Mechanical contact-type bidirectional switching powder laying system based on powder bed

Abstract

The invention discloses a mechanical contact-type bidirectional switching powder laying system based on a powder bed. The mechanical contact-type bidirectional switching powder laying system comprises a forming horizontal plate, wherein linear guide rails are arranged on the forming horizontal plate; a bidirectional switching powder laying main body is erected on the linear guide rails; a linear motor slider is arranged on each of the left side and the right side of the bidirectional switching powder laying main body; and the bidirectional switching powder laying main body comprises a powder laying device powder inlet, limiting plates, a contact dual-rectangular sealing plate, powder laying and feeding openings and a scraper plate. According to the mechanical contact-type bidirectional switching powder laying system based on the powder bed, quantitative powder (twice powder laying quantity) is placed in a powder discharging hopper, the powder is placed in the powder laying device powder inlet through the powder discharging hopper under the gravity action, is uniformly distributed on two sides of a powder laying device under the action of left powder distributing openings and right powder distributing openings, the left powder distributing openings and the right powder distributing openings are in linear arrangement and equal in size and quantity, and powder feeding openings on two sides of the powder laying device are opened and closed to realize bidirectional powder feeding switching.

Description

technical field [0001] The invention relates to a mechanical contact type two-way switching powder laying system, which is suitable for additive manufacturing equipment based on powder bed forming, and especially relates to the powder laying structure in laser selective melting / sintering and electron beam selective melting. Background technique [0002] With the rapid development of 3D printing technology, 3D printing technology based on powder bed has received more and more attention, especially laser selective melting SLM (Selective Laser Melting), laser selective sintering SLS (Selective Laser Sintering), electron beam selective melting Technology EBM (Electron beam selective melting), etc. SLM, SLS, EBM and other technologies have also been extensively and in-depth researched, and the improvement of their forming equipment has also continued to mature. Although there are many types and styles of SLM equipment in terms of appearance, internal structure and molding method...

AI Technical Summary

Problems solved by technology

However, 3D printing layer accumulation, the layer thickness is often only tens of microns, forming a part often requires thousands of layers, each layer of powder has a general empty stroke, wasting a lot of time

The cylinder structure often adopts upward powder feeding, and the powder spreading device has a powder loading function. The powder enters the powder spreading device, and the powder spreading device can realize powder supply in both directions. The amount of powder supplied for each stroke is determined by the quantitative device, which increases the weight of the powder spreading trolley, which brings insufficient mechanical stability and increases the energy consumption of each stroke

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