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A kind of aluminum alloy diffusion welding device and aluminum alloy diffusion welding method

A technology of diffusion welding and aluminum alloy, which is applied in the direction of welding/welding/cutting items, welding equipment, non-electric welding equipment, etc. It can solve problems such as hole defects, electrochemical corrosion, and the service life of aluminum alloy materials that affect the strength of joints, etc., to increase Large pressure, the effect of improving the connection strength

Active Publication Date: 2021-10-22
东莞市发奕林精密机电设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Diffusion welding of aluminum alloys generally relies on special diffusion equipment—diffusion furnaces. Due to the difficulty in manufacturing diffusion furnace equipment, the scale of diffusion furnace equipment is small, and it is only used for diffusion welding of small-sized aluminum alloy materials; currently, large-scale The aluminum alloy materials are mainly connected by traditional brazing, but during brazing, the alloy elements in the brazing filler metal are prone to electrochemical corrosion with the aluminum alloy, and the large-area brazing process is easy to be in the solidification stage of the brazing filler metal. , forming hole defects at the brazed weld, which affects the strength of the joint and the service life of the aluminum alloy material, and affects the use of the aluminum alloy material

Method used

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  • A kind of aluminum alloy diffusion welding device and aluminum alloy diffusion welding method
  • A kind of aluminum alloy diffusion welding device and aluminum alloy diffusion welding method

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Embodiment 1

[0038] In order to solve the current problem that large-sized aluminum alloy materials cannot be diffusion-welded, this embodiment provides an aluminum alloy diffusion welding device, through which the aluminum alloy diffusion device can realize diffusion welding of large-sized aluminum alloy materials.

[0039] This embodiment provides an aluminum alloy diffusion welding device, which includes a fixture, see figure 1 As shown, the jig includes an upper plate 1, a lower plate 2 and at least two side plates 3; wherein the upper plate 1, the lower plate 2, and the side plates 3 are all plate-shaped structures with a certain thickness, and the upper plate 1 and the lower plate 2. The size of the side plate 3 is determined according to the size of the workpiece 5 to be welded; the linear expansion coefficient of the fixture is smaller than that of the aluminum alloy.

[0040] When using the aluminum alloy diffusion welding device, the lower plate 2 is connected to the lower end of...

Embodiment 2

[0053] On the basis of embodiment 1, see figure 1 As shown, in the aluminum alloy diffusion welding device provided in this embodiment, the jig further includes a pressure plate 4 , and when using the aluminum alloy diffusion welding device, the pressure plate 4 is placed between the workpiece 5 to be welded and the upper plate 1 .

[0054] In order to ensure the additional pressure due to the coefficient of linear expansion when the weldment 5 is to be diffused welded, it is necessary to select a material with a coefficient of linear expansion not less than that of the side plate 3 as the pressure plate 4; if the coefficient of linear expansion of the pressure plate 4 is smaller than that of the side plate, During diffusion welding, the expansion degree of the side plate 3 will be greater than that of the pressure plate 4, resulting in an increase in the distance between the upper plate 1 and the lower plate 2, reducing the additional pressure exerted by the upper plate 1 on t...

Embodiment 3

[0057] On the basis of Embodiment 2, the number of side plates 3 in this embodiment is four, and the four side plates 3 are all vertically connected to the bottom plate 2, and the adjacent side plates 3 are perpendicular to each other, but are not connected, that is, they are connected to each other. There are gaps between the adjacent side plates 3; the four side plates 3 and the bottom plate 2 together form a square structure, and the four side plates 3 jointly restrict the plastically deformed parts 5 to be welded during diffusion welding. , Adjusting function, avoiding the severe plastic deformation of the weldment 5 during diffusion welding, which will cause the failure of diffusion welding, and reduce the deformation of aluminum alloy when using this fixture for diffusion welding.

[0058] see figure 2 As shown, because the side plate 3 will also expand to a certain extent during the diffusion welding process, in order to avoid deformation caused by the expansion of the...

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Abstract

The invention discloses an aluminum alloy diffusion welding device and an aluminum alloy diffusion welding method, and relates to the technical field of diffusion welding. The aluminum alloy diffusion welding device includes a fixture, and the linear expansion coefficient of the fixture is smaller than that of the aluminum alloy; The fixture includes an upper plate, a lower plate and at least two side plates; when using the aluminum alloy diffusion welding device, the lower plate is respectively connected to the lower ends of the side plates through fasteners, and the upper The plate is connected to the upper end of the side plate, and a hole is provided between the adjacent side plates, and the upper plate, the lower plate and the adjacent side plates are enclosed to form a cavity; the parts to be welded are placed on inside the cavity. The aluminum alloy diffusion welding device provided by the invention can realize the diffusion welding of large-scale aluminum alloy materials and get rid of the dependence of diffusion welding on a diffusion furnace.

Description

technical field [0001] The invention relates to the technical field of diffusion welding, in particular to an aluminum alloy diffusion welding device and an aluminum alloy diffusion welding method. Background technique [0002] Diffusion welding is a kind of pressure welding, which is widely used in electronics industry, nuclear energy industry, aerospace and other fields due to its wide range of materials and high welding quality. [0003] Diffusion welding of aluminum alloys generally relies on special diffusion equipment—diffusion furnaces. Due to the difficulty in manufacturing diffusion furnace equipment, the scale of diffusion furnace equipment is small, and it is only used for diffusion welding of small-sized aluminum alloy materials; currently, large-scale The aluminum alloy materials are mainly connected by traditional brazing, but during brazing, the alloy elements in the brazing filler metal are prone to electrochemical corrosion with the aluminum alloy, and the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/02B23K20/14B23K20/24B23K20/26B23K103/10
CPCB23K20/023B23K20/14B23K20/24B23K20/26
Inventor 林铁松白松义何鹏
Owner 东莞市发奕林精密机电设备有限公司
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