Method for inhibiting buckling of aluminum alloy member with complicated curvature during creep age forming

Abstract

The invention discloses a method for inhibiting buckling of an aluminum alloy member with a complicated curvature during creep age forming. The method comprises the steps of firstly, pasting and fixing a restricting plate around the upper surface of a parent aluminum alloy plate, then wrapping a ventilated felt around the restraining plate and the parent aluminum alloy plate, laying and pasting avacuum bag to form a closed space, and after vacuumizing treatment, putting the treated aluminum alloy plate, the restricting plate and a mold into a hot-pressing tank as a whole for creep age formingto obtain the aluminum alloy member with a complicated curvature. According to the method, in consideration of the fact that in the loading process, the member has insufficient stiffness and is proneto buckling under pressure, buckling is inhibited by configuring the restricting plate at the bearing side of the member, a device for additionally applying blank holder force is omitted, and the method can be applied to the hot pressure tank device commonly used in creep aging forming, which can effectively restrain the generation of buckling and improve the forming quality. In addition, the risk of damage to vacuum film is lowered, the forming precision is improved, and the success probability of the member is increased; and meanwhile, there is no need to reserve a blank holder area beforeplate forming, which is beneficial to near-net forming of the member.

Description

technical field [0001] The invention relates to the technical field of precise forming and manufacturing of complex curvature aluminum alloy components, in particular to a method for suppressing buckling in creep aging forming of complex curvature aluminum alloy components. Background technique [0002] Due to the complexity of the force in the forming process of sheet metal, especially thin-walled components, there will be various deformation forms. Tensile deformation and compression deformation are the main two deformation forms. In the process of large deformation, if the tension or pressure is too large, the plate will appear tensile instability or compression instability, which is specifically manifested as tensile instability leading to rupture, and compression instability as wrinkling. The root cause of wrinkling is excessive compressive stress. Unstability wrinkling, also known as buckling, is the main forming defect of thin-walled components. It is a phenomenon th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for suppressing buckling in the creep aging forming of aluminum alloy components with complex curvature, so as to solve the problem that buckling and wrinkling are prone to occur in the creep aging forming process of thin-walled aluminum alloy components with complex curvature proposed in the background art

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