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

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...

AI Technical Summary

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