Metal three-dimensional printing method and equipment thereof

Abstract

The invention discloses a metal three-dimensional printing method and equipment thereof. The metal three-dimensional printing method comprises the following steps that melted and flowable metal or softened and flowable metal is put into a molding area used by three-dimensional printing equipment; after not having the flowability, the melted and flowable metal or the softened and flowable metal is converted into printed and molded metal; the melted and flowable metal or the softened and flowable metal is accumulated based on the printed and molded metal until an object to be printed is molded; the object to be printed is formed by the accumulated printed and molded metal. The key characteristics of the metal three-dimensional printing method disclosed by the invention lie in that during molding, binding force between layers and binding force between pixel points are changed in a manner of resistance radiation, and a printing area for performing resistance radiation can be set; a metal part generated by the metal three-dimensional printing method disclosed by the invention is high in strength, high in density, and high in molding accuracy; molding process of each pixel point is monitored; a dismountable assisting bracket can be synchronously generated; a large-scale part can be printed; the equipment is simple in structure and low in cost. The metal three-dimensional printing method and the equipment thereof disclosed by the invention have a substantive progress.

Description

technical field [0001] The invention relates to three-dimensional printing technology, in particular to a metal three-dimensional printing method and equipment thereof, and belongs to the technical field of additive manufacturing. Background technique [0002] 3D printing technology first originated in the United States at the end of the 19th century, and was perfected and commercialized in Japan and the United States until the 1970s and 1980s. Now common mainstream 3D printing technologies, such as stereolithography (Stereo Lithography Apparatus, SLA), fused deposition manufacturing (Fused Deposition Modeling, FDM), selective laser sintering (Selecting Laser Sintering, SLS), three-dimensional powder bonding (Three Dimensional Printing and Gluing, 3DP), was commercialized in the United States in the 1980s and 1990s. The currently commercialized technologies for 3D printing of metal materials mainly include Selective Laser Melting (SLM) and Electron Beam Melting (EBM), but S...

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Problems solved by technology

In view of the shortcomings of the above-mentioned SLM and EBM technologies, there have also been many low-cost metal 3D printing technologies using other forming methods, for example, the application number is 201510789205.7, and the name is "a method and device for direct 3D printing and manufacturing using liquid metal" Chinese patent application, application number 201510679764.2, titled "A Metal 3D Printing Rapid Prototyping Equipment", and application number 201410206527.X, titled "Extrusion Metal Flow 3D Printer" However, these technologies have problems such as low molding accuracy or low interlayer bonding of the printed metal layer

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