Embedded metal material connecting method with sealing effect

A metal material and connection method technology, which is applied in the field of embedded metal material connection, can solve the problems of limited change in the length and size of the stirring needle, and is not suitable for parts connection, etc., and achieves the effect of beautiful appearance, airtightness, and improved bonding strength

Inactive Publication Date: 2013-03-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Friction stir plug welding is limited by the working method, and the length and size of the stirring needle are limited, so it is not suitable for the connection of parts

Method used

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  • Embedded metal material connecting method with sealing effect
  • Embedded metal material connecting method with sealing effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Use this method to connect two 6061 aluminum alloy plates with a thickness of 10 mm. Fasten with M10 screws of the same material first, and then carry out friction welding fastening without stirring pin under the conditions of rotation speed 2000 rpm, reduction amount 0.5 mm, reduction speed 10 mm / min, and pressure holding time 6 seconds . Under the action of strong plastic deformation and friction heat caused by the stirring tool, the screw is further tightened, and a welding layer with a certain depth is formed at the tail of the screw and the workpiece to be welded. After milling off the surface flash of the solder joint, there is no gap. There is no water leakage when pumping water pressure, indicating that the sealing welding has been realized.

Embodiment 2

[0020] Use this method to connect two AZ91D magnesium alloy cast plates with a thickness of 15 mm. First fasten with M12 screws made of aluminum, and then perform friction stir welding fastening at a speed of 3000 rpm, a reduction of 0.5 mm, a reduction speed of 10 mm / min, and a dwell time of 8. After milling off the surface flash of solder joints, no gaps exist, and sealed welding is realized.

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PUM

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Abstract

An embedded metal material connecting method with a sealing effect comprises the following steps of forming a threaded hole in a metal piece such as aluminum, magnesium, copper, zinc, titanium, steel or other metals to be connected; screwing a screw into the threaded hole and tightening the screw; rotating and holding down the screw in the tightening direction by using needleless friction stir welding (a welding tool is only provided with a shaft shoulder without a stirring needle), fastening the screw through heat generated by violent friction and plastic deformation; and forming a welding layer which is several millimeters deep between the tail part of the screw and the metal piece to be connected. According to the connecting method, bonding strength is high and the joint is hidden without affecting assembling and beauty; and the sealing property is good so that gas and liquid can be effectively prevented from leakage.

Description

technical field [0001] The invention belongs to the technical field of metal material connection, in particular to an embedded metal material connection method with a sealing effect. Background technique [0002] When some components are working, it is required to transmit loads between parts, and there must not be too many connection points exposed to the outside, which will affect the assembly. It is also necessary to consider the appearance of the components. In some cases, it is also required to have a good seal for gas and liquid. . Conventional screw / bolt connection, welding, and glue bonding methods are difficult to meet the above requirements at the same time. The equipment manufacturing industry is in great need of a joining process that can meet the above requirements at the same time. [0003] Friction stir welding (Friction Stir Welding, FSW) is a solid phase welding technology invented by the British Welding Institute in 1991. FSW works as figure 1 Shown: Du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12
Inventor 倪丁瑞马宗义
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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