A viscous medium external pressure forming device for large curvature thin-walled components

Abstract

The invention relates to the field of thin-wall component manufacturing for aerospace equipment, in particular to an external pressure forming device for a viscous medium of a large-curvature thin-wall component. The external pressure forming device comprises a viscous medium injection loading die, a forming die, a core shaft, a viscous medium injection cylinder, a loading die sealing ring, a cylinder blank, a viscous medium loading power source hydraulic cylinder and a viscous medium injection loading die end part sealing loading power source hydraulic cylinder. According to the device, viscous medium injection pressure is provided through a power control system, and viscous medium loading pressure is controlled; viscous media are applied to a forming blank through injection channels andgenerate forming force on the forming blank, different numbers of injection channels in different shapes can be arranged according to the shape and the wall thickness of the forming part, external pressure forming pressure loading of the viscous media can be effectively controlled, the stress state of the blank of a control panel is achieved, the blank reasonably deforms and flows, and the formability of plates is improved. The device is simple in structure, easy to operate, good in control stability and capable of effectively carrying out external pressure forming on the viscous media.

Description

technical field [0001] The invention relates to the field of forming and manufacturing of thin-walled parts of aerospace equipment, in particular to a viscous medium external pressure forming device for large-curvature thin-walled parts. Background technique [0002] Thin-walled members with large curvature are a typical shell structure, which are often used in thermal protection systems in the fields of aviation, aerospace and industrial thermal engineering. At present, the method often used to process such parts is to perform simple soft mold compression molding on the deformation zone. Flowing downward to the deformation zone, if the supplementary material is greater than the increase in the surface area, under the action of the circumferential compressive stress, defects such as instability and wrinkles will occur, which seriously reduces the surface quality of the formed part; when there are constraints at both ends of the blank , because the two ends of the blank are ...

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Problems solved by technology

However, there is a lack of corresponding forming devices

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