Two-way pressurized liquid-filled forming method for large thin-walled and complex-featured plates

Abstract

The invention relates to a bidirectional pressing liquid-charging forming method for a large-size thin-wall complex characteristic panel. The method comprises the following steps: coating lubricating oil on a single side of a thin-wall panel, thereby performing lubricating treatment; bulging the panel after being lubricated in advance in a pre-forming mould, thereby forming the rough shape of parts; reversely shaping the pre-formed panel in a shaping mould, thereby forming small circular bead features; cutting off addendum surfaces of the parts, thereby finally forming the parts. According to the bidirectional pressing liquid-charging forming method for the large-size thin-wall complex characteristic panel provided by the invention, the plasticity of the panel is fully utilized, the wall thickness reduction rate of the parts is effectively controlled and the panel parts with any complex shallow characteristics can be formed. Compared with the explosive forming of the traditional similar parts manufacturing method, the bidirectional pressing liquid-charging forming method has the advantages of high efficiency, low cost, convenience and safety in operation, high precision of formed parts, no manual repairing, and the like.

Description

technical field [0001] The invention belongs to the technical field of metal pressure processing, in particular to a liquid-filled forming method for a large thin-wall plate with complex shallow features. Background technique [0002] With the development of aviation technology, the new generation of aircraft has higher and higher requirements for aerodynamic performance and appearance, and aircraft sheet metal parts are developing in the direction of high strength, high precision, high surface quality and complex surface features. High-strength aluminum alloy materials are widely used in aircraft structural parts due to their light weight, high strength, strong corrosion resistance, and good fatigue performance. However, aluminum alloys have poor plasticity, low elongation, small thickness anisotropy index, and low hardening index. , for sheet metal parts with complex and large deformations, defects such as wrinkling and cracking are prone to occur during the forming proces...

AI Technical Summary

Problems solved by technology

However, to form large plate parts with small fillet features, higher forming pressure is required, and the tonnage requirement of the equipment is correspondingly increased, so the tonnage of the equipment becomes the main factor restricting the forming of such parts

Images