Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of titanium alloy hollow structure

A hollow structure and titanium alloy technology, which is applied in the field of preparation of titanium alloy hollow structures, can solve problems such as increased equipment tonnage requirements, harsh load conditions, and deformation of ribs

Active Publication Date: 2019-07-02
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
View PDF10 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. In the prior art, the titanium alloy hollow structure prepared by mold needs to be pressurized by a hydraulic press. Generally, the pressurized load is much greater than the actual diffusion connection pressure, which can easily lead to deformation of the ribs during the diffusion connection process, resulting in distortion of the shape of the parts;
[0004] 2. When the hydraulic press is used to pressurize, the load direction is loaded along one direction, and there is no pressure on the side of the loaded part and the side of the mold, resulting in relatively harsh loading conditions for the mold, resulting in a reduction in the life of the mold;
[0005] 3. Limited by the tonnage of the hydraulic press and the size of the table, the number of parts formed in one furnace is limited, and the forming efficiency is low. If multiple parts are formed at one time, the tonnage requirements for the equipment will double as the size of the diffusion connection die increases;

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of titanium alloy hollow structure
  • Preparation method of titanium alloy hollow structure
  • Preparation method of titanium alloy hollow structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1, see figure 1 As shown, the preparation method at least includes the following steps S110 to S150:

[0046] Step S110 is to prepare the panel and the core body, and process the upper panel, the lower panel and the core body for preparing the titanium alloy hollow structure, the upper panel and the lower panel are titanium alloy flat plates with a predetermined thickness, and the core The body is a hollow grid plate with a predetermined thickness.

[0047] In the specific implementation of this step, the upper panel, the lower panel and the core made of titanium alloy can be processed by numerical control machining, high pressure water cutting or wire cutting. It is also necessary to clean the surface of the processed upper panel, the lower panel and the core body. Specifically, the surface of each processed titanium alloy plate can be degreased and dusted by chemical cleaning, so as to improve Subsequent Diffusion Connection Quality and Efficiency. It shoul...

Embodiment 2

[0053] Example 2, see figure 2 As shown in the schematic diagram of diffusion connection of split parts, the preparation method at least includes the following steps S110 to S140:

[0054] Step S110 is to prepare the prefabricated body of the panel and the core body, and process two split panels with ribbed structure on the inner side by using the method of numerical control machining, and the outer side is a plane or curved surface, and the rib structure on the inner side of the two is docked The core body of the preform is formed together, and the outer surfaces are respectively the upper panel and the lower panel of the preform, and then sealing and welding are performed. It should be noted that in this embodiment, it is only necessary to process two split inner side ribbed structural panels, and there is no need to separately process the panel and the core plate, and it is only necessary to butt the two processed inner side ribs when forming The core body of the hollow s...

Embodiment 3

[0059] Example 3, see Figure 5 ~ Figure 10 , the preparation method at least includes the following steps S110 to S160:

[0060] Step S110 is to prepare the panel and the core plate, and process the upper panel, the lower panel and the core plate for preparing the titanium alloy hollow structure, and the upper panel, the lower panel and the core plate are all titanium alloy flat plates with a predetermined thickness ( see Figure 6 Core board 8), the upper panel and the lower panel are grooved frame plate structures (see Figure 6 The upper panel 7 of the middle channel frame plate structure and the lower panel 9 of the channel frame plate structure).

[0061] Step S120 is the diffusion connection of the core boards. Two or more non-connecting surfaces of the core boards are coated with solder stopper and then laminated. After sealing, welding and vacuum packaging, the laminated core boards are diffused and connected, and then the The seals of the connected laminate cores ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of a titanium alloy hollow structure. The titanium alloy hollow structure comprises a middle core body and two side panels. The preparation method of thetitanium alloy hollow structure comprises the following steps that a corresponding upper die assembly and a corresponding lower die assembly are placed on the outer sides of an upper panel and a lowerpanel of a preformed blank with the hollow structure, and the upper die assembly and the lower die assembly each comprise a detachable die and a die jacket, wherein the inner side surface of the dieis matched with the outer surface of the panel on the corresponding side for balancing applied pressure during forming to prevent collapse, the die jacket is of a semi-open structure for covering thedie on the corresponding side, the edge of the die jacket with the half-open structure and the edge of the upper panel or the edge of the lower panel are sealed and welded together, and the thicknessof the die is larger than that of the die jacket.

Description

technical field [0001] The invention relates to the technical field of superplastic forming / diffusion connection, in particular to a method for preparing a titanium alloy hollow structure. Background technique [0002] There are many titanium alloy hollow structures in aircraft and engines, and the commonly used preparation methods mainly include molded preparation methods such as diffusion bonding, superplastic forming / diffusion bonding, etc. For example, the structure of the rudder surface is prepared by the method of split structure diffusion connection and superplastic forming / diffusion connection. However, when the titanium alloy hollow structure is prepared by the molded method of the prior art, especially the four-layer hollow structure, there are mainly The following questions: [0003] 1. In the prior art, the titanium alloy hollow structure prepared by mold needs to be pressurized by a hydraulic press. Generally, the pressurized load is much greater than the actua...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 赵冰李志强张纪春梁田刘胜京
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST