Powder laying and recovering device for selective laser melting of heterogeneous material

Abstract

The invention relates to a powder laying and recovering device for selective laser melting of a heterogeneous material. The powder laying and recovering device comprises a powder laying device and a powder recovering device; a scrapper plate and a plurality of powder laying grooves are arranged on the powder laying device, wherein the scrapper plate can move in a reciprocating way along a horizontal fixed guide rail; the powder recovering device is provided with an absorbing cover; the absorbing cover can move above a molding cylinder to absorb and move away from an area above the molding cylinder to avoid interference on laser melting molding; a powder recovering pipeline is connected to the upper end of the absorbing cover; un-solidified powder can be absorbed and recovered into a specified recovery box through the control of an opening-closing baffle plate. According to the powder laying and recovering device for selective laser melting of the heterogeneous material, one material is solidified and un-solidified powder is completely removed, then another material is laid to be solidified and absorbed until the whole section of this layer is molded; materials are respectively solidified and absorbed by layers and continuously accumulated and overlapped to form a heterogeneous part. The powder laying and recovering device is applicable to selective laser melting molding of the heterogeneous part; the molding parts of a model can be combined at random.

Description

technical field [0001] The invention relates to the field of 3D rapid prototyping, in particular to a powder spreading and powder recovery device for selective laser melting of heterogeneous materials. Background technique [0002] Selective laser melting (SLM) was first proposed by the Frauhofer Institute in Germany in 1885 and developed on the basis of selective laser sintering (SLS) of metal powder. In 2002, the Institute achieved great success in selective laser melting technology, which can directly manufacture completely dense parts at one time. [0003] Laser rapid prototyping technology for metal parts uses high-power or high-brightness laser as a heat source to melt metal powder or wire layer by layer to directly manufacture parts of any complex shape. Represented by SLM, the powder material is spread in the deposition area in advance, and its layer thickness is generally 9-90 μm. The metal powder is melted layer by layer according to the pre-planned scanning path ...

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Problems solved by technology

[0005] In order to achieve the above purpose, the present invention provides a powder spreading and powder recovery device for selective laser melting of heterogeneous materials, which can effectively solve the problems of easy mixing of heterogeneous materials and difficulty in separation and recovery under common powder spreading methods

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