Integrated array electron gun and electron beam selective melting rapid formation system

Abstract

The invention relates to the technical field of additive manufacturing and processing equipment and especially relates to an integrated array electron gun and an electron beam selective melting rapid formation system. A plurality of electron beam emission units are arranged orderly in an array manner, and each electron beam emission unit is responsible for one region; the electron beam emission units in different array positions are controlled to carry out accurate scanning and forming on different positions of a powder bed, and thus electron beam quality of each electron beam emission unit is ensured; and through effective connection of the regions, under the condition of ensuring part forming precision and quality, the problem that an existing powder bed electron beam selective melting rapid formation device cannot produce large parts due to overlarge electron beam deflection angle is solved, and powder bed electron beam selective melting rapid manufacturing of the large-size parts is realized.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing processing equipment, in particular to an integrated array electron gun and electron beam selective melting rapid prototyping system. Background technique [0002] Additive manufacturing technology is also known as 3D printing or rapid prototyping technology. It is a technology based on digital model 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, or some aircraft parts). [0003] Metal parts rapid prototyping manufacturing methods mainly include laser selective sintering (SLS), laser selective melting (SLM), laser coaxial powder feeding ...

AI Technical Summary

Problems solved by technology

As the deflection angle of the electron beam increases, the quality of the electron beam drops significantly, and electromagnetic calibration can no longer ensure that the beam quality meets the needs of forming

In addition, the beam spot at the edge of the powder bed forming area has a certain deformation when the deflection angle of the electron beam increases, which leads to deviations in the shape of the molten pool and energy distribution, resulting in poor precision and poor forming quality of the formed parts

Using mechanical movement to move the electron gun or powder cylinder will greatly reduce the molding efficiency due to the slow speed of mechanical movement. At the same time, moving the electron gun or powder cylinder will make the electrical and mechanical structure of the equipment complex, which will easily cause the operation reliability of the equipment to decrease

Simply increase the number of electron guns, and due to the problem of layout space, it is impossible to effectively connect the responsible areas of each electron gun

[0009] In short, under the premise of ensuring the manufacturing accuracy and quality of parts, large-sized parts cannot be produced simply by relying on electron beam electromagnetic deflection scanning; simply increasing the number of electron guns cannot produce larger-sized parts

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