of puncher pins. A linear guide rail is designed on the frame, the longitudinal beam is mounted on the linear guide rail, and the puncher pins and a compression mechanism are mounted on the longitudinal beam, wherein the height of each puncher pin can be subjected to digital control adjustment by a computer, and the compression mechanism is used for fixing a wall panel. Each puncher pin is equipped with an integrated digital-controlled driving decelerating motor, the motor rotates to drive a guide screw, the height adjustment of each puncher pin body in the axial direction is achieved, and each puncher pin body can be locked at any position. Compared with a traditional prestressing shot blasting fixture, the digital-controlled puncher pins can form a pre-bending type face to achieve pre-bending of a wall panel piece with any curvature. The multiple puncher pins make the wall panel to bear prestress more evenly, and the phenomenon of partial distortion caused by single point applying force can be avoided effectively. In the forming process of a blasted shot, the heights of the utilized puncher pins can be adjusted in real time according to the deformation situation of the wall panel, and thus the accuracy of forming of the blasted shot is improved. After the blasted shot is formed, the tooling can serve as a test profiling to test the forming error of a curved wall panel.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to a multi-point active loading prestressed shot-peening tool for aircraft wall panels and a shot-peening method. Background technique [0002] In the field of aircraft manufacturing, as the most important part of the aircraft - the overall panel, it is an important part of the aerodynamic shape of the aircraft, and it is also the main load-bearing component of the wings and fuselage. But its large size and complex curvature challenge the forming technology. At present, at home and abroad, shot peening has become the best method for modern aircraft, especially the integral wall panel forming of the wing of large passenger aircraft because of its unique advantages. However, shot peening has a certain forming limit, that is to say, the curvature of its forming has a limit value, and free shot peening is easy to cause spherical deformation of the sheet. T...

AI Technical Summary

Problems solved by technology

However, the fixtures commonly used in the prior art mainly have the following two deficiencies: one, the force applying mechanism of the fixture does not meet the versatility, and a set of force applying mechanism is often limited to a kind of wallboard part; Less, it is easy to cause local distortion, uneven distribution of prestress, and poor prebending effect

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