Method for preparing three-layer hollow component through superplastic forming/diffusion connection

A hollow member, diffusion joining technology, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve the problem of material waste process, and achieve the effect of reducing surface grooves, improving material utilization rate, and reducing milling process.

Active Publication Date: 2018-07-27
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Application Information

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Problems solved by technology

Compared with single-layer, two-layer and four-layer structures, the application of three-layer structure is less. The main reason is that the three-layer structure is easy to produce surface grooves. In the pri

Method used

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  • Method for preparing three-layer hollow component through superplastic forming/diffusion connection
  • Method for preparing three-layer hollow component through superplastic forming/diffusion connection
  • Method for preparing three-layer hollow component through superplastic forming/diffusion connection

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] The invention provides a method for preparing a three-layer hollow member by superplastic forming / diffusion connection. In the process of preparing a three-layer hollow member by superplastic forming / diffusion connection, forming is carried out in combination with a hard sheathing process design method and a variable temperature process control method . Specifically, such as figure 1 shown, including:

[0031] 1) Select the core board and panel, and degrease and clean the surface to ensure a smooth surface.

[0032] 2) ...

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Abstract

The invention provides a method for preparing a three-layer hollow component through superplastic forming/diffusion connection. In the process that the three-layer hollow component is prepared throughthe superplastic forming/diffusion connection technology, forming is conducted by combining a hard sheath technological design method and a temperature change process control method. Aiming at the three-layer hollow component, combining of the hard sheath technological design method and the temperature change process control method is put forward, and forming of surface grooves in the forming process of the three-layer hollow component is reduced. According to main improvement points, a hard sheath forming method is adopted, a hard sheath keeps in contact with a face plate all the time in theforming process, under the high-temperature condition, enough surface friction force is provided, the deformation speed of the face plate is coordinated, and thus tensile stress to the face plate inthe inner reinforcing rib forming process is not enough to enable the face plate to deform. Additionally, in the forming process, through temperature change control, control over the forming speed isachieved, forming of the surface grooves of a formed part can be effectively reduced, the design range of the three-layer hollow component is extended, the milling work procedure is reduced, and the material utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of hollow member manufacture, in particular to a method for preparing a superplastic forming / diffusion connection three-layer hollow member. Background technique [0002] Superplastic Forming and Diffusion Bonding (SPF / DB) technology is a nearly no-stock forming technology that combines superplastic forming and diffusion bonding. Design and manufacturing had a major impact. The overall structural parts of the aircraft manufactured by SPF / DB technology can not only meet the design requirements, such as light weight and high rigidity; but also meet the technical requirements, simplify the manufacturing process of parts and components, shorten the manufacturing cycle, Reduce the amount of manual labor and reduce costs. SPF / DB hollow structural parts have shown great advantages in reducing the mass of aircraft and reducing production costs, and are widely used in aircraft, aero-engines, missiles, spacecraft an...

Claims

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Application Information

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IPC IPC(8): B23K9/16B23K9/235
CPCB23K9/16B23K9/235
Inventor 付明杰许慧元王飞
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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