Self-powder-storing selective laser melting powder supplying flexible bidirectional non-redundancy powder laying device

Abstract

The invention relates to a self-powder-storing selective laser melting powder supplying flexible bidirectional non-redundancy powder laying device. The device comprises a powder laying device box body, wherein one swinging cylinder is respectively fixed at the left side and right side of the upper part of the powder laying device box body, the swinging cylinder is connected with quantitative powder supplying wheels, window glass is arranged in front and at the back of the powder laying device box body respectively, a powder laying box cover plate is arranged at the upper part of the powder laying box body, one powder storage bin is formed inside the powder laying box body, two quantitative powder supplying wheels inside the powder laying device box body are parallel to each other horizontally, the quantitative powder supplying wheels are mounted on a mandrel, a quantitative powder supplying wheel sleeve is arranged outside the quantitative powder supplying wheels, a powder slot is formed in the upper surface and lower surface of the quantitative powder supplying wheel sleeve respectively, and the powder slots in the lower surface of the quantitative powder supplying wheel sleeve are respectively corresponding to quantitative powder supplying and powder blocking plates arranged below the powder slost; and the upper part of a powder scraping plate is mounted on a rotatable adjustable powder scraping plate shaft, and pre-tightening springs are respectively mounted on guide pin shafts at the two sides of the powder scraping plate. The device provided by the invention has the advantages that the powder laying efficiency and quality are guaranteed, and oxidation and impurities such as casts which are produced in a 3D printing process can not be easily mixed into a powder supplying cylinder.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a self-storage powder laser selective melting upper powder supply flexible two-way non-redundant powder spreading device. Background technique [0002] Due to the outstanding advantages of laser selective melting (SLM) technology in the preparation of high-performance and high-precision complex parts, it has attracted more and more attention from scientific and technological workers and enterprises, and has become one of the hot spots in the field of additive manufacturing technology research. . Powder laying is one of the important links of additive manufacturing technology. The laying form and effect of powder have a crucial impact on the forming efficiency and forming quality of additive manufacturing. [0003] At present, in the field of laser selective melting metal forming, the powder supply methods can be divided into upper powder supply and low...

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Problems solved by technology

However, there are also some shortcomings in the lower part of the powder supply. For example, although the efficiency of the double-cylinder powder supply is high, the remaining part of the powder after a single powder coating is scraped into the other side of the powder supply tank, although the powder is supplied on the other side. The tank can be reused again and again, but this also greatly increases the possibility that impurities such as oxidation and shedding produced during the printing process will be mixed into the powder supply tank, which will directly affect the quality of the next layer of powder coating and printing quality; although the horizontal bar powder coating can be Avoid impurities such as oxidation and exfoliation from mixing into the powder supply tank, but its powder spreading efficiency is low;

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