Device based on electron beam hot wire fuse additive manufacturing

Abstract

The invention discloses a device based on electron beam hot wire fuse additive manufacturing. The device includes: an electron gun, which includes a filament for generating electron beams, a cathode under the filament, a grid under the cathode, an anode under the grid, The focusing coil below the anode and the deflection coil below the focusing coil, the electron gun is placed in the vacuum chamber of the electron gun; the vacuum chamber of the electron gun is placed on the top of the vacuum forming chamber, and is connected and isolated from the vacuum forming chamber through an electronic gas valve; The resistance heating system includes a large-thickness substrate placed on a working platform in a vacuum chamber, a resistance wire that can realize temperature rise, a heating control device for the resistance wire, and a thermocouple for temperature measurement. The device of the invention achieves good surface shaping of the part and uniformity of the microstructure. The device of the invention can change the internal stress distribution of the material and reduce the deformation of the substrate.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a manufacturing device based on electron beam hot wire and fuse additive. Background technique [0002] Metal additive manufacturing technology is based on a three-dimensional digital model, using computer-aided technology to realize flat layer slicing and path planning, and using corresponding numerical control technology to realize the technology of metal powder or wire accumulation to obtain complete physical parts. This technology covers many technical fields and has a wide range of applications. It is known as an important symbol of digital manufacturing in the third industrial revolution. Now more mature technology additive manufacturing technology includes laser selective melting technology (SLM), electron beam selective melting technology (EBSM), electron beam fuse deposition technology (EBFF) and laser stereoforming technology (LSF), arc fuse a...

AI Technical Summary

Problems solved by technology

This not only causes the inhomogeneity of the structure and cannot obtain the desired structure shape, but also seriously reduces the mechanical properties of the parts, reduces the service time of the parts, and increases the failure probability of the parts

On the other hand, the additive manufacturing process is a repeated welding process. The uneven temperature distribution of the parts will lead to a large welding stress in the material, and cracks are easily initiated at these positions, thereby reducing the overall performance of the parts.

Images