Selective laser melting single-knife two-way powder laying device and selective laser melting equipment

Abstract

The invention discloses a selective laser melting single-knife two-way powder laying device. A scraping knife holder body is of a hollow structure with an upper opening and a lower opening. A powder feeding unit and a scraping knife mounting frame are both located in an inner cavity of the scraping knife holder body. The powder feeding unit comprises a powder feeding plate which can move relative to the scraping knife holder body in the powder laying direction. A powder storage tank is formed among the powder feeding plate, the scraping knife holder body and the scraping knife mounting frame. A powder falling channel is formed between the scraping knife holder body and the scraping knife mounting frame. The powder laying device moves towards one side to the space between the powder feeding unit and the whole scraping knife holder body, relative displacement occurs, the powder storage tank is opened, and powder falls to one side of a scraping knife along the powder falling channel; the whole scraping knife holder body moves reversely, and the powder storage tank is closed; and finally the whole scraping knife holder body and the powder feeding unit both move to the other side, and then powder laying is started. The invention further discloses SLM equipment comprising the powder laying device. The selective laser melting single-knife two-way powder laying device achieves the functions of two-way powder laying and automatic powder falling through one scraping knife, cost is reduced, and no powder pollution is ensured.

Description

technical field [0001] The invention belongs to the technical field of laser forming, and in particular relates to a single-knife bidirectional powder spreading device for laser selective melting, and also relates to laser selective melting equipment with the powder spreading device. Background technique [0002] Laser selective melting (SLM) is a method of direct forming of metal parts, and it is the latest development of rapid prototyping technology. This technology is based on the most basic idea of ​​rapid prototyping, that is, the "incremental" manufacturing method of layer-by-layer cladding, and directly forms parts with specific geometric shapes according to the three-dimensional CAD model. During the forming process, the metal powder is completely melted to produce metallurgical bonding. Metal parts with complex shapes and structures that cannot be manufactured by traditional machining methods are one of the main directions for the application of laser rapid prototyp...

AI Technical Summary

Problems solved by technology

[0006] One object of the present invention is to provide a single-knife two-way powder spreading device for laser selective melting, which solves the problems of complex structure, more auxiliary equipment and powder contamination in the existing powder spreading device

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