Electrostatic surface laying layer system manufactured through powder bed additive

Abstract

The invention provides an electrostatic surface laying layer system manufactured through a powder bed additive. The electrostatic surface laying layer system comprises a formed working table top, a powder supply cylinder and a forming cylinder are arranged below the working table top, a truss mechanism is connected above the working table top through connection plates, the truss mechanism is configured with a sliding rail, the sliding rail is matched with a sliding block, a guide rod is connected to the sliding block, the bottom of the guide rod is connected with an electrode powder pressing plate, the sliding block is controlled by a stepping motor connected to the end of the sliding rail, a ceramic plate and a resistance wire are embedded into an electrode powder pressing plate body of the electrode powder pressing plate, and the ceramic plate is located above the resistance wire. According to the electrostatic surface laying layer system, a mode of electrostatic attraction force is adopted, and charged powder is densely adsorbed to the electrode powder pressing plate, so that the powder is compressed to the surface of a formed piece, and the effect of improving density of parts is achieved; after powder pressing is achieved, the electrode powder pressing plate preheats each layer of powder and the formed piece below the powder, and the phenomena of buckling deformation and the like are avoided; the mobile electrostatic surface laying layer system is high in speed, the powder laying amount is precisely controlled, and production efficiency is improved.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to an electrostatic surface lay-up system for powder bed additive manufacturing. Background technique [0002] In the powder bed additive manufacturing technology, the forming quality is closely related to the powder spreading quality and the preheating effect. Some of the powder bed additive manufacturing equipment on the market currently preheat the bottom layer of the forming area, but as As the number of forming layers increases, the preheating effect will become less and less significant; some equipment preheats the powder supply cylinder, but the forming area has not been significantly improved. Moreover, the preheating time is long, which affects the efficiency of the entire processing process, so it has certain limitations in the process of forming metal parts. [0003] At the same time, in the prior art, the powder spreading device usually uses a roller or a scraper. ...

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Problems solved by technology

[0002] In the powder bed additive manufacturing technology, the forming quality is closely related to the powder spreading quality and the preheating effect. Some of the powder bed additive manufacturing equipment on the market currently preheat the bottom layer of the forming area, but as As the number of forming layers increases, the preheating effect will become less and less significant; some equipment preheats the powder supply cylinder, but the forming area has not been significantly improved

Moreover, the preheating time is long, which affects the efficiency of the entire processing process, so it has certain limitations in the process of forming metal parts

[0003] At the same time, in the prior art, the powder spreading device usually uses a roller or a scraper. When the roller spreads powder, the stick rotates relative to the powder surface, which is prone to electrostatic adsorption and powder sticking, resulting in uneven thickness of the powder spreading surface. 1. Scraper powder spreading can make up for the defects of the roller, but due to the limitation of powder flow, the powder spreading effect is not dense enough, and there are usually gaps between the particles, which easily leads to poor compactness of the formed parts, and after forming During the process, when the surface of the forming part is raised, the scraper will be damaged, which will affect the powder spreading effect. At the same time, the scraper is damaged and needs to be replaced frequently, which is time-consuming and laborious and increases the cost.

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