A kind of three-dimensional printing method

Abstract

Disclosed is a three-dimensional printing method, comprising the following main process: placing molten materials in a forming area of a three-dimensional printing device; accumulating the molten materials in the forming area, and converting same into a printed body; and accumulating the molten materials on the basis of the printed body until an object to be printed is formed, wherein in the process of accumulating the molten materials, the portion, where the molten materials are to be accumulated, of the printed body is melted or softened in an electromagnetic induction heating manner, and / or the portion, where the molten materials are being accumulated, of the printed body is melted or softened. The present invention has the beneficial effects that the interlayer binding force of the printed body is high, and the structural strength of the printed body is high; a detachable auxiliary supporting body can be generated synchronously so that printing of a complex structure can be achieved; a device structure is simple; a large-sized component can be printed; the three-dimensional printing method is suitable for multiple types of materials, and three-dimensional printing of electrically-conducive materials such as metal, metal ceramics, and mixed metal power can be achieved; and the cost is low. The present invention has a substantial improvement.

Description

technical field [0001] The invention relates to three-dimensional printing technology, in particular to a three-dimensional printing method based on electromagnetic induction heating, which 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. Common mainstream 3D printing technologies, such as stereolithography (StereoLithography Apparatus, SLA), fused deposition manufacturing (Fused Deposition Modeling, FDM), selective laser sintering (Selecting Laser Sintering, SLS), three-dimensional powder bonding (Three DimensionalPrinting and Gluing, 3DP), was commercialized in the United States in the 1980s and 1990s. Currently commercialized technologies for 3D printing of metal materials mainly include Selective Laser Melting (SLM), Electron Beam Melting (EBM) an...

AI Technical Summary

Problems solved by technology

In view of the shortcomings of the above-mentioned SLM, EBM and LENS technologies, many low-cost metal 3D printing technologies using other forming methods have emerged, for example, the application number is 201510789205.7, and the name is "a method for direct 3D printing manufacturing using liquid metal and Device" Chinese patent application, the application number is 201510679764.2, and the name is "a metal 3D printing rapid prototyping equipment", and the application number is 201410206527.X, the name is "extrusion type metal flow 3D printer" Chinese patent applications, but these technologies have problems such as low molding accuracy or low interlayer bonding of printed metal parts

There are also metal 3D printing methods based on the principle of arc heating. For example, the Chinese patent application with the application number 201410617953.2 and the name "Method for Electrofusion Forming of Metal Components" has low cost, but there are many disadvantages, such as: extremely low forming accuracy, and arc damage. Destruction of the previously formed structure, poor controllability of the arc, difficulty in focusing and miniaturization of the arc, and inability to manufacture complex and fine structures

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