A stirring head made of graphene-aluminum composite material based on hydraulic technology
A technology of aluminum composite material and hydraulic technology, which is applied in the field of graphene/Al composite material friction stir stirring head, can solve the problems of high preparation cost and single friction stir, and achieve the goal of improving service life, ensuring processing quality and improving processing efficiency Effect
Active Publication Date: 2022-06-24
BEIJING UNIV OF TECH
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Problems solved by technology
The current stirring head only has a single function of stirring and friction, and it needs to be used in conjunction with other equipment when manufacturing composite materials, and the cost of material preparation is relatively high
Method used
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Embodiment 1
[0029] like Figure 1-Figure 3 As shown, this embodiment provides a stirring head, including a stirring needle 7, a shaft shoulder 6, a clamping handle 2 and a hydraulic system, the clamping handle is a cylindrical structure, and the stirring needle 7 is a conical structure, The clamping handle and the stirring needle are coaxially connected, and the diameters of the two are different to produce a shoulder 6. The hydraulic system includes a hydraulic part and a material part. The upper end of the hydraulic hole 4 is sealed with the screw 1. The material hole 5 is sealed by the sealing ball 3, the upper end of the material hole 5 is closed by the screw 1, and the lower end is temporarily sealed with solder during operation. When processing different types of composite materials, the type of hydraulic oil can be adjusted by the concentration of the reinforcing phase to be added, so as to control the speed of adding powder.
[0030] The core of the automatic material adding stir...
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Abstract
The invention discloses a graphene-aluminum composite material preparation stirring head based on novel hydraulic technology, which belongs to the technical field of material preparation. It is mainly composed of a cylindrical clamping handle, a shaft shoulder, a stirring needle and a hydraulic system. Among them, three cylindrical grooves are designed inside the mixing head and run through the cylinder along the axis direction, and are connected through openings, and the top is sealed with bolts; the middle hydraulic hole is filled with high-expansion kerosene, the bottom and top are sealed, and the material holes on both sides are sealed. Fill the mixed powder of graphene sheet and aluminum powder with good fluidity, and seal the bottom with solder. When the temperature rises during processing, the solder will automatically fall off, and the originally closed space will be opened; during the heating process of friction stirring, kerosene will heat up and expand, and the volume will increase. The mixed powder is extruded into the weld to achieve the purpose of adding the reinforcement phase. The invention utilizes friction stirring technology combined with a novel hydraulic stirring head to effectively improve production efficiency and reduce production cost.
Description
technical field [0001] The invention relates to the field of material processing, in particular to a graphene / Al composite material friction stir stirring head based on hydraulic design. Background technique [0002] Metal matrix composites are widely used in aerospace, automobile industry and other fields due to their excellent properties such as high strength-to-weight ratio and low thermal expansion coefficient. In recent years, the graphene-reinforced metal matrix composites have achieved fruitful results, which have greatly improved the hardness, strength, and wear resistance of the composites. However, graphene's low density, difficulty in uniform dispersion, easy agglomeration, easy oxidation, and interfacial reaction during the preparation process restrict the development of this composite material. [0003] Friction stir processing technology (FSP for short) is a technology developed based on the basic concept of FSW for microstructure modification and manufacturin...
Claims
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IPC IPC(8): B23K20/12
CPCB23K20/1245
Inventor 吴奇蔡鹏飞刘林傲高继溟龙连春
Owner BEIJING UNIV OF TECH