SPF/DB hollow structure forming method

A hollow structure and intermediate plate technology, which is applied in the field of sheet metal forming to improve structural performance and reliability, eliminate triangular cavity cavities, and improve rigidity and strength.

Pending Publication Date: 2022-06-03
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problem of the triangular cavity in the hollow structure formed by the existing SPF / DB method, the present invention proposes a forming method of the SPF / DB hollow structure

Method used

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  • SPF/DB hollow structure forming method
  • SPF/DB hollow structure forming method
  • SPF/DB hollow structure forming method

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Embodiment Construction

[0029] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplify the principles of the present invention, but not to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments without departing from the spirit of the present invention. Any modifications, substitutions and improvements to parts, assemblies and connections are covered under.

[0030] It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0031] see figure 1 , a flowchart of a method for forming an SPF / DB hollow structur...

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Abstract

The invention discloses an SPF/DB hollow structure forming method. The method comprises the steps that firstly, a skin and a middle plate are machined and formed; 2, a triangular strip with a guide edge is fixed to the skin or the middle plate; 3, the core plate, the middle plate and the skin are stacked together to form a blank, and the periphery is sealed and welded to achieve a sealed state; and 4, the sealed blank is put into a mold and charged into a furnace, and SPF/DB forming is carried out. Compared with the traditional SPF/DB technology, the technical scheme provided by the invention has the advantages that a triangular cavity is eliminated, and the structural performance and reliability are improved; and moreover, the internal and external shapes of the hollow structure can be synchronously and accurately controlled, more functions are realized, the degree of freedom of design is improved, and the rigidity, fatigue and other properties of parts are improved.

Description

technical field [0001] The invention belongs to sheet metal forming technology, and relates to a method for controlling forming defects of superplastic forming / diffusion bonding (SPF / DB) hollow structures, in particular to a method for eliminating triangular cavities. Background technique [0002] Superplastic Forming / Diffusion Bonding (SPF / DB) technology is a low-cost, high-efficiency and nearly no margin component manufacturing technology, which can manufacture integral hollow structural components in one thermal cycle. When the traditional superplastic forming / diffusion joining technology is used to form the hollow structure of the multilayer sheet, a triangular cavity area (referred to as the triangular area) will be formed at the connection between the reinforcing rib and the outer skin. In the final stage of bulging and deforming to form a rib, the core plates on both sides and the outer skin converge at the connection to form a triangular cavity. As the cavity size be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21D26/055B23K20/02B23K20/24
CPCB23P15/00B21D26/055B23K20/023B23K20/24
Inventor 许慧元韩晓宁韩秀全邓瑛刘佳佳
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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