3D printing device and method for molten metal

Abstract

The invention relates to a 3D printing device and method for molten metal, and belongs to the technical field of 3D printing. The 3D printing device comprises a casing, a first nozzle, a melting-electrode welding electrode and a non-melting-electrode welding electrode, wherein the first nozzle is connected with one end of the casing; a cavity is formed in the middle part of the casing; a first sealing plate and a second sealing plate are arranged in the casing; the melting-electrode welding electrode and the non-melting-electrode welding electrode are positioned in the cavity of the casing; the melting-electrode welding electrode and the non-melting-electrode welding electrode penetrate through the two sealing plates to be arranged; the first sealing plate is provided with a gas inlet, and the second sealing plate is provided with a gas outlet; the gas inlet and the gas outlet are used for allowing noble gases to circulate. According to the 3D printing device and method disclosed by the invention, a wire material extruding hot melting forming manner and a melting forming manner based on fusion welding are creatively combined, high temperature generated by welding arcs enables high-melting-point metal wires to be melted to obtain molten metal, and under the extruding action of the inside pressure of the casing and the nozzle, the molten metal stably and quickly flows out, so that the 3D printing is realized.

Description

technical field [0001] The invention relates to a molten metal 3D printing device and a printing method, belonging to the technical field of 3D printing. Background technique [0002] At present, 3D printing technologies at home and abroad mainly include high-energy beam sintering and melting molding of powder or filamentous materials, filament extrusion hot-melt molding, liquid resin photocuring molding, liquid jet printing molding, sheet / plate / block bonding or welding molding, etc. five forms. [0003] Metal is the most extensive market for 3D printing. At present, the existing methods commonly used for 3D printing of metal materials are: direct metal laser sintering (DMLS), electron beam melting and sintering (EBM), selective laser melting modeling (SLM), selective laser sintering (SLS) and immature Metal 3D printing based on fusion welding method. However, when using the existing technology to print metal materials, only more than ten kinds of metals are supported for...

AI Technical Summary

Problems solved by technology

However, when using the existing technology to print metal materials, only more than ten kinds of metals are supported for processing, such as several specific aluminum-silicon alloys, titanium alloys, nickel alloys and stainless steel, and special metal powders need to be made in advance; The density of metal products is low, up to 98% of castings, which is far lower than the mechanical properties of forgings; the surface accuracy of printed products is poor, and subsequent processing is required; and 3D printing is performed by laser or electron beam, and the production efficiency is extremely low. But the cost is very high. If the 3D printing based on the welding method is used, the efficiency will be higher, and there is no need to make metal powder, but the dripping of metal droplets during printing not only makes the printing process extremely unstable, And the accuracy of the printed products is extremely poor

At present, metal material printing products are rarely used as parts for direct assembly and application

Images