Thin-walled air coolant guide tube connecting method

A technology of cold air duct and connection method, which is applied in welding equipment, tubular articles, laser welding equipment, etc., can solve the problems of difficult to guarantee profile accuracy, poor forming quality and consistency, and achieve control of welding deformation, good consistency, and reduction in welding. Effect of small welding deformation

Inactive Publication Date: 2017-02-22
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 proble

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  • Thin-walled air coolant guide tube connecting method
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  • Thin-walled air coolant guide tube connecting method

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Embodiment Construction

[0032] The present invention will be further elaborated below in conjunction with the accompanying drawings of the description.

[0033] This example Figure 1A , 1B shown

[0034] (1) Parts condition

[0035] As shown in Figure 1, it is a cold air duct to be welded. The raw material is GH188 strip with a thickness of 0.3 mm. The material is prepared by laser cutting, and it is formed by two sheet metal bending. The width of the starting part and the arc receiving plate are both 4mm, and the length is greater than 6mm.

[0036] (2) Implementation

[0037] Step 1: Joint preparation

[0038] Mechanical polishing is used to process the joints to remove the laser-cut remelting layer, spatter, oxide layer, etc. Use acetone or alcohol to clean the butt joint surface of the parts, the front and back of the welding surface and the fillet transition; after cleaning, dry the parts with a compressed air gun.

[0039] Step 2: Clamping and positioning of the air-conditioning duct

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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...

Claims

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Application Information

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IPC IPC(8): B23K26/24B23K26/14B23K26/60
CPCB23K26/24B23K26/14B23K26/60B23K2101/001B23K2101/06
Inventor 赵伟杨烁曲伸宋文清李晓光
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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