Overall manufacturing method for large-size thin-walled annular belt type oxygen-enhancing frame

Abstract

Disclosed is an overall manufacturing method for a large-size thin-walled annular belt type oxygen-enhancing frame. The overall manufacturing method comprises the following steps that a special substrate for laser melting deposition is designed; up-and-down segmentation is carried out along the wall thickness sudden changing portion of the oxygen-enhancing frame; a lower-segment part is formed byselecting a large-power large-scanning-speed laser melting deposition process parameter and a corresponding scanning strategy; laser machining program codes of all slice layers of the upper and lowersegments are obtained by utilizing slice software and are introduced into equipment to carry out laser melting deposition forming of the lower-segment portion first; stress relieving annealing is carried out after outward taking; then the lower segment end surface is taken as a substrate to complete deposition of the upper-segment portion, and heat treatment and machining are carried out to obtaina part under a final state. The overall manufacturing method solves the problems that a current forging and machining method is long in machining period, low in material utilization ratio and severein stress deformation, and the high-performance, small-deformation and small-allowance forming of the oxygen-enhancing frame part is realized.

Description

technical field [0001] The invention relates to an overall manufacturing method of an oxygen-reinforced frame, which belongs to the field of mechanical processing. Background technique [0002] As an important part of the propellant supply system of the liquid rocket engine, the common-bottom tank has been successfully applied in the flight launch of many types of Long March series rockets and weapons. According to the development requirements of a new generation of liquid rocket engine with high thrust, short cycle and low cost, the design structure of the common bottom tank is characterized by large size, complexity, thin wall and light weight, and the oxygen reinforced frame part is used as the common bottom tank device. The main load-bearing component of the tank is a large-scale, thin-walled ring structure, which has high requirements for mechanical properties, and plays a role in ensuring the strength, safety and stability of the thin-walled storage tank. [0003] At ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem of the present invention is: to overcome the shortcomings of the prior art, to prepare a TC4 titanium alloy large-scale thin-walled annular oxygen-reinforced frame by using laser melting deposition forming technology, and to realize the fast, high-performance, small-sized oxygen-reinforced frame member Deformation and small machining allowance forming provide a new method for the manufacture of large-scale thin-walled annular oxygen-reinforced frames

Images