Air duct device of superplastic forming hollow structure and air flow pressure differentiating method

A technology of hollow structure and superplastic forming, which is applied in the field of superplastic forming hollow structure airway devices, which can solve the problems of thinning of vertical ribs, failure of smooth expansion and rupture of airway grooves, etc.
CN107983818AActive Publication Date: 2018-05-04AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
Publication Date
2018-05-04

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Abstract

The invention relates to an air duct device of a superplastic forming hollow structure. The technical key point of the device is as follows: the device comprises an outer layer plate and an inner layer plate, wherein a rib lattice is arranged between the outer layer plate and the inner layer plate, and one end of the rib lattice is connected to a gas storage cavity. An air flow pressure differentiating method of the air duct of the superplastic forming hollow structure comprises the following steps: S1, forming the rib lattice; S2, Pre-forming the gas storage cavity in the front end of the riblattice; S3, pre-forming an air flow passageway connected to the rib lattice in the side wall of the gas storage cavity; and S4, dividing the air flow in the gas storage cavity by means of impact action of blocking a high pressure air flow to blow up the air flow, and reducing the pressure first and then blowing up second. According to the technical scheme, through the gas storage cavity, the region is expanded quickly in volume to reduce the pressure of the air flow and the air flow is stably divided into vertical rib cavities, so that the vertical rib forming process and quality are stabilized and controlled; by pre-forming the gas storage cavity to cut off the expanded air flow, quick formation of the rib lattice caused by the high pressure air flow is reduced; the blown-up gas is divided into the rib lattice cavities from the gas storage cavity, so that the air pressure differences among the vertical rib forming cavity lattices are reduced.
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Description

technical field

[0001] The invention relates to the technical field of superplastic forming devices and methods, in particular to a superplastic forming hollow structure airway device and an airflow partial pressure method. Background technique

[0002] In the prior art, superplastic forming and diffusion bonding consist of three-layer structural blanks, such as Figure 5 shown. Solder stop flux is coated between the three slabs to form a specified internal cavity and stud structure. Among them, there is a rib grid at the front end of the solder stopper, which is used to decompose the blowing gas and guide it into the middle of each vertical rib to form small cavities, such as Figure 6 shown.

[0003] In the SPF / DB three-layer structure forming process, the three slabs are combined and sealed and vacuumized to form a closed bag. First, the diffusion connection process is carried out. Outside the area, the metal layers are welded and the interface disappears; the airway g...

Claims

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