Synchronous uninterrupted wire feeding all-solid-phase friction stir additive manufacturing method and synchronous uninterrupted wire feeding all-solid-phase friction stir additive manufacturing device

Abstract

The invention discloses a synchronous uninterrupted wire feeding all-solid-phase friction stir additive manufacturing method and device, and belongs to the field of solid-phase additive manufacturing. According to the scheme, a filamentous additive raw material is synchronously and uninterruptedly fed into a space between a material storage cavity in a wire feeding device and a material crushing blade on a friction stir device through a plurality of wire feeding channels; then the granular additive raw materials crushed by material crushing blades on the stirring friction device move downwards to be accumulated along a screw rod part, the granular additive raw materials are continuously thermally plasticized along with continuous rotation of the stirring friction device, and the additive raw materials in the thermal plasticization state are stirred and mixed through a plurality of boss structures below the stirring friction device; and finally, the additive raw materials with the texture and the uniform state are subjected to additive forming through the gap between the wire feeding device and the base plate, the defect of interlayer interface bonding of all-solid-phase additive manufacturing is greatly overcome, the strength of interlayer bonding force is enhanced, and the solid-phase additive manufacturing efficiency of the large structural part is remarkably improved.

Description

technical field [0001] The invention relates to the field of solid-phase additive manufacturing, and more particularly, to a method and device for synchronous uninterrupted wire feeding full-solid-phase friction stir additive manufacturing. Background technique [0002] Additive manufacturing technology is a high-end manufacturing method that realizes the combination of precise "shape control" and high-performance "controllability" of complex structures. The material-structure integration of complex components can be realized near net shape. [0003] As a new additive manufacturing technology, friction stir additive manufacturing technology is derived from friction stir welding. At present, friction stir additive manufacturing is divided into three typical modes according to the characteristics of the manufacturing process, namely: plate superposition, friction surfacing welding Deposition and friction deposition of hollow bars. The friction stir additive manufacturing tec...

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Problems solved by technology

The Friction Stir Additive Manufacturing technology is carried out in the way of superimposed plates, and the plates are stacked upwards by overlapping. Only the defect-free area of ​​the formed part can be effectively used. This technology has a low material utilization rate in the process of Friction Stir Additive Manufacturing. , interface bonding defects are serious, and forming controllability is poor; friction surfacing uses friction heat as the driving force for the transition of consumables to deposit on the surface of the substrate and form a metallurgical bond with the surfacing layer process, which has great advantages and development potential , but there is still a lack of substantive progress in the research on external forming control and continuous feeding of large components; in the prior art, based on the surfacing deposition mode, the square bar is fed into the hollow mold and frictionally deformed with the substrate. The technology of friction stir additive manufacturing has been successfully realized, but multiple refueling and clamping restarts are required during the additive manufacturing process, resulting in multiple unstable processes in the additive manufacturing process, and the preparation of large structural parts takes a long time , the bonding force between additive layers is weakened, and the efficiency of additive manufacturing is low

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