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Welding connection method for aluminum alloy pipelines of different diameters

A welding connection, aluminum alloy technology, applied in the direction of welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of reduced mechanical properties, large expansion coefficient, harmful performance, etc., to increase the effective bearing area, improve welding strength, Operation implements simple effects

Active Publication Date: 2015-07-08
东和管道科技(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] 2. In addition, aluminum and its alloys have a large coefficient of linear expansion and strong thermal conductivity, and are prone to warping and deformation during welding. The traditional fusion welding seam causes the aluminum alloy weld seam to produce a casting structure that is harmful to performance. At the same time, the thermal influence of the joint Extensive softening in the region will greatly reduce its mechanical properties

Method used

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  • Welding connection method for aluminum alloy pipelines of different diameters
  • Welding connection method for aluminum alloy pipelines of different diameters

Examples

Experimental program
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Effect test

Embodiment 1

[0040] In this embodiment, the base material is an aluminum alloy tube 2024 of φ208×4mm and an aluminum alloy tube 2024 of φ226×4mm, and the following steps are performed:

[0041] (1) According to the size of the two aluminum alloy pipes, an aluminum alloy pipe joint whose diameter at both ends matches the diameter of the two aluminum alloy pipes is processed, and three equally spaced grooves are opened on both sides of the pipe joint along the circumferential direction. Through holes, the center line of the grooved through hole is perpendicular to the axis of the pipe joint, and the distance between two adjacent grooved through holes is not less than the hole length of each grooved through hole; A 60° bevel is processed on the inner surface of both ends of the

[0042](2) First use acetone to remove the oil stains on the surface of the pipe joint and the end of the aluminum alloy pipe, the wall of the grooved through hole, the joint surface of the grooved through hole and th...

Embodiment 2

[0062] In this embodiment, the base material is an aluminum alloy tube 2024 of φ208×4mm and an aluminum alloy tube 2024 of φ226×4mm, and the following steps are performed:

[0063] (1) According to the size of the two aluminum alloy pipes, an aluminum alloy pipe joint whose diameter at both ends matches the diameter of the two aluminum alloy pipes is processed, and four equally spaced grooves are opened on both sides of the pipe joint along the circumferential direction. Through holes, the center line of the grooved through hole is perpendicular to the axis of the pipe joint, and the distance between two adjacent grooved through holes is not less than the hole length of each grooved through hole; A 50° bevel is processed on the inner surface of both ends of the

[0064] (2) First use acetone to remove the oil stains on the surface of the pipe joint and the end of the aluminum alloy pipe, the wall of the grooved through hole, the joint surface of the grooved through hole and th...

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Abstract

The invention relates to a welding connection method for aluminum alloy pipes with different diameters. According to the diameter of the aluminum alloy pipes, an aluminum alloy pipe joint with a diameter slightly larger than the diameter of the pipe is processed, and several grooves are respectively opened along the circumferential direction on both sides of the pipe joint. hole, the center line of the grooved through hole is perpendicular to the axis of the pipe joint, and the distance between two adjacent grooved through holes is not less than the hole length of each grooved through hole; A 50-60° bevel is processed on the inner surface of both ends; then the above-mentioned ends and grooved through holes are welded respectively, and then the pipe joint is subjected to local heat treatment, and finally an anti-corrosion coating is prepared and applied to the pipe joint. The invention can be used to connect aluminum alloy pipes of different diameters in any size, and has simple operation and implementation, and is easy to be popularized in industry.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a welding connection method for aluminum alloy pipes with different diameters. Background technique [0002] As people put forward higher requirements for energy saving, environmental protection, and safety, the application of lightweight and high-strength materials such as aluminum alloys has attracted widespread attention. Aluminum is a renewable resource. The earth's crust is rich in aluminum elements. Waste aluminum and aluminum materials can be recycled and remelted, which saves energy and reduces pollution. Aluminum seems to be an "inexhaustible" material, at least for a long time. At the same time, aluminum and aluminum materials are energy-saving and energy-storage materials. Under the condition of safety and environmental protection, the energy-saving and energy-storage functions of aluminum are far greater than those of steel and many other materials. Therefore, alumi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/02
Inventor 俞子朗
Owner 东和管道科技(江苏)有限公司
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