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Synchronous high pressure gas bulging forming method for large size titanium alloy double-layered cone member

A titanium alloy, large-scale technology, applied in the field of synchronous high-pressure inflation forming, can solve the problems of low component precision, poor structure performance, poor consistency of inner and outer layers, etc., achieve uniform fit clearance, high fit, and avoid shape distortion Effect

Active Publication Date: 2019-08-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems of low component precision, poor consistency of inner and outer layers and poor structure and performance in the existing large-scale titanium alloy curved busbar double-layer cone component manufacturing process, the inventors found that when high-pressure gas is used at a certain forming temperature When the inner cylinder and the outer cylinder are synchronously inflated, it can meet the precision requirements of the components, make the inner and outer layers consistent, and can also control the structure and properties of the components. Therefore, an improved large-scale titanium alloy curved generatrix is ​​proposed. Synchronous High Pressure Inflatable Forming Method of Double Cone Cylinder

Method used

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  • Synchronous high pressure gas bulging forming method for large size titanium alloy double-layered cone member
  • Synchronous high pressure gas bulging forming method for large size titanium alloy double-layered cone member
  • Synchronous high pressure gas bulging forming method for large size titanium alloy double-layered cone member

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Experimental program
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Effect test

Embodiment 1

[0105] Large-scale titanium alloy curved busbar double-layer cone component A, its inner and outer layers are made of TA15 titanium alloy, the wall thickness of the outer cone is 1mm, the inner wall thickness is 4mm, the large end of the outer cone The outer diameter is 1500mm, the small end outer diameter is 700mm and the height is 900mm. The steps of the synchronous high-pressure inflation forming method of the large-size titanium alloy curved busbar double-layer cone member are as follows:

[0106] (1) Blank making and moulding: After the titanium alloy inner fan-shaped slabs and outer fan-shaped slabs of corresponding sizes are curled by a plate rolling machine, laser welding is used to weld the inner conical tube blank 11 and the outer layer respectively. Tapered shell blank 12; the outer layer of tapered shell blank 12 is placed on the outside of the inner layer of tapered shell blank 11 to form a double-layer tapered shell blank, and the double-layer tapered shell blank...

Embodiment 2

[0113] Large-scale titanium alloy curved bus bar double-layer cone member B with a negative 10-degree angle. The inner and outer layers of the member are made of TA15 titanium alloy. The outer layer of the cone is 1mm thick, and the inner layer is 4mm thick , the maximum outer diameter of the large end of the outer cone is 1500mm, the outer diameter of the small end is 700mm and the height is 950mm. Mold structure such as Figure 9 shown. The steps of the synchronous high-pressure inflation forming method of the large-size titanium alloy curved generatrix double-layer cone member with a negative angle are as follows:

[0114] (1) Blank making and die loading: except adopting the titanium alloy inner layer fan-shaped slab and the outer layer fan-shaped slab of corresponding size, according to the step (1) of embodiment 1, make a double-layer conical cylinder with a negative angle Blank;

[0115] The double-layer conical shell blank is packed into the mold 1, and the upper mo...

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Abstract

The invention relates to a synchronous high pressure gas bulging forming method for a large size titanium alloy curvilinear generatrix double-layered cone member. High pressure thermal gas bulging forming is carried out on a double-layered cone blank at a special temperature, so that the curved shapes between the inner and outer cones are consistent, the fit clearance is small and a follow-up shape correcting step is not needed. The structure property is regulated then through insulating thermal treatment, the dimensional accuracy is prevented from being damaged by thermal treatment after forming, and the shape accuracy and the structure property are regulated integrally.

Description

technical field [0001] The invention belongs to the technical field of plastic forming manufacturing, and relates to a synchronous high-pressure air expansion forming method for manufacturing titanium alloy curved busbar double-layer cone components. Background technique [0002] Large-scale titanium alloy curved busbar double-layer cone components are commonly used in aircraft. In order to meet the needs of high-speed aerodynamic performance and high-temperature and high-pressure service performance, the dimensional accuracy and structural performance of such components are very high. figure 1 A typical large-scale titanium alloy curved generatrix double-layer cone member is shown, which is composed of thin-walled curved surface members with curved generatrix frustum contours in the inner layer and the outer layer. The minimum wall thickness of this type of component is 1mm, and the maximum diameter is 3000mm, so the maximum diameter-thickness ratio can reach more than 3000...

Claims

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Application Information

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IPC IPC(8): B21D26/033B21D26/041B21D26/045
CPCB21D26/033B21D26/041B21D26/045
Inventor 刘钢苑世剑王小松王克环
Owner HARBIN INST OF TECH
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