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Friction stir welding auxiliary device

An auxiliary device and friction stir technology, which is applied in the direction of welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of long process of clamping and welding equipment preparation, easy oxidation of the surface, high stability requirements, etc.

Inactive Publication Date: 2021-04-09
CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the friction stir welding has extremely high requirements on the stability of workpiece fixation, the whole process of clamping and welding equipment preparation is relatively long
For workpieces made of active high-melting-point materials such as aluminum alloys, their surfaces are easily oxidized. During the preparation process after mechanical grinding, a small amount of oxide films may have appeared on their surfaces, which will reduce the The quality of welded joints formed by subsequent friction stir welding, which are difficult to meet in demanding fields such as aerospace vehicles

Method used

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Embodiment Construction

[0026] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

[0027] In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting t...

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Abstract

The invention discloses a friction stir welding auxiliary device, comprising a protective cover provided with an air guide cavity with a downward opening and used for being connected with a main shaft of a welding head and covering a shaft shoulder of the welding head and a stirring head in the air guide cavity. A connecting hole and an air inlet hole which communicate with the air guide cavity are formed in the protective cover; the connecting hole is located in the top of the protective cover and used for penetrating through the main shaft; the air inlet hole communicates with an inert gas source; and a polisher is connected to the front side face of the protective cover and used for polishing the surface of a workpiece at the front end of the protective cover. The friction stir welding auxiliary device integrates an inert gas protection function and a polishing function, can well prevent oxides from causing adverse effects on welding before welding and during welding, and improves the welding efficiency and the quality of weld joints.

Description

technical field [0001] The invention relates to the technical field of friction stir welding, in particular to a friction stir welding auxiliary device. Background technique [0002] Friction stir is a unique welding technology. The welding head includes a main shaft, a shaft shoulder and a rotating stirring head. The outer diameter of the stirring head is smaller than the shaft shoulder. Fit on the surface of the workpiece; through the high-speed rotation of the stirring head and the friction with the workpiece, the temperature of the rubbed part of the workpiece will increase and soften, and at the same time, the softened part will be stirred to complete the connection of the joint of the workpiece; the shaft shoulder will rub against the surface of the workpiece Heat generation can prevent overflow of plastic state material and remove surface oxide film. Friction stir has the advantages of low residual stress, not easy to deform the welding workpiece, convenient mechaniz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/14B23K20/26
CPCB23K20/122B23K20/14B23K20/26
Inventor 林志成赵运强谭锦红董春林刘莉苗澍刘喆王春桂
Owner CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI