Method and device for controlling laser peening correcting shape precision of aero-engine bracket on line

Abstract

The invention discloses a method for controlling laser peening correcting shape precision of an aero-engine bracket on line. The method comprises the following steps of (1) detecting the outline of a welding bracket, and measuring deformation amount and residual stress near a welding region and nodes through a three-dimensional shape measuring system; (2) inputting measured data into a large data platform, wherein welding nodes with different structures are divided in comparison with an existing designed structural scheme, and deformation types of the welding nodes are respectively analyzed; (3) according to different divided types, calculating shape precision errors of bracket tube units of deformation node regions, determining needed correcting amount, planning sequence for correcting the deformed regions and determining the optimal correcting scheme; (4) correcting the deformation nodes of the aero-engine bracket according to the optimal correcting scheme, carrying out shape detecting on the corrected modes through a three-dimensional shape measuring instrument, and inputting data into the large data platform; and (5) evaluating the correcting effect through the large data platform, determining whether secondary correcting is needed or not, repeating steps (1) to (3) if needed, and approaching step by step until the designed needed shape precision is reached.

Description

technical field [0001] The invention relates to the field of aviation component manufacturing, in particular to a method and a device for on-line control of shape accuracy by laser shot peening of an aircraft engine bracket. Background technique [0002] The aircraft engine support is a space frame structure obtained by welding hollow steel pipes. During the welding process, the base metal of the support nodes is locally heated unevenly, resulting in welding residual stress, which causes a large residual deformation of the space frame structure and poor shape accuracy. As a result, the mounting bolts of the engine bracket deviate from the installation position, which affects the subsequent assembly. The current method used in practical engineering applications is to increase the size and then cut off the excess deformation by machining. This method is time-consuming and labor-intensive, and the processing consistency is poor. [0003] The existing shape correction method is...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the welding deformation of the aero-engine bracket nodes and the problems existing in the existing shape correction methods, the present invention proposes a method and device for on-line control of the shape accuracy of the aero-engine bracket by laser shot peening.

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