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Thin plate and friction stir welding method for ultra-thin plate

A friction stir welding and friction stir technology, applied in welding equipment, non-electric welding equipment, metal processing, etc., to achieve the effect of simple operation, high joint strength, and solving the problem of friction stir welding

Inactive Publication Date: 2017-09-08
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the welding problem of thin plates and ultra-thin plates, the present invention provides a friction stir welding method suitable for thin plates and ultra-thin plates

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Embodiment Construction

[0022] The embodiments of the present invention are described in detail below: the present embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0023] Such as figure 1 As shown, a friction stir welding method suitable for thin plates and ultra-thin plates provided in this embodiment includes the following steps:

[0024] The first step is to clean the upper surface, butt joint surface of the plate to be welded 3 and the oxide film and oil stain on the upper and lower surfaces of the cover plate 2, assemble the plate to be welded in Type I, and clamp and fix it on the welding backing plate.

[0025] In the second step, the center of the cover plate 2 is aligned with the butt joint of the plate to be welded 3, and the cover plate is pressed and fixed on the ...

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Abstract

The invention provides a thin plate and a friction stir welding method for the ultra-thin plate. The method comprises the processes that firstly, the upper surface and the butt joint surface of a welded plate and oxidation layers of the upper surface and the lower surface of a cover plate are cleaned up, and the welded plate is assembled in a butt-joint manner; secondly, the welded plate is covered with the cover plate made of a material the same as that of the welded plate, the accumulated value of the thickness (t1) of the cover plate and the thickness (t2) of the welded plate ranges from 2 mm to 5 mm, the width of the cover plate is larger than that of a shaft shoulder of a stirring head, and the length of the cover plate is equal to that of the welded plate; and thirdly, the stirring head for welding is selected, it is required that a pin of the stirring head is equal to (t1+t2)-(0.1-0.2), and appropriate welding parameters are selected for welding; and fourthly, the cover plate is removed through the machining manner till a welding seam is in flush with the welded base material. Compared with traditional friction stir welding, the friction stir welding of the ultra-thin plate can be achieved, the problem that the welding seam is thinned in the friction stir welding is avoided completely, the appearance of the welding seam is level, the post-welding deformation is small, and the joint connecting quality is reliable.

Description

technical field [0001] The invention belongs to the field of welding and relates to a welding method suitable for thin plates or ultra-thin plates. Background technique [0002] Friction stir welding is a new type of solid-phase joining technology. Its principle is that the material to be welded is formed by the plastic flow of the high-speed rotating friction heat of the stirring head and the axial extrusion, and the butt surface is broken. solid phase connection. Compared with the traditional fusion welding method, friction stir welding has the characteristics of heat input, small welding deformation and excellent mechanical properties. It is especially suitable for welding low melting point materials, such as aluminum and magnesium alloys. [0003] With the development of science and technology, the aerospace, automobile and shipbuilding industries have higher and higher requirements for energy saving, emission reduction and light weight. It has become a development tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12
CPCB23K20/122B23K2101/18
Inventor 王志国尹玉环窦超徐奎封小松
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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