An atmosphere protection device applied to additive manufacturing

Abstract

The present invention proposes an atmosphere protection device applied to additive manufacturing, which can provide inert atmosphere protection for the current printing work area, and overcomes the need to fill inert gas protection in a larger space for atmosphere protection in the existing additive manufacturing process question. The atmosphere protection device includes a partial powder bed protective cover erected on the top surface of the powder tank, the lower end surface of the partial powder bed protective cover is empty and serves as a contact surface with the top surface of the powder tank, and the inner walls of the front and rear sides of the partial powder bed protective cover Coanda chambers are respectively provided, and the gas guide slits of the Coanda chamber are located on the lower end surface of the partial powder bed shield; the distance between the Coanda chamber and the outer edge of the powder cylinder is kept to leave a smoke airflow channel; the local powder bed shield The upper part of the front and rear sides is provided with an air inlet pipe and an air outlet pipe, which run through the Konda cavity and communicate with the powder spreading area. The air inlet pipe is used to feed inert gas and forms a circulation pipeline with the air outlet pipe.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing and relates to an atmosphere protection device applied to additive manufacturing. Background technique [0002] Additive manufacturing (AM), also known as "3D printing", is based on digital CAD model data and adopts the manufacturing principle of superposition method similar to mathematical integration to reduce the manufacturing of three-dimensional solids to two-dimensional cross-sections. The point-by-layer manufacturing method realizes the dimension reduction forming of three-dimensional parts, which is not limited by the complexity of the shape, and can realize fast, high-quality, efficient, economical, fully intelligent and fully flexible manufacturing of parts with arbitrary complex shapes. Additive manufacturing is an important part of the advanced manufacturing industry. It is a high-end digital manufacturing technology that has developed rapidly in the past 30 years. (ΔM&...

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Problems solved by technology

[0005] The purpose of this invention is to overcome the problem that the atmosphere protection needs to be filled with inert gas protection in a large space in the existing additive manufacturing process, and propose an atmosphere protection device applied to additive manufacturing, which can be used for the current printing area. Inert atmosphere protection

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