Stir head for friction stir machining and fabrication of metal matrix composite

A composite material and friction stir technology, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems of uneven distribution of reinforcement, large flash and extrusion of reinforcement, and reduce the amount of flash, distribution The effect of homogenizing and increasing the fluidity of plastic metals
CN103286435AInactive Publication Date: 2013-09-11SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV
Publication Date
2013-09-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a stir head for friction stir machining and fabrication of metal matrix composite. The stir head for friction stir machining and fabrication of the metal matrix composite is of an integrated structure which is composed of a stir pin, a shaft shoulder and a clamping body. One end of the shaft shoulder is connected with the clamping body, the center of the other end of the shaft shoulder is connected with the stir pin, the end face of the end, at which the stir pin is fixedly arranged, of the shaft shoulder is of a concave shape, a lug boss is arranged on the end face, and a spiral or circular arc groove is formed in the periphery of the stir pin on the lug boss. The shaft shoulder is provided with a lug boss structure, the quantity of fins is reduced and the quantity of extrusion outputs is increased notably by means of the outer shaft shoulder and the concave bottom surface, the mobility of plastic metal can be improved by means of a groove of an inner shaft shoulder bottom surface and the side plane of the stir pin, and thus particles are distributed in a matrix evenly.
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Description

technical field

[0001] The invention relates to a stirring head, in particular to a stirring head suitable for preparing metal matrix composite materials through friction stir processing, and belongs to the technical field of metal matrix composite material preparation. Background technique

[0002] Friction stir welding technology is a solid phase welding process invented by the British Welding Institute in 1991 (Patent No. US5460317, 1991.12). Friction stir processing technology is a new type of solid phase processing technology developed based on friction stir welding technology. The principle of preparing metal matrix composite materials by this technology is: use a high-speed rotating stirring head to press into the metal plate, and move along the processing direction at a certain speed. The stirring head stirs the metal matrix to generate friction heat, plastic deformation heat and severe plastic deformation, resulting in metal plasticity. Flow, the reinforcing body p...

Claims

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