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A soldering set for agitating friction welding

A technology of friction stir welding and welding tools, which is applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems of uneven material thickness, heat transfer of double-layer plates and lower plates that cannot be welded, and special shapes, etc., to achieve high Mass connection, improving the effect of heat deficiency

Inactive Publication Date: 2009-07-29
JIANGSU UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: when performing stir welding for aluminum alloy profiles with special shapes, the existing welding tools for friction stir welding are difficult to solve the problem that the lower plate cannot be welded due to the heat transfer problem of the double-layer plate, and the material The technical difficulties caused by problems such as uneven thickness and special shape make it difficult for friction stir welding to achieve the desired effect

Method used

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  • A soldering set for agitating friction welding
  • A soldering set for agitating friction welding

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Embodiment Construction

[0015] The schematic diagram of the special shape L-shaped aluminum alloy profile of the embodiment of the present invention is as follows figure 1 As shown in sequence 1, it is used to make large-size LCD TV frames. There is a small boss 5 on the inside of the long and short sides of the profile. After welding the L-shaped aluminum alloy profile frame of a large-size LCD TV, it is required to ensure the shape and size of the boss, and the welding deformation requirements of the aluminum alloy profile after fusion welding Also very small.

[0016] like figure 1 As shown, in this embodiment, the L-shaped aluminum alloy profile 1 is reversed, that is, the friction surface of the stirring head contacts the inner surface of the L-shaped aluminum alloy profile 1, and the inner and outer sides of the L-shaped aluminum alloy profile 1 to be welded are inlaid respectively. Put together auxiliary blocks 3,4.

[0017] figure 2 The shown structure of the stirring head 2 of the prese...

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Abstract

The invention relates to a welding tool for friction stir welding of double-layer aluminum alloy materials. The welding tool includes a rear cylindrical connecting body, a middle cylinder, and a stirring needle at the front; the middle cylinder has a heat dissipation spiral groove; the front of the welding tool The stirring needle at the top is conical, and the conical surface is made with spiral grooves; the shoulder connected between the end of the middle cylinder and the bottom of the stirring needle is a concave conical surface, and at least three spiral grooves are evenly distributed on the conical surface of the stirring needle , the tip of the stirring needle is made with a hemispherical groove. The helical groove on the stirring needle intersects with the hemispherical groove, forming at least three notches on the edge of the hemispherical groove at the top of the conical stirring needle. The friction stir welding tool of this structure strengthens the plastic flow of the aluminum alloy during friction stir welding, and solves the problem of insufficient heat and uneven heat of the lower layer caused by poor heat transfer of the double-layer plate.

Description

technical field [0001] The invention relates to a welding tool, in particular to a welding tool used for friction stir welding of double-layer aluminum alloy plates, and belongs to the technical field of material connection. Background technique [0002] Friction stir welding (FSW) is a new low-temperature solid-phase joining technology, which is suitable for welding low-melting point alloys. It was invented by The Welding Institute (TWI) in 1991 (US5460317). The principle of this technology is to use a high-speed rotating stirring head to insert into the seam, and use the strong friction and stirring effect of the stirring head to make the welding joint The seam area is in a thermoplastic state and is crushed, mixed, and connected together under a certain pressure. The stirring head rotates and squeezes at a high speed in the direction of welding, and a weld seam is formed behind the stirring head, thus completing the solid state connection. . At present, all countries ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
Inventor 严铿赵勇聂洁刘海波付娟
Owner JIANGSU UNIV OF SCI & TECH
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