Metal plate forming process of aircraft stepped thin-walled part

Abstract

The invention discloses a metal plate forming process of an aircraft stepped thin-walled part. The process includes the steps of determining the size of a blank, conducting blanking, obtaining a basin-shaped initial type piece through dual deep drawing forming, and obtaining the final part through rubber bag hydraulic secondary forming after cutting. The traditional forming mode achieved by hitting a mold by hand is replaced with the mode of conducting hydraulic forming after deep drawing, the machining efficiency can be effectively improved, and the part machining quality can be improved. By means of the dual deep drawing forming mode, the stress mode during deep drawing is improved, and the situations of thinning and stress concentration of the part are avoided. By means of the rubber bag hydraulic forming, negative-angle bent edges are obtained, and the defects of the deep drawing process are overcome. The production efficiency of the part can be effectively improved, higher economic benefits can be obtained, and the product quality can be ensured.

Description

technical field [0001] The invention relates to a forming process for thin-walled sheet metal parts such as stainless steel, aluminum alloy, and structural steel, and in particular to a sheet metal forming process for aircraft ladder-shaped thin-walled parts. Background technique [0002] At present, some parts of civil aircraft projects, such as the wear plate of the boarding door service frame, are thin-walled parts that have been bent many times, and the processing is relatively difficult. The traditional manufacturing of such parts often adopts the processing methods of manual forming and drop forming. However, due to the large number of turning and transition areas of such parts, wrinkles and micro-cracks are prone to occur at the flanges, and some parts have both internal and external flanges. The production process of traditional processing technology is extremely difficult, requiring skilled workers to work for a long time, the qualified rate of parts is still less t...

AI Technical Summary

Problems solved by technology

The traditional manufacturing of such parts often adopts the processing methods of manual forming and drop forming. However, due to the large number of turning and transition areas of such parts, wrinkles and micro-cracks are prone to occur at the flanges, and some parts have both internal and external flanges. The production process of traditional processing technology is extremely difficult, and skilled workers are required to work for a long time. The qualified rate of parts is still less than 40%, and the surface quality of parts and the degree of forming film are difficult to guarantee.

However, the above-mentioned invention is mainly aimed at profiles, and the wall thickness of the stepped thin-walled parts is not more than 1.5mm, which is prone to wrinkling, orange peel, micro-cracks, etc. The forming process is very different, and the processing difficulties are also different.

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