An Additive Manufacturing Device Based on Electron Beam Fused Filament Forming

Abstract

The invention discloses an additive manufacturing device based on electron beam fuse forming, which includes a vacuum chamber, a carrying platform, an electron gun, a fine wire feeding mechanism, a thick wire feeding mechanism and a main control unit, wherein: the fine wire The wire feeding mechanism is used for conveying thin metal wire; the thick wire feeding mechanism is used for conveying thick metal wire; the main control unit is used for the contour and internal The path control of filling includes: let the electron beam melt the thin metal wire on the carrying platform to form the contour part; let the electron beam melt the thick metal wire on the carrying platform to form the filling part; drive the carrying platform to corresponding slices The number of layers is lowered layer by layer, so that multiple layers of slices are piled up to form a workpiece. The invention can improve the processing efficiency and appearance quality of the workpiece, so that after the workpiece is formed, it has a small processing allowance and accurate external dimensions.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing device based on electron beam fuse forming. Background technique [0002] Additive manufacturing technology is also known as 3D printing or rapid prototyping technology. It is a technology based on digital three-dimensional model drawing files, using materials such as metal powder, wire or bondable plastic, to construct objects by stacking and accumulating layer by layer. Rapid prototyping manufacturing technology is widely used in mold manufacturing, industrial design and other fields, and is gradually being used in the direct manufacturing of some products, especially some high-value applications, such as hip joints or teeth and some aircraft parts. [0003] Metal parts rapid prototyping manufacturing methods mainly include laser selective sintering (SLS), laser selective melting (SLM), laser coaxial powder feeding direct manufacturing,...

AI Technical Summary

Problems solved by technology

If a thinner welding wire is used, the size of the formed molten pool is small, and the surface quality of the deposited layer is good, but the forming efficiency is indeed very low.

If a thicker welding wire is used, the efficiency of melting and forming accumulation is very high, but the surface of the formed accumulation layer is rough and the appearance is poor. Usually, more machining allowance is required to ensure the effective size of the workpiece

In short, the use of ordinary fuse rapid prototyping equipment cannot take into account the two factors of forming surface quality and forming efficiency, and it is impossible to achieve near-net additive manufacturing of metal materials

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