Thin-walled air coolant guide tube connecting method

Abstract

The invention relates to a thin-walled air coolant guide tube connecting method. The thin-walled air coolant guide tube connecting method comprises the following steps: polishing, cleaning and blow-drying connectors of thin-walled air coolant guide tubes; inserting a core of a welding fixture into a part from a run-off plate end, enabling a guide tube outline, at the run-off plate end, of the part to be parallel and level to a mark of the core, and placing in a groove of the welding fixture and clamping; clamping a laser welding head by using an industrial robot, and aligning a guiding light spot of a laser to a welded joint; running a procedure in an idle manner and observing the guiding light spot, and ensuring the guiding light spot to always cover the welded joint; welding of air coolant guide tubes: running a welding procedure to weld the air coolant guide tubes, wherein the diameter of a nozzle is 10 mm, and the distance from the nozzle to a welded surface is 4 mm; after welding is finished, immediately taking out the core, clamping the run-off plate end on jaw calipers, and withdrawing the part; and cleaning after welding. By the method, the welded joint with good forming quality and consistency can be obtained, shortcomings of welding missing, burning-through, main body burning and the like are avoided, meanwhile, welding deformation is controlled effectively, and profile precision of blade basins and blade backs of the air coolant guide tubes is guaranteed.

Description

technical field [0001] The invention relates to a welding technology of an aero-engine turbine part, in particular to a connection method of a thin-wall cold air duct. Background technique [0002] As an important part of the turbine components of the aero-engine, the cold air duct constitutes a part of the air flow path of the turbine components and plays a vital role in the cooling process of the turbine components. [0003] The cold air duct is a special-shaped twisted structure. Compared with similar parts, the structure is more complicated; any cross-section of the cold air duct is half-crescent; from the outer ring end to the inner ring end, the cross-section twists and converges. In order to ensure the cooling effect of the duct air film hole group and the assembly requirements with the hollow blade, the blade basin and the blade back of the air-conditioning duct have strict profile control requirements. The number of profile coordinate control points exceeds 1000 poi...

AI Technical Summary

Problems solved by technology

[0010] In view of the deficiencies in the prior art, such as the poor quality and consistency of the welding seam of the thin-walled cold air duct of the aero-engine, and the difficulty in ensuring the precision of the blade basin and blade back profile, the problem to be solved by the invention is to provide a method to avoid weld leakage, burn-through, and main body burns. The connection method of the thin-walled air-conditioning duct to ensure the surface accuracy of the air-conditioning duct blade pot and the blade back

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