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Welding connection method of aluminum-alloy pipelines of same diameter

A technology of welded connection and aluminum alloy tubes, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of reduced mechanical properties, large expansion coefficient, and harmful performance, so as to increase the effective bearing area and improve the welding strength , Operation and implementation of simple effects

Active Publication Date: 2015-07-08
南通百业工具有限公司
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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 of aluminum-alloy pipelines of same diameter
  • Welding connection method of aluminum-alloy pipelines of same diameter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this embodiment, the base metal is two φ208×4mm aluminum alloy pipes 2024, and a φ212×5mm aluminum alloy pipe joint 2024, through the following steps:

[0040] (1) On both sides of the pipe joint, 3 equidistant groove-shaped through holes are respectively opened along the circumferential direction. The center line of the groove-shaped through-hole is perpendicular to the axis of the pipe joint. The spacing is not less than the hole length of each groove-shaped through hole; and then a 60° bevel is processed on the inner surface of both ends of the pipe joint;

[0041] (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 the lower plate, etc., and then use sandpaper to mechanically polish the above to be welded area, polished until the metallic luster is revealed, and finally wiped clean with a clean cotton gauze; ...

Embodiment 2

[0061] In this embodiment, the base metal is two φ208×4mm aluminum alloy pipes 2024, and a φ212×5mm aluminum alloy pipe joint 2024, through the following steps:

[0062] (1) On both sides of the pipe joint, 4 equidistant groove-shaped through holes are respectively opened along the circumference. The center line of the groove-shaped through-hole is perpendicular to the axis of the pipe joint. The spacing is not less than the hole length of each groove-shaped through hole; and then a 50° bevel is processed on the inner surface of both ends of the pipe joint;

[0063] (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 the lower plate, etc., and then use sandpaper to mechanically polish the above to be welded area, polished until the metallic luster is revealed, and finally wiped clean with a clean cotton gauze;

[0064] (3)...

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Abstract

The invention relates to a welding connection method for aluminum alloy pipes with the same diameter. According to the diameter of the aluminum alloy pipe, a section of aluminum alloy pipe with a diameter slightly larger than the diameter of the pipe to be connected is selected or processed as a pipe joint. A number of groove-shaped through holes are respectively opened along the circumferential direction on both sides. The center line of the groove-shaped through-hole is perpendicular to the axis of the pipe joint, and the distance between two adjacent groove-shaped through-holes is not less than the hole of each groove-shaped through-hole length; then process a 50-60° bevel on the inner surface of the two ends of the pipe joint; then weld the above-mentioned ends and grooved through holes respectively, and then perform local heat treatment on the pipe joint, and finally prepare an anti-corrosion coating at the pipe joint. The invention 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 the same diameter. 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, aluminu...

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 南通百业工具有限公司
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