Welding fixture and method of brazing large-scale aluminum alloy curved skin and ribbed skeleton structure

A brazing method and skeleton structure technology, applied in the direction of welding/welding/cutting items, welding equipment, auxiliary welding equipment, etc., can solve problems such as unsuitable components and deformation, and achieve improved fluidity, high efficiency, and high welding accuracy Effect

Active Publication Date: 2020-03-24
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing brazing method is not suitable for the brazing of large-size aluminum alloy curved surface skin and ribbed skeleton structure or the deformation of components after brazing, and to provide a large-size aluminum alloy curved surface skin Brazing method with ribbed skeleton structure

Method used

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  • Welding fixture and method of brazing large-scale aluminum alloy curved skin and ribbed skeleton structure
  • Welding fixture and method of brazing large-scale aluminum alloy curved skin and ribbed skeleton structure
  • Welding fixture and method of brazing large-scale aluminum alloy curved skin and ribbed skeleton structure

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specific Embodiment approach 1

[0027] Specific embodiment 1: In this embodiment, a welding jig is a semi-circular pipe structure, and the welding jig includes an insulation layer 1, a heating blanket 2, a limit mold 3, a mold pull rod 4, a pressure gasket 5 and a pressure screw 6; A heating blanket 2 is attached to the inner surface of the insulation layer 1, and the heating blanket 2 is covered on the outer surface of the limiting mold 3; on the upper edge of the limiting mold 3, a plurality of mold tie rods 4 are horizontally placed at intervals in parallel, and each mold tie rod 4 Two pressure screw rods 6 are threadedly connected to the bottom, and the lower ends of the two pressure screw rods 6 are fixedly connected to the pressure pads 5 . Wherein the pressure gasket 5 is attached to the workpiece 7 to be welded on the limit mold 3 .

[0028] The materials of the press screw 6 and the press pad 5 in this embodiment are stainless steel, and the press pad 5 is directly placed on the surface of the workp...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment differs from Embodiment 1 in that the insulation layer is made of asbestos. Others are the same as the first embodiment.

specific Embodiment approach 3

[0030] Specific implementation mode three: In this implementation mode, the method of brazing a large-size aluminum alloy curved surface skin and a ribbed skeleton structure with a welding fixture is carried out according to the following steps:

[0031] 1. Perform pre-weld heat treatment on the aluminum alloy skin and ribbed frame;

[0032] 2. Grinding and cleaning the heat-treated aluminum alloy skin and ribbed frame before welding;

[0033] 3. Mark the position to be welded on the aluminum alloy skin after heat treatment;

[0034] 4. Coating the aluminum alloy skin and the skeleton with ribs separately: place the aluminum alloy skin on the heating table to heat, and after reaching the preset temperature, apply the brazing material in step 3 to determine place the ribbed frame on the heating table to heat, and after reaching the preset temperature, coat the brazing material on the surface of the vertical rib of the ribbed frame; during the solder coating process, use ultras...

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Abstract

The invention relates to a welding fixture and a method for brazing a large-size aluminum alloy curved skin and a ribbed skeleton structure. The purpose of the welding fixture and the method is to solve the problem that the existing brazing method is not suitable for the brazing of the large-size aluminum alloy curved skin and the ribbed skeleton structure or the deformation of a component is occurred after brazing. The welding fixture comprises a heat preservation layer, a heating blanket, a limiting mold, a mold pull rod, a pressurizing gasket and a pressurizing screw rod; and the method comprises the following steps that heat treatment before welding, polishing and cleaning, brazing filler metal coating are carried out for the aluminum alloy curved skin and the ribbed skeleton structure, then brazing is carried out through using the welding fixture. According to the welding fixture and the method for brazing the large-size aluminum alloy curved skin and the ribbed skeleton structure, the size of the weldable component is large, the deformation amount in the process of workpiece welding is reduced, the welding precision is high, and the welding fixture and the method is applied to the field of aluminum alloy brazing.

Description

technical field [0001] The invention relates to a welding jig and a method for brazing a large-size aluminum alloy curved surface skin and a skeleton structure with ribs. Background technique [0002] Aluminum alloys have excellent comprehensive properties such as high strength, low density, good thermal conductivity, and strong machinability, and are widely used in the fields of automobiles, aerospace, and electronics. On the basis of ensuring the structural strength, in order to further meet the needs of lightweight development, many parts are designed as a hollow structure with the characteristics of a closed cavity. The side is the skin, and the two are combined into one body by welding. In addition, in addition to the common flat plate structure, this closed cavity often presents a curved surface structure with a certain curvature, that is, the curved surface skin is welded to the web plate of the ribbed skeleton structure with a corresponding curvature. [0003] From...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K3/08B23K3/04B23K37/04B23K1/00B23K1/06B23K1/20
CPCB23K1/0008B23K1/06B23K1/20B23K3/04B23K3/087B23K2103/10
Inventor 许志武李政玮李大成闫久春于江祥
Owner HARBIN INST OF TECH
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