A method for manufacturing a large-diameter aluminum alloy high-performance cylindrical shell

A manufacturing method and aluminum alloy technology are applied in the manufacturing field of large-diameter aluminum alloy high-performance cylindrical shells, which can solve the problems of internal quality requirements, mechanical performance stability being difficult to meet requirements, detection difficulties, and late exposure.

Active Publication Date: 2019-02-01
CAPITAL AEROSPACE MACHINERY +1
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Problems solved by technology

However, the overall casting scheme has a certain impact on the mechanical properties, elongation and stability of the material due to casting defects, such as microporosity and shrinkage cavity.
In addition, the detection of casting defects in complex areas is difficult, and subsequent machining often exposes internal defects, causing pits on the butt surface, etc., and the defects are exposed late in the production process, which has a great impact on production costs and production cycles
It is difficult to meet the needs of shell structure manufacturing with high internal quality requirements and good mechanical performance stability
[0003] Spacecraft stages are connected by the interstage shell, which is a relatively weak part. Under the impact of strong pressure and bending moment load, the interstage shell is prone to failure and destruction

Method used

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Embodiment Construction

[0033] The technical solution of the present invention will be described in detail below in conjunction with the embodiments.

[0034] Aluminum alloy high-performance cylindrical shell manufacturing technical solutions mainly include ring rolling forming of tall cylindrical ring parts, spinning forming of thick-walled ring parts, electron beam welding of medium and large thickness aluminum alloys and coordination research with heat treatment mechanism, heat treatment of cylindrical shells The directions of anti-deformation and stress relief are gradually carried out, and the method of top-down decomposition and bottom-up bedding is adopted to break through the ellipticity control technology of ring rolling of high-strength aluminum alloy cylindrical parts, the control of spinning defects of thick-walled aluminum alloy cylindrical blanks, Key technologies such as large-scale aluminum alloy shell sections with few defects and high-quality welding, and then realize the development...

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Abstract

The invention belongs to the technical field of manufacturing of large-diameter aluminum alloy cylindrical shells, and particularly relates to a manufacturing method of a large-diameter aluminum alloy high-performance cylindrical shell. According to the technical scheme, plastic forming is adopted for replacing casting, and process combination of ring rolling, spinning and electron beam welding is researched; when a large aluminum alloy cylindrical shell section is manufactured, a cylindrical ring part in the middle is researched through the plastic forming scheme comprising ring rolling and spinning carried out successively, then, two end frames are welded to electron beams at the two ends of the cylindrical ring part correspondingly, the shape-performance state of the product is controlled, and the requirements for the using performance of the product can be met.

Description

technical field [0001] The invention belongs to the technical field of manufacturing a large-diameter aluminum alloy cylindrical shell, and in particular relates to a method for manufacturing a large-diameter aluminum alloy high-performance cylindrical shell. Background technique [0002] The high-strength aluminum alloy shell structure manufacturing technology is an important part of the spacecraft structure manufacturing technology system. The shell section of traditional spacecraft widely adopts integral casting machining and forming process scheme, and integral casting has the advantages of short production cycle and low cost. However, due to casting defects, such as micro-porosity and shrinkage cavity, the overall casting scheme has a certain impact on the mechanical properties, elongation and stability of the material. In addition, the detection of casting defects in complex areas is difficult, and subsequent machining often exposes internal defects, causing pits on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 李曙光赵衍华谢美蓉王恒强张益坤祝世强杨国平李杰叶茂刘杰张晓玲
Owner CAPITAL AEROSPACE MACHINERY
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