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Superplastic forming and diffusion bonding die and preparation method of thin-wall large-dip-angle part

A diffusion connection and superplastic forming technology, which is applied in the field of titanium alloy processing, can solve problems such as the mismatch between the mold surface and the product, difficulty in controlling the precision, and poor sealing effect of the sealing rib, so as to improve the quality of diffusion connection and the quality of diffusion connection , Improve the effect of sealing performance

Active Publication Date: 2022-05-17
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to: in the forming process of thin-walled and large-inclination parts in the prior art, the sealing effect of the sealing rib is poor, and there are molds in the diffusion connection and superplastic molding stages by adding peeling panels between the moulds. The surface does not match the product, the precision is difficult to control, the surface quality of the part is poor, and the technical defects of the formed part need to be polished later. Provide a superplastic forming and diffusion connection mold for thin-walled and large-inclination parts that can effectively improve the sealing performance

Method used

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  • Superplastic forming and diffusion bonding die and preparation method of thin-wall large-dip-angle part
  • Superplastic forming and diffusion bonding die and preparation method of thin-wall large-dip-angle part
  • Superplastic forming and diffusion bonding die and preparation method of thin-wall large-dip-angle part

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Embodiment 1

[0053] Such as Figure 1-7 As shown, this embodiment provides a mold for superplastic forming and diffusion bonding of thin-walled and large-curvature parts, the mold includes an upper mold 1 and a lower mold 2, and the mold between the upper mold 1 and the lower mold 2 The surface is adapted to the shape of the inner and outer surfaces of the part 100; a matching groove 6 is arranged in the ring direction of the sealing surface 9 area of ​​the lower mold 2, and a first sealing rib 7 is arranged in the matching groove 6, and the first sealing rib 7 The ribs 7 are arranged circumferentially in the matching groove 6;

[0054] Also includes an auxiliary sealing plate 5, the auxiliary sealing plate 5 is a hollow structure, the auxiliary sealing plate 5 is arranged to cover the matching groove 6, and the thickness of the auxiliary sealing plate 5 is adapted to the depth h of the matching groove 6 ;

[0055] The auxiliary sealing plate 5 is oppositely provided with a positioning p...

Embodiment 2

[0066] The present invention provides a mold for superplastic forming and diffusion connection of thin-walled and large-curvature parts. The thickness t is 1 / 0.31=3.23; the depth h of the matching groove 6 is 3.53, combined with the formula ③, the maximum value of h is 3, so the value of t is 2.7.

Embodiment 3

[0068] A method for preparing a thin-walled large-curvature part based on the superplastic forming and diffusion-connected mold of embodiment 1, specifically comprising the steps of:

[0069] Step 1: Preforming the sheet material and the auxiliary sealing plate 5, so that the profile of the preformed sheet material diffusion area is consistent with the profile of the part to be prepared, and the sheet material is compatible with the profile of the auxiliary sealing plate 5; the sheet material It includes an upper sheet material 3 and a lower sheet material 4; the upper sheet material 3 is used for bonding with the upper mold 1 of the mold, and the lower sheet material 4 is used for bonding with the lower mold 2 of the mold;

[0070] Step 2: Drill out the positioning holes 121 on the sheet material and the auxiliary sealing plate 5 according to the spraying sample, and place them on the bonding surface between the upper sheet material 3 and the lower sheet material 4 according t...

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Abstract

The invention belongs to the technical field of titanium alloy machining, and particularly relates to a superplastic forming and diffusion bonding die and a thin-wall large-dip-angle part preparation method. According to the die, a matching groove is formed in a sealing molded surface area of a lower die, further, a sealing rib is arranged in the matching groove, under the action of die assembly pressure, a part lower plate close to a sealing molded surface is extruded into a sealing cavity, part of materials in the lower plate are strongly extruded by sharp corners of the sealing cavity, beneficial sealing is formed, and therefore the sealing effect of the lower plate is improved. The sealing performance of the mold is further improved; compared with the prior art, according to the scheme, the sealing ribs can be effectively heightened, and the sealing effect between the mold and a blank is guaranteed. The mold profile of an effective area of a part is not changed, the allowable design height of the sealing rib is increased, and the problem that the sealing performance is poor due to the fact that the sealing rib of a thin-wall part forming mold is low is solved.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to a superplastic forming and diffusion bonding die, in particular to a method for preparing a superplastic forming, diffusion bonding die and thin-walled large-inclination parts. Background technique [0002] Titanium alloy superplastic forming and diffusion bonding is a combination process that simultaneously completes diffusion bonding and superplastic forming during the heating process. Using this process, a multi-layer hollow structure with complex shape and curved surface and reinforced internal ribs can be manufactured, which is different from parts manufactured by traditional manufacturing processes. Compared with this process, it has the advantages of light structure, good integrity and high quality, which greatly improves the design freedom and structural efficiency of components, and has been widely used in aviation and aerospace fields. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/02B23K20/26
CPCB23K20/026B23K20/26
Inventor 任广义王晓康江开林王高明张毅王强卢旭阳张志洪
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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