Additive manufacturing equipment combining electron beam selective melting and electron beam cutting

Abstract

The invention discloses additive manufacturing equipment combining electron beam selective melting and electron beam cutting. The additive manufacturing equipment is characterized in that a same electron beam transmitting, clustering and scanning device can transmit electron beams in three modes, namely heating, selective melting and electron beam cutting. The electron beams in the heating mode are transmitted, so that scanning preheating is conducted on a powder bed; the electron beams in the selective melting mode are transmitted, so that scanning melting is conducted on powder in a section contour, and a part section layer in need is formed; and the electron beams in the electron beam cutting mode are transmitted, so that cutting scanning is conducted on the inner contour and the outer contour of a part section for once or multiple times, rough edges and fusion powder on the contours are removed or cut away, and the precise and smooth inner contour and the outer contour of the part section are obtained. The heating process, melting deposition process and contour cutting process are repeated, and a three-dimensional solid part in need is finally obtained. By means of the additive manufacturing equipment combining electron beam selective melting and electron beam cutting, the finish degree of the inner surface and the outer surface and tiny inner hole formation capacity of an electron beam selective melting product can be increased.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to a method of using electron beams to selectively melt and heat materials so that the materials are sintered or melted and deposited layer by layer, and at the same time, electron beams are used to cut the profile of the formed material to separate the formed material from the powder to achieve high performance and high efficiency. Additive manufacturing equipment for efficient and high-precision 3D parts. Background technique [0002] Electron beam selective melting (EBSM) is a typical additive manufacturing process, which has great advantages in three-dimensional forming of complex structures and special materials. The electron beam selective melting process uses a high-energy electron beam as a heat source to sinter or melt powder materials layer by layer, so that the materials are piled up layer by layer. [0003] However, similar to other additive manufacturing processes...

AI Technical Summary

Problems solved by technology

As for the problem of poor surface finish of parts in the electron beam selective melting process, usually in the follow-up process, the surface quality is improved by means of "subtraction", which not only reduces the overall efficiency of part manufacturing, but also has inner pores. Problems such as inability to perform surface processing

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