Bidirectional pressing liquid-charging forming method for large-size thin-wall complex characteristic panel

A two-way pressurized and liquid-filled forming technology, which is applied in the field of metal pressure processing, can solve problems such as high pressure and high forming pressure, and achieve the effects of high efficiency, high precision and simple process

Active Publication Date: 2014-06-11
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to form large plate parts with small fillet features, higher forming pressure is required, and the demand for equipment tonnage is also increased accordingly, so the tonnage of equipment has become the main factor restricting the forming of such parts

Method used

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  • Bidirectional pressing liquid-charging forming method for large-size thin-wall complex characteristic panel
  • Bidirectional pressing liquid-charging forming method for large-size thin-wall complex characteristic panel
  • Bidirectional pressing liquid-charging forming method for large-size thin-wall complex characteristic panel

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Embodiment Construction

[0023] like figure 1 -- Image 6 As shown, the two-way pressurized and liquid-filled forming method for large thin-walled and complex-featured sheet materials provided by the present invention includes the following steps in order

[0024] 1) Select an aluminum alloy 2024 plate 5 with a wall thickness of 0.5mm as the blank, apply lubricating oil to one side of the blank 5 to reduce friction, and leave the other side untreated.

[0025] 2) Put the lubricated sheet into the die 5 of the preforming die, wherein the side coated with lubricating oil faces the preforming punch 4 , and the side not coated with oil faces the preforming die 5 .

[0026] 3) After the sheet is placed, the preforming punch 4 goes down, relying on the limit pad 6 on the preforming die to ensure a gap of about 1.1 times the thickness of the sheet between the preforming punch 4 and the preforming die 7 . Apply a pressure of 8Mpa to the liquid chamber of the preforming die through the liquid inlet on the p...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/021
Inventor 郎利辉孔德帅孙志莹阮尚文谷珊珊
Owner BEIHANG UNIV
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