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Method for eliminating incomplete penetration and weak root connection of friction stir welding joint

A friction stir, welding head technology, used in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve problems such as weak root connections, and achieve the effect of enhancing stability, simple assembly process, and simple welding process

Active Publication Date: 2010-06-16
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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Problems solved by technology

[0006] In order to solve the defects of incomplete penetration and weak connection at the root that often exist in the traditional friction stir welding process, the purpose of the present invention is to provide a method for eliminating the incomplete penetration of the friction stir welded joint and the weak connection at the root. By using the method of the present invention, Effectively solve the incomplete penetration of joints and weak connection defects at the root to ensure the quality of welding

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  • Method for eliminating incomplete penetration and weak root connection of friction stir welding joint

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Embodiment Construction

[0017] Preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0018] Accompanying drawing is the operation schematic diagram of the elimination method of friction stir welding joint incomplete penetration and root weak connection of the present invention, as shown in the embodiment of accompanying drawing, in the middle of workpiece 2 to be welded and back rigid backing plate 4, a layer and workpiece are added. For the gasket 3 of the same material, the stirring tool 1 completely penetrates the welding thickness h of the workpiece, and partially penetrates into the thickness h' of the thin gasket. After welding, remove the gasket 3 and grind the back of the weld to ensure that the weld is flush with the substrate.

[0019] The specific embodiment of the method for eliminating the incomplete penetration of the friction stir welded joint and the weak connection at the root of the present invention includes the follo...

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Abstract

The invention relates to friction stir welding, and discloses a method for eliminating incomplete penetration and weak root connection of a friction stir welding joint. The method comprises the following steps of: 1. producing a gasket, wherein materials and the heat treatment state of the gasket are the same as those of a to-be-welded workpiece; 2. assembling the gasket, namely arranging the gasket between the to-be-welded workpiece and a back rigid bottom plate; 3. preparing before welding, wherein an included angle between a stirring tool and the center of a main shaft is between 0 to 3 DEG; 4. formally welding; and 5. removing the gasket after finishing the welding, and polishing the back surface of a welding seam to ensure that the back surface of the welding seam is flush with a base body. The method for eliminating the incomplete penetration and the weak root connection of the friction stir welding joint can eliminate the defects of the incomplete penetration and the weak root connection which are often generated in stir welding, and has the advantages of improving welding quality, and enhancing stability of the welding process and the like. The method is suitable for butted joint type friction stir welding of all spacial shapes.

Description

technical field [0001] The invention relates to a method of friction stir welding, in particular to a method for eliminating incomplete penetration of a friction stir welding joint and weak connection at the root. Background technique [0002] At present, friction stir welding technology has been successfully applied to various military products, from the delta series rocket fuel tanks in the United States, the external storage tanks of the space shuttle, the Ariane rocket engine racks in the European Union, and the H-2A rocket Tanks, to my country's CZ-5E rocket propellant storage tanks, have achieved excellent results. [0003] According to relevant documents, applications for friction stir welding technology patents have been applied in all aspects. Example 1: Patent No. ZL 200520005493.4, a flat two-dimensional welding seam friction stir welding spindle head, is aimed at friction stir welding equipment, providing a With the new spindle head structure, the inclination ang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/24
Inventor 姚君山康志明贾洪德刘杰徐萌
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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