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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: 2013-12-25
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

[0041] In this embodiment, the base materials are the aluminum alloy tube 2024 of φ208×4mm and the aluminum alloy tube 2024 of φ226×4mm, and the following steps are performed:

[0042] (1) According to the size of the two aluminum alloy pipes, machined aluminum alloy pipe joints with diameters at both ends matching the diameters of the two aluminum alloy pipes. On both sides of the pipe joints, three equally spaced grooves are opened in the circumferential direction. Through hole, the slot center line of the slot-shaped through hole is perpendicular to the axis of the pipe joint, and the distance between two adjacent slot-shaped through holes is not less than the hole length of each groove-shaped through hole; The inner surface of the two ends of the machine has a groove of 60°;

[0043] (2) First use acetone to remove all oil stains on the pipe joints and aluminum alloy pipe end surfaces, groove-shaped through-hole hole walls, groove-shaped through-holes and the joint surface of t...

Embodiment 2

[0064] In this embodiment, the base materials are the aluminum alloy tube 2024 of φ208×4mm and the aluminum alloy tube 2024 of φ226×4mm, and the following steps are performed:

[0065] (1) According to the size of the two aluminum alloy pipes, machined aluminum alloy pipe joints with diameters at both ends matching the diameters of the two aluminum alloy pipes, and 4 equidistant grooves are respectively opened in the circumferential direction on both sides of the pipe joints Through hole, the slot center line of the slot-shaped through hole is perpendicular to the axis of the pipe joint, and the distance between two adjacent slot-shaped through holes is not less than the hole length of each groove-shaped through hole; The inner surface of the two ends of the machine has a groove of 50°;

[0066] (2) First use acetone to remove all oil stains on the pipe joints and aluminum alloy pipe end surfaces, groove-shaped through-hole hole walls, groove-shaped through-holes and the joint surf...

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Abstract

The invention discloses a welding connection method for aluminum alloy pipelines of different diameters. The method comprises the steps that an aluminum alloy pipeline connector with the diameter slightly larger than that of an alloy pipeline is machined according to the diameter of the alloy pipeline , a plurality of trough type through holes are formed in the two sides of the pipeline connector in the circumferential direction, the center line of each trough type through hole is perpendicular to the axis of the pipeline, the distance between every two adjacent trough type through hole is no smaller than the length of each trough type through hole, and 50-60-degree beveled edges are machined on the inner surface of the two ends of the pipeline connector, welding is conducted on the ends and the trough type through holes, then partial heat treatment is conducted on the pipeline connector, and anticorrosive paint is prepared to paint the pipeline connector at last. The welding connection method for the aluminum alloy pipelines of the different diameters can be used for connecting the aluminum alloy pipelines of the different diameters, and is easy to operate and implement, and easy to industrially popularize.

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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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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