Composite manufacturing device for high-rib thin-wall aluminum alloy wallboard part and using method

Abstract

The invention provides a high-rib thin-wall aluminum alloy wallboard part composite manufacturing device and a using method, and belongs to the technical field of aviation aircraft aluminum alloy sheet metal machining. According to the invention, the advantages of skin stretch forming and wallboard shot peening forming are combined together, and a brand-new high-rib aluminum alloy wallboard part composite forming technological process and a brand-new composite forming tool are designed; qualified parts are machined through three different forming modes and technological processes of numerical control milling, skin stretching forming and shot blasting forming. The method can be used for manufacturing large-curvature high-rib wallboard parts, ribs of the formed parts are not broken or twisted, surface defects such as coarse grains, orange peel and hammer marks are not generated on the surfaces, and the fatigue resistance and corrosion resistance of the parts are enhanced. In addition, thin-wall plates are adopted as raw materials to machine parts, thick plates are prevented from being used, the machining milling amount is reduced, and the raw material cost and the machining cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy sheet metal processing of aviation aircraft, and relates to a composite manufacturing device for high-rib thin-walled aluminum alloy wall plate parts and a method for using the same. Background technique [0002] The front fuel tank of the newly developed model adopts the design scheme of high rib aluminum alloy integral wall plate, the thickness of the skin is 1.5mm, the distribution height is 15mm, and the wall thickness is 1.5mm. Different from the traditional third-generation fuel tank wall panels with smaller curvature, the overall curvature of this type of wall panel is large, and the curvature reaches more than R600mm. If the traditional machining process scheme is adopted, it is necessary to purchase an aluminum plate with a thickness of about 1 meter, and an application is required. Special machining and milling fixtures, process equipment design and manufacturing cycle are long, t...

AI Technical Summary

Problems solved by technology

Different from the smaller curvature of the traditional three-generation oil tank wall, this type of wall has a large overall curvature, with a curvature of more than R600mm. If the traditional machining process is adopted, an aluminum plate with a thickness of about 1 meter needs to be purchased, and an application is required. Special machining fixtures for milling and cutting, process equipment design and manufacturing cycle is long, the cost is huge, and the deformation of parts after machining is uncontrollable

If the method of machining according to the unfolded state of the digital model is used first, and then the sheet metal is formed, it is necessary to force the material to flow by repeatedly "receiving", "unwinding" and "combining rewinding and unwinding" during forming, which is prone to tendons Strip instability, rib fracturing; web instability, web fracturing; parts cannot be precisely manufactured, and a large number of hammering results in poor surface quality of parts

In addition, this part is related to the airtightness and fatigue life of the aircraft fuel tank. A large number of manual trimming and grinding will easily affect the performance and cause hidden dangers to aircraft flight safety. Therefore, this type of wall panel is relatively difficult to process.

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