Automatic reversing inclined powder laying device and method for mechanical laser selective melting

Abstract

The invention discloses an automatic reversing inclined powder laying device and method for mechanical laser selective melting. A first powder recycling cylinder, a first powder laying brush reset groove, a forming cylinder, a powder cylinder, a second powder laying brush reset groove and a second powder recycling cylinder below a forming platform are arranged in sequence in the length direction of the forming platform. Guide rails for providing guiding and supporting and positioning actions for a powder laying brush are symmetrically arranged above the forming platform. When the powder laying brush is driven by a movement mechanism to move, the powder laying brush can perform reciprocating movement above the first powder recycling cylinder, the first powder laying brush reset groove, the forming cylinder, the powder cylinder, the second powder laying brush reset groove and the second powder recycling cylinder along the track of the guide rails. The device maintains advantages of a currently universal vertical powder laying brush that powder laying is uniform and high in precision, and the powder rebounding phenomenon frequently occurring to the currently universal vertical powder laying brush is also greatly lowered; and the inclined powder laying manner can make a powder laying layer be evener and denser, and meanwhile the service life of an elastic steel sheet is prolonged.

Description

technical field [0001] The invention relates to a powder spreading mechanism used in laser selective melting molding equipment, in particular to a mechanical laser selective melting automatic reversing inclined powder spreading device and method. Background technique [0002] The laser selective melting molding process is a layer-by-layer processing process. The powder spreading device evenly spreads a layer of metal powder in the molding area, and scans the cross-sectional area of ​​the molding part by laser to melt and solidify the powder on the cross-section of the previous layer. Then the forming plane is lowered to a certain height and the process of powder spreading and laser scanning is repeated, and the function of forming three-dimensional metal parts layer by layer is realized. During the processing, the powder spreading quality of the powder spreading device greatly affects the final molding effect. [0003] At present, the common powder spreading methods in lase...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the limitations of the above several powder spreading methods, and provide a mechanical laser selective area melting and automatic reversing inclined powder spreading device and method for better paving and compacting powder in the powder spreading process; It is simple and has a long service life, which overcomes the shortcomings of the existing technology that is prone to powder popping during the powder spreading process

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