Large complex curvature component accurate forming method

Abstract

The invention belongs to the technical field of metal sheet manufacturing, and relates to a large complex curvature component accurate forming method. The large complex curvature component accurate forming method comprises the following steps of 1) performing roll bending treatment on the original plate of the large complex curvature component to be machined on the basis of the following variablecurvature of a mold profile; and 2) carrying out creep aging forming on the original plate after the original plate is subjected to the roll bending treatment so as to obtain the high-precision forming large complex curvature component. By virtue of the large complex curvature component accurate forming method, the creep aging forming operation is simple, and a phenomenon of breakage of a vacuum bag in the forming process can be avoided; and meanwhile, the potential safety hazard of hurting people caused by rebounding of the component can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of sheet metal manufacturing, and relates to a precise forming method for large complex curvature components, in particular to a variable curvature roll bending-creep aging forming manufacturing method for complex curvature components used in aerospace. Background technique [0002] Creep aging forming is a new type of sheet metal forming method developed to realize the precise forming and high-performance collaborative manufacturing of large-scale overall high-strength aluminum alloy components for aerospace. It has the advantages of high forming accuracy, low cost, high repetition rate, and residual Low stress and other advantages. At present, this technology is mainly applied to the forming and manufacturing of small curvature components, such as the upper and lower skins of aircraft wings. However, for the creep aging forming of complex and large curvature components, it is faced with the problem that t...

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Problems solved by technology

However, for the creep aging forming of complex and large curvature components, it is faced with the problem that the chord height between the component and the mold surface is too large, which makes the actual vacuum bag sealing operation difficult, such as figure 1

Due to the design requirements, large components with complex curvatures for aerospace often have a certain strength and rigidity. Continuous vacuum loading is required to make the component bend close to the mold surface. During this process, the vacuum bag will be sucked into the cavity formed by the component and the mold. It is easy to break due to uneven force or be crushed by the component at the end, resulting in the failure of component forming; and after the vacuum bag is broken, the component rebounds, which is easy to hurt people and cause safety accidents

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