Diffusion welding method for fixing supporting plate with supporting plate head

A technology of diffusion welding and support plate head, applied in the field of aero-engine, can solve the problems of welding deformation of support plate and support plate head, affecting the overall quality, bulging, etc., to reduce welding deformation, improve overall quality, and optimize the effect of the main structure.

Active Publication Date: 2018-05-11
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the fixed support plate components of the air intake casing of the aero-engine are manufactured by multi-layer superplastic forming diffusion welding. The support plate and the support plate head are connected together by argon arc welding, but it is found that There are bulges and cracks in the triangular area of ​​the fixed support plate assembly, and the support plate and the support plate head are prone to welding deformation and other problems, which seriously affect the overall quality

Method used

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  • Diffusion welding method for fixing supporting plate with supporting plate head
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  • Diffusion welding method for fixing supporting plate with supporting plate head

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A diffusion welding method with a support plate head to fix a support plate, the schematic diagram of the welding process is as follows figure 1 shown, including the following steps:

[0051] Step 1, wool wire cutting:

[0052] In order to ensure the same performance and structure of the base metal before welding, the forging blank is cut into two symmetrical pieces, and ultrasonic inspection is carried out to ensure that there is no defect in the base metal, and the fixed support plate cavity with the support plate head is processed separately. into a corresponding shape, and the cavity is formed by groove grinding;

[0053] Step 2, grinding the surface to be welded:

[0054] Grind the surface of the surface to be welded to form a fixed support plate with a support plate head after grinding, and ensure that the parallelism of the surface to be welded after grinding is not greater than 0.03mm, and the roughness of the surface to be welded of the blade is not greater t...

Embodiment 2

[0073] A diffusion welding method with a support plate head to fix a support plate, the schematic diagram of the welding process is as follows figure 1 shown, including the following steps:

[0074] Step 1, wool wire cutting:

[0075] In order to ensure the same performance and structure of the base metal before welding, the forging blank is cut into two symmetrical pieces, and ultrasonic inspection is carried out to ensure that there is no defect in the base metal, and the fixed support plate cavity with the support plate head is processed separately. into a corresponding shape, and the cavity is formed by groove grinding;

[0076] Step 2, grinding the surface to be welded:

[0077] Grind the surface of the surface to be welded to form a fixed support plate with a support plate head after grinding, and ensure that the parallelism of the surface to be welded after grinding is not greater than 0.03mm, and the roughness of the surface to be welded of the blade is not greater t...

Embodiment 3

[0096] A diffusion welding method with a support plate head to fix a support plate, the schematic diagram of the welding process is as follows figure 1 shown, including the following steps:

[0097] Step 1, wool wire cutting:

[0098] In order to ensure the same performance and structure of the base metal before welding, the forging blank is cut into two symmetrical pieces, and ultrasonic inspection is carried out to ensure that there is no defect in the base metal, and the fixed support plate cavity with the support plate head is processed separately. into a corresponding shape, and the cavity is formed by groove grinding;

[0099] Step 2, grinding the surface to be welded:

[0100] Grind the surface of the surface to be welded to form a fixed support plate with a support plate head after grinding, and ensure that the parallelism of the surface to be welded after grinding is not greater than 0.03mm, and the roughness of the surface to be welded of the blade is not greater t...

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Abstract

The invention discloses a diffusion welding method for a fixing supporting plate with a supporting plate head. The method specifically comprises the steps that linear cutting is carried out on a blank, grinding machining and other treatment are carried out on the surface of a to-be-welded surface, assembling positioning is carried out before welding, a compression amount supporting block is presetto ensure the compression amount, the corresponding welding parameters are controlled to carry out diffusion welding, the compression amount is checked after welding, welding seam metallographic inspection is carried out and other steps to complete the diffusion welding for the fixing supporting plate with the supporting plate head, wherein the welding percent of pass is larger than 95%. According to the method, the diffusion welding method is adopted to complete welding of the fixing supporting plate with the supporting plate head, the diffusion welding link for portions between layered plates of a conventional three-layer plate superplastic forming diffusion welding supporting plate is removed, hollowing of a strengthening rib triangular region of the inner cavity of the supporting plate is avoided, the faults of bulging and cracking of multi-layer plate diffusion connection fixing supporting plate are overcome, meanwhile, the supporting plate and the supporting plate head are of anintegral structure; and the diffusion welding process for the fixing supporting plate with the supporting plate head has the multiple advantages that the technological process is simple, the qualityis easy to control, the quality is stable, the consistency of inner molded surface and the outer molded surface of the fixing supporting plate is good, the size precision is high, and the like.

Description

Technical field: [0001] The invention belongs to the technical field of aero-engines, and in particular relates to a diffusion welding method for fixing a support plate with a support plate head. Background technique: [0002] At present, most of the fixed support plate components of aero-engine intake casing are made of multi-layer superplastic forming diffusion welding. There are bulges and cracks in the triangle area of ​​the fixed support plate assembly, and the support plate and the support plate head are prone to welding deformation and other problems, which seriously affect the overall quality. Invention content: [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and to provide a diffusion welding method for fixing a support plate with a support plate head, which cancels the diffusion connection link between the original superplastic forming diffusion welding fixed support plate process layers, and directl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/14B23K20/24B23P15/00
CPCB23K20/14B23K20/24B23P15/00
Inventor 张磊先杜静宋文清邵天巍金莹
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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