A deep U-shaped rotary cross-section semi-closed flame cylinder assembly welding processing method

Abstract

The invention relates to a deep U-shaped rotary section semi-closed flame tube assembly welding processing method, which belongs to the technical field of aero-engine processing. The method includes firstly using the inner wall component welding jig to assemble and weld the middle section of the flame tube inner ring, the rear section of the flame tube inner ring and the rear mounting edge of the flame tube inner ring as the inner wall component, and then heat treatment for the first time; secondly, use the front wall component welding jig to assemble and weld The front wall of the flame tube and the front part of the inner ring of the flame tube are the front wall assembly, and then the second heat treatment is performed. Use the inner wall-front wall assembly welding fixture to assemble and weld the inner wall assembly and the front wall assembly, and then perform the third heat treatment; assemble the flame again The outer ring of the tube and the outer ring of the flame tube are installed, and then the assembly is welded with the assembly welding jig, and then the fourth heat treatment is performed with the heat treatment jig; finally, the end face is turned with the turning jig. The method has the advantages of small processing difficulty, convenient operation and reliable quality.

Description

technical field [0001] The invention relates to the processing of turbojet engine parts, in particular to a deep U-shaped rotary cross-section semi-closed flame tube assembly and welding processing method, which belongs to the technical field of aero-engine processing. Background technique [0002] The combustor flame tube is the area where the aero-engine organizes combustion, and this area has a very high gas temperature. The cooling technology of the flame tube is directly related to the life and reliability of the combustion chamber, and affects the thermal efficiency of the entire engine. With the improvement of the performance of the turbojet engine, the pressure ratio of the engine and the rise of the combustion chamber gradually increase, which makes the wall of the flame tube bear a greater heat load, which puts forward higher requirements for the structure of the flame tube. [0003] There is a new type of flame cylinder, the structure of which is complex, and it ...

AI Technical Summary

Problems solved by technology

Affected by the space structure, the welding operation space is greatly limited, and it is very difficult to position and clamp parts and take out parts after welding. At the same time, the rigidity of thin-walled parts is poor, and cumulative welding stress will be generated in the case of multiple welding. It leads to welding deformation, and it is difficult to guarantee the shape tolerance and dimensional accuracy; in addition, the outer circle at one end of the flame tube and the inner hole at the other end have high shape tolerance and dimensional accuracy requirements, which are difficult to achieve by conventional welding methods

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