Powder conveying and paving mechanism linked with power bed

Abstract

The invention discloses a powder conveying and paving mechanism for enhanced material manufacturing equipment. The powder conveying and paving mechanism comprises a powder conveying mechanism, a powder paving mechanism and a transmission mechanism, wherein a powder conveying box body performs a side-to-side movement on a forming workbench along a guide rail mounted on the side wall of a forming cavity under the driving of a motor; by mounting scraper plates on the two sides of a lower powder opening, the powder is paved left and right when the powder is conveyed; by filling different powder into a hopper, the conveying quantity of the different powder is controlled accurately by controlling the displacement speed of a piston, so that the proportioning of the different material powder can be adjusted; by utilizing the high-speed rotation of a stirrer, the different powder can be mixed evenly; and the proportioning of the powder can be changed for multiple times during the one-step forming process, so that a gradient material component formed by compounding the multiple materials arbitrarily can be prepared. According to the powder conveying and paving mechanism, the volume of the forming cavity is reduced greatly, so that the powder consumption is saved. In addition, the powder conveying and paving mechanism is simple to operate and convenient to adjust.

Description

technical field [0001] The invention belongs to the field of additive manufacturing (rapid manufacturing), and in particular relates to a powder bed follow-up powder feeding mechanism. Background technique [0002] Manufacturing solid parts based on the powder bed process is one of the most commonly used process methods in the field of additive manufacturing (rapid manufacturing). According to different forming principles and realization methods, it mainly includes selective laser sintering (Selective Laser Sintering, SLS), selective laser melting (Selective Laser Melting, SLM), direct metal powder laser sintering (Direct Metal Laser Sintering, DMLS) and electronic Beam melting (Flectron Beam Melting, EBM) and so on. SLS uses low-power laser to sinter low-melting point polymer powder materials; SLM uses high-energy beam laser to directly melt metal powder; DMLS uses laser to sinter binary metal and melt low-melting point metal to form; EBM uses electron beam to melt metal p...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the existing powder bed-based additive manufacturing technology described in the background that it is impossible to realize the follow-up powder feeding and the preparation of gradient materials with arbitrary components, the present invention provides a powder bed follow-up powder feeding mechanism, The mechanism is simple in structure, easy to disassemble and assemble, greatly reduces the volume of the molding cavity, and improves the processing efficiency

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