Machining method of multi-featured thin-walled plate parts based on blank initial residual stress release

Abstract

This application relates to the technical field of mechanical processing, and discloses a machining method for multi-featured wall panel parts based on the release of the initial residual stress of the blank. First, due to the influence of the initial residual stress of the blank, there is a certain degree of warpage in the blank before processing, so , using a blank self-deformation offset strategy, which is used to offset the deformation caused by the release of the blank residual stress during the machining process of the part; then, the processing tool and chip parameters during the frame surface machining are fixed to avoid the large cutting force and stress during the cutting process. The phenomenon of uneven release; finally, for the processing of the frame surface, the trimming step is canceled, and the grid-like stress relief groove is added by using the mesh cutting method, which helps to release the stress of the part evenly and suppress the deformation of the part. The application can effectively control the processing deformation of the multi-featured thin-walled plate parts due to the release of the initial residual stress of the blank, solve the problems of serious deformation of the parts during processing, and difficult control of processing accuracy, and ensure the machining quality of the parts.

Description

technical field [0001] The present application relates to the technical field of mechanical processing, in particular to a machining method for multi-featured thin-walled plate parts based on the release of the initial residual stress of blanks. Background technique [0002] In recent years, with the continuous development of the manufacturing industry, the technological requirements for CNC machine tools have also been continuously improved. As the main load-bearing parts and main assembly skeleton in the aircraft structure, the wall plate parts are constantly developing in the direction of integral parts, large-scale, complex and high-precision. The proportion of such parts in the aircraft structural parts The ratio is also increasing day by day, and it plays a pivotal role in the overall structure of the aircraft. Large-scale wall plate parts have the characteristics of large outline size, many cavities, and thin wall thickness. Aiming at the deformation problem of large...

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Problems solved by technology

[0004] In order to solve the above-mentioned problem of part deformation caused by the release of blank residual stress during the processing of large removal rate, this application provides a machining method for multi-featured thin-walled plate parts based on the release of blank initial residual stress

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