Powder bed electron beam additive manufacturing equipment and manufacturing method

Abstract

The invention discloses powder bed electron beam additive manufacturing equipment and manufacturing method. The equipment comprises a forming chamber which is internally provided with a thermal insulation frame, a powder laying platform, a scraper and a forming cylinder, a first upper powder box and a second upper powder box which are arranged on the two sides of the thermal insulation frame respectively, a first lower powder box and a second lower powder box which are arranged on the two sides of the forming cylinder respectively, and two powder pushing devices which are arranged on the two sides of the powder laying platform respectively, wherein each powder pushing device comprises a supporting plate, a powder pushing groove and a linkage assembly. According to the equipment and the method, on the premise that the sizes of the forming chamber and the internal structure are not changed, the internal space of the forming chamber is effectively utilized, the quantity of powder capableof being contained in the powder boxes is greatly increased, and therefore the problem that printing is stopped due to the fact that metal powder is insufficient when large-size parts are printed canbe effectively solved, and enough powder ensures that the equipment can print small-size parts and also can form large-size printed parts.

Description

technical field [0001] The invention relates to the technical field of 3D printing equipment, in particular to a powder bed electron beam additive manufacturing equipment and a manufacturing method. Background technique [0002] Powder bed electron beam 3D printing technology is a kind of additive manufacturing technology. Based on the digital model, this technology builds up and melts materials (metal powder) layer by layer to produce physical products. [0003] In the prior art, in the powder bed electron beam additive manufacturing equipment used in the 3D printing forming process, the powder feeding mechanism is usually divided into two types: an upper powder feeding mechanism and a lower powder feeding mechanism. The upper powder feeding mechanism is to install the powder boxes above the powder spreading platform and on both sides of the heat insulation frame, while the lower powder feeding mechanism is to install the powder boxes under the powder spreading platform and...

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Problems solved by technology

[0006] The embodiment of the present invention provides a powder bed electron beam additive manufacturing equipment and manufacturing method to solve the problem of insufficient metal powder in the powder box in the powder bed electron beam additive manufacturing equipment in the prior art and often occurs when printing large-sized parts The problem of printing termination due to insufficient metal powder

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