Movable hopper type powder bed powder laying device and method

Abstract

The invention discloses a movable hopper type powder bed powder laying device. The powder bed powder laying device mainly comprises a feeding device, a movable (discharging) funnel, a powder laying device, a related transmission mechanism device and the like. The amount of powder needed by each layer is calculated, and the feeding device is controlled to accurately feed the powder to the movable funnel by using a powder level sensor in the movable funnel. The powder is discharged rapidly and evenly through control over left-and-right moving speed of the discharging funnel, the bore diameter of a discharging opening and the opening and closing degree of the discharging opening, and then the discharged powder is slicked through front and back movement of a powder slicking plate to finish the powder laying process. The powder is discharged rapidly and evenly, the usage amount of the powder is saved, the machining efficiency of rapid forming equipment is increased, and cost is reduced.

Description

technical field [0001] The invention discloses a mobile hopper type powder bed powder spreading device, which can be used in additive manufacturing technology. Background technique [0002] Additive Manufacturing (AM) technology, also known as rapid prototyping technology, is a technology that uses the method of gradually accumulating materials to manufacture solid parts. Compared with the traditional material removal-cutting technology, it is a "bottom-up" Manufacturing method. At present, additive manufacturing technology has become a research hotspot in rapid manufacturing technology. According to the forming principle and implementation method, the current additive manufacturing technology is mainly divided into the following methods: Selective Laser Sintering (Selective Laser Sintering, SLS), Selective Laser Melting (Selective Laser Melting, SLM), contour failure method ( Profile Invalidation Laser Rapid Prototyping (PIRP), Stereo Lithography Apparatus (SLA), Laminate...

AI Technical Summary

Problems solved by technology

In this process, due to the inability to achieve precise control during the unloading process of the hopper, part of the powder is wasted, and due to the large area of ​​the discharge port of the trolley, it is impossible to achieve the same amount of discharge in all directions

[0007] (2) The design of the intermediate hopper structure increases the complexity of the equipment mechanism and the complexity and instability of the processing technology

The feeding process is also equipped with intermediate hopper equipment, which increases the complexity of the processing technology, but does not enhance the applicability. Due to the increase in the number of processes, the instability in the rapid prototyping process increases

[0009] (3) It increases the probability of raw material bonding, which is not conducive to the stability and continuity of the processing process

During the processing, if the powder is bonded together, the processing cannot run normally and continuously, which will affect the processing efficiency

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