Assembling and welding machining method for semi-closed flame tube with deep U-shaped rotary section

Abstract

The invention discloses an assembling and welding machining method for a semi-closed flame tube with a deep U-shaped rotary section, and belongs to the technical field of aero-engine machining. The method comprises the steps of firstly, assembling and welding a flame tube inner-ring middle segment, a flame tube inner-ring rear segment and a flame tube inner-ring rear mounting edge to form an innerwall component by using an inner wall component welding clamp, and then conducting first-time heat treatment; secondly, assembling and welding a flame tube front wall and a flame tube inner-ring front segment to form a front wall component by using a front wall component welding clamp, and then conducting second-time heat treatment; assembling and welding the inner wall component and the front wall component by using an inner wall and front wall assembly component welding clamp, and then conducting third-time heat treatment; assembling and welding a flame tube outer ring and a flame tube outer ring mounting edge again, then welding an assembly by using an assembly welding clamp, and then conducting fourth-time heat treatment by using a heat treatment clamp; and finally, lathing an end surface by using a lathing clamp. The method has the advantages of being small in machining difficulty, convenient to operate and reliable in 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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