Electron beam metal 3D printing device and printing method

Abstract

The invention relates to an electron beam metal 3D printing device and a printing method, and belongs to the field of precision additive manufacturing. An electron gun is located over a forming chamber, the forming chamber is located below a working table, a square opening of the forming chamber is connected with a working table square opening, a lifting platform capable of moving up and down is located in the forming chamber, a feeding module and a tensioning module are fixedly connected with the upper surface of the working table and symmetrically distributed on the two sides of the workingtable square opening, and preheating modules are fixedly connected with the upper surface of the working table and distributed around the working table square opening. The electron beam metal 3D printing device and the printing method have the advantages of achieving the technical purposes of high-quality powder preparation, uniform powder spreading, feeding and recycling, processing environment cleaning and the like, improving the surface quality of formed parts, greatly improving the electron beam processing efficiency, reducing the processing cost and lowering the system control difficulty.

Description

Technical field [0001] The invention belongs to the field of precision additive manufacturing, and particularly relates to an electron beam metal 3D printing device and method for manufacturing high-precision medical implants and high-performance industrial parts. Background technique [0002] Metal 3D printing is a high-end manufacturing technology that realizes parts processing through layer-by-layer material accumulation. It is widely used in aerospace, automotive, mold, medical and other fields, especially in medical implants and industrial high-performance parts. Land demand. At present, metal 3D printing technology is divided into laser 3D printing and electron beam 3D printing according to different heat sources. Compared with laser 3D printing technology, electron beam 3D printing technology has the advantages of higher output power and scanning speed, better preheating effect, better mechanical properties and surface quality of formed parts, so it has a larger applicati...

AI Technical Summary

Problems solved by technology

However, the existing domestic metal powder particle preparation technology is difficult to prepare high-quality metal powder particles that meet the requirements of electron beam processing, the yield of fine powder is not high, and the cost is relatively high; Some progress has been made in powdering effect, but there are still problems such as thick powder layer, uneven powder spreading, low powder layer density, and low powder spreading efficiency; in the powder spreading process, the powder spreading device, powder spreading The design of the device’s walking mechanism, driving part, and residual material recovery mechanism is relatively complicated, and it takes up a lot of space above the working platform, which reduces the sintering energy of the electron beam to a certain extent; at the same time, because the electron beam processing requires a vacuum and clean processing environment , and it is difficult to avoid the impact of powder particles being blown away and scattered on the processing environment in the process of feeding, powder spreading, processing, and residual material recovery, which greatly reduces the processing effect and safety of electron beam 3D printing

To sum up, for electron beam metal 3D printing, the system and method of additive manufacturing by melting metal powder particles in the past will cause a series of technical problems

Images