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Complex molded surface pneumatic loading superplastic forming diffusion bonding method

A technology of superplastic forming and diffusion bonding, which is applied in the field of sheet metal thermal processing, and can solve problems such as reducing the frequency of mold rework and insufficient welding rate of diffusion bonding

Pending Publication Date: 2021-12-21
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to overcome the defects of the above-mentioned prior art, the present invention provides a complex surface pneumatic loading superplastic forming diffusion connection method, the present invention can effectively solve the problem of insufficient welding rate of titanium alloy complex surface pneumatic loading superplastic forming diffusion connection, And it can prolong the service life of the superplastic forming diffusion bonding die and reduce the repair frequency of the die

Method used

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  • Complex molded surface pneumatic loading superplastic forming diffusion bonding method
  • Complex molded surface pneumatic loading superplastic forming diffusion bonding method
  • Complex molded surface pneumatic loading superplastic forming diffusion bonding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] see Figure 1-Figure 3 , a complex surface pneumatically loaded superplastic forming diffusion connection method, comprising the following steps:

[0052] a. First use the concave and convex die of the titanium alloy thermoforming mold to preform the upper panel, lower panel and auxiliary plate of the part, so that the preformed sheet material diffusion area profile is consistent with the part profile;

[0053] b. Drill two positioning holes according to the surface of the preformed part, and draw the outline line of the diffusion and handover area according to the solder resist spraying sample based on the positioning hole;

[0054] c. Carve criss-cross ventilation grooves on the auxiliary plate according to the contour line of the diffusion junction area, so that the position of each ventilation groove passes through the diffusion connection area;

[0055] d. The gas path is carved by a five-axis laser cutting machine;

[0056] e. Pickling and degreasing the preform...

Embodiment 2

[0064] see Figure 1-Figure 3 , a complex surface pneumatically loaded superplastic forming diffusion connection method, comprising the following steps:

[0065] a. First use the concave and convex die of the titanium alloy thermoforming mold to preform the upper panel, lower panel and auxiliary plate of the part, so that the preformed sheet material diffusion area profile is consistent with the part profile;

[0066] b. Drill two positioning holes according to the surface of the preformed part, and draw the outline line of the diffusion and handover area according to the solder resist spraying sample based on the positioning hole;

[0067] c. Carve criss-cross ventilation grooves on the auxiliary plate according to the contour line of the diffusion junction area, so that the position of each ventilation groove passes through the diffusion connection area;

[0068] d. The gas path is carved by a five-axis laser cutting machine;

[0069] e. Pickling and degreasing the preform...

Embodiment 3

[0080] see Figure 1-Figure 3 , a complex surface pneumatically loaded superplastic forming diffusion connection method, comprising the following steps:

[0081] a. First use the concave and convex die of the titanium alloy thermoforming mold to preform the upper panel, lower panel and auxiliary plate of the part, so that the preformed sheet material diffusion area profile is consistent with the part profile;

[0082] b. Drill two positioning holes according to the surface of the preformed part, and draw the outline line of the diffusion and handover area according to the solder resist spraying sample based on the positioning hole;

[0083] c. Carve criss-cross ventilation grooves on the auxiliary plate according to the contour line of the diffusion junction area, so that the position of each ventilation groove passes through the diffusion connection area;

[0084] d. The gas path is carved by a five-axis laser cutting machine;

[0085] e. Pickling and degreasing the preform...

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Abstract

The invention discloses a complex molded surface pneumatic loading superplastic forming diffusion bonding method, and belongs to the technical field of sheet metal hot working. The method is characterized by comprising the following steps of a, pre-forming an upper panel, a lower panel and an auxiliary plate of a part by adopting a concave-convex die of a titanium alloy hot forming die; b, drawing an outline of the diffusion junction area; c, carving crisscrossed vent grooves in the auxiliary plate; d, engraving an air path; e, spraying chemical milling glue on the part; f, carving a superplastic forming area pattern of the part; g, sealing and welding; h, completing diffusion connection of the upper panel and the lower panel; i, completing superplastic forming of the upper panel; and j, turning off a power supply of a machine tool, and taking out the part after the die is cooled to 650-700 DEG C. The problem that the welding rate of titanium alloy complex molded surface pneumatic loading superplastic forming diffusion bonding is not enough can be effectively solved, the service life of a superplastic forming diffusion bonding die can be prolonged, and the repair frequency of the die can be reduced.

Description

technical field [0001] The invention relates to the technical field of sheet metal thermal processing, in particular to a diffusion connection method for pneumatically loaded superplastic forming of complex profiles. Background technique [0002] Due to the specific strength and corrosion resistance of titanium alloys, as well as the superiority of the overall forming of the superplastic forming / diffusion bonding process, the titanium alloy superplastic forming diffusion bonding process can achieve weight reduction, and the overall structure can avoid multiple aerodynamic surfaces of the aircraft. Assembly step difference to enhance the stealth of the aircraft. [0003] Titanium alloy superplastic forming / diffusion bonding combined process is more and more widely used in aerospace field. With the continuous exploration and engineering application of superplastic forming / diffusion bonding technology, the structure of its parts has changed from single-layer board, double-laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 王建国王宇盛姜森宝门向南李光俊蒲荣森毛迪梁昭峰
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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