Dot-matrix powder spreading 3D (three-dimensional) printing device and method based on resistance heating

Abstract

The invention provides a dot-matrix powder spreading 3D (three-dimensional) printing device and a dot-matrix powder spreading 3D printing method based on resistance heating. The dot-matrix powder spreading 3D printing device comprises a sealed housing, a feeding port, a hydraulic lifting frame, a dot-matrix resistance heating plate, a powder feeding device, a movable support, a powder spreading device, a powder bed device, a printing base platform, a dummy plate, a lifter and a stepping motor. The dot-matrix powder spreading 3D printing device adopts a mode based on the resistance heating, andadopts a rasterization method to achieve material additive manufacturing printing, and in other words, after space lattice slicing partition is performed on a 3D part, a surface is first partitionedinto array dots, a powder area to be printed on the powder bed on the base platform is heated to melt or sintered so as to achieve face shaping according to each single layer slice of the 3D part, andthen direct shaping is achieved through gradual layer stacking. The dot-matrix powder spreading 3D printing device and the dot-matrix powder spreading 3D printing method based on the resistance heating have the advantages of being low in production cost and high in production efficiency, and shortening a period of preparing the part through powder spreading printing.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a dot-matrix powder-spreading 3D printing device and printing method based on resistance heating. Background technique [0002] Powder-coating 3D printing technology is a rapid and direct forming method for metal parts. At present, laser selective melting (SLM) technology is the most used technology. In addition, there is electron beam selective melting (EBSM) technology. The most basic principle of rapid prototyping is through point scanning. The layer-by-layer melting and stacking manufacturing method directly shapes complex three-dimensional parts. This technology can be used to process and manufacture metal parts with complex structures that cannot be manufactured by traditional processing methods. The parts prepared by this rapid and direct forming method have played an important role in aerospace, biomedical and other fields. [0003] Whether it is laser selective melt...

AI Technical Summary

Problems solved by technology

[0003] Whether it is laser selective melting SLM technology or electron beam selective melting EBSM technology, a single spot or multiple spots scan a surface and then accumulate layer by layer, that is to say, they are all formed from point to surface and then stacked layer by layer. When it comes to body forming, although the above method has high forming precision, the overall part forming cycle is long and the cost is high

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