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A four-layer structure step-by-step superplastic forming-diffusion bonding method

A technology of superplastic forming and diffusion bonding, applied in the field of precision sheet metal processing, can solve problems such as difficult control of the process, reduction of material performance, complex process, etc., and achieve the effects of simplifying the process, shortening the cycle, and improving the pass rate

Active Publication Date: 2020-12-25
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes the core board and the panel to be in a high temperature environment for several hours or even longer, which will reduce the material performance
In addition, the conventional process cycle is long, the process is complicated, and it is difficult to control the process

Method used

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  • A four-layer structure step-by-step superplastic forming-diffusion bonding method
  • A four-layer structure step-by-step superplastic forming-diffusion bonding method
  • A four-layer structure step-by-step superplastic forming-diffusion bonding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a four-layer structural part, such as Figure 1-2 As shown, the four-layer structural parts are the upper panel 1, the upper core panel 2, the lower core panel 3 and the lower panel 4 from top to bottom, and there are multiple vertical ribs between the upper core panel 2 and the lower core panel 3.

Embodiment 2

[0038] This embodiment provides a four-layer structure superplastic forming-diffusion bonding mold, such as image 3 As shown, the four-layer structure superplastic forming-diffusion bonding mold includes a first upper mold 7, a first lower mold 8 matched with the first upper mold 7, and a mold type between the first upper mold 7 and the first lower mold 8 cavity; the first upper mold 7 and the first lower mold 8 are provided with ventilation grooves, and the ventilation grooves are used to ventilate into the mold cavity.

Embodiment 3

[0040] This embodiment provides a core plate superplastic forming mold, such as Figure 4 As shown, the core plate superplastic forming mold includes an air cavity, a second upper mold 9 and a second lower mold 10 matched with the second upper mold 9, the second upper mold 9 is provided with a plurality of upper mold vertical ribs 5, and the second upper mold 9 is provided with a plurality of upper mold vertical ribs 5. The second lower mold 10 is provided with a plurality of lower mold vertical ribs 6; the second upper mold 9 and the second lower mold 10 are provided with ventilation grooves, and the ventilation grooves are used to ventilate the air cavity. In order to facilitate demoulding, the vertical ribs 5 of the upper mold and the vertical ribs 6 of the lower mold are both set with a draft angle of 2-3° on one side. If the draft angle is too small, it is difficult to demould, and if the draft angle is too large, the subsequent forming process will be difficult. will con...

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Abstract

The invention relates to a four-layer structure step-by-step superplastic forming-diffusion connection method and belongs to the technical field of precision sheet metal processing. The problems thatthe existing process has long period, the process flow is complex, the qualification rate is low and a panel is grooved are solved. The four-layer structure step-by-step superplastic forming-diffusionconnection method comprises the following steps: S1, performing superplastic forming on an upper panel and a lower panel in a four-layer structure superplastic forming-diffusion connection mold; S2,performing diffusion connection on an upper core plate and a lower core plate in the four-layer structure superplastic forming-diffusion connection mold, to obtain a core plate assembly; S3, putting the core plate assembly with diffusion connection completed in the step S2 in a core plate superplastic forming mold to perform superplastic forming; S4, assembling the upper panel and the lower panelobtained in the step S1 as well as the superplastic formed core plate assembly obtained in the step S3, welding and performing edge sealing to obtain a four-layer structure assembly; and S5, mountingthe four-layer structure assembly into the four-layer structure superplastic forming-diffusion connection mold and performing diffusion connection on the panels and the core plates. The four-layer structure step-by-step superplastic forming-diffusion connection method can be applied to four-layer structure superplastic forming-diffusion connection.

Description

technical field [0001] The invention relates to the technical field of precision sheet metal processing, in particular to a step-by-step superplastic forming-diffusion connection method of a four-layer structure. Background technique [0002] The superplastic forming-diffusion joining process of parts is an advanced lightweight forming method, which can be used to manufacture hollow belt sandwich structures. The parts produced by it have been widely used in aerospace, weaponry and other fields. The four-layer structure mainly includes I-shaped rib type, cross rib type, etc., and is mainly manufactured by superplastic forming-diffusion connection technology. The diffusion connection of the core board, the superplastic forming of the face plate, the superplastic forming of the core board, and the diffusion connection of the core board and the face plate are all completed under one thermal cycle when the four-layer structure is conventionally manufactured. This causes the core...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D47/00B21D39/02B21D37/10
CPCB21D37/10B21D39/026B21D39/028B21D47/00
Inventor 李保永刘伟秦中环姚为刘奇薛杰
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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