Wire metal direct melting 3D printing forming device and process

Abstract

The invention provides a wire metal direct melting 3D printing forming process and device. According to the specific implementation method, one pole of a DC power supply is connected with a metal wire, and the other pole of the DC power supply is connected with a graphite platform. A wire feed pipe and a gas guide pipe are connected with an inner layer and an outer layer of a coaxial spray head correspondingly. When the metal wire in the inner-layer pipe keeps close to the graphite platform, an electric arc for melting metal is formed between the metal wire and the graphite platform. As graphite and liquid metal low-carbon iron have good mutual infiltration effect, the graphite platform is located in a short-circuit current loop, under the function of current, electrified metal liquid drops and a magnetic bottom plate below the graphite platform have the attraction effect on metal, and under the combined action of the three parts, the metal makes good contact with the platform. Siliconcarbide powder can be mixed into gas through protective gas, adheres to the surface of a metal pool and is instantly subjected to sintering to form a silicon carbide ceramic wear-resistant layer. A lead screw drives the coaxial spray head and the graphite platform to move as required. The metal liquid drops continuously drip and are accumulated layer by layer to form a high-performance metal 3D printed product.

Description

technical field [0001] The invention relates to the field of 3D printing rapid prototyping, in particular to a filamentary metal direct melting 3D printing technology and a forming device. Background technique [0002] 3D printing technology is an additive manufacturing technology. Compared with the traditional subtractive manufacturing technology of turning, milling, planing and grinding, it can save raw materials and save model processing time. At present, although the metal 3D printing technology led by selective laser sintering technology has gradually begun to be practically applied in the industry, there are still high equipment (high-power laser transmitters) costs, high raw material (metal powder) costs, and low production efficiency. There are many problems, which seriously limit the popularization of metal 3D printing technology and the expansion of practical industrial application scenarios. SUMMARY OF THE INVENTION [0003] Aiming at the deficiencies of the ex...

AI Technical Summary

Problems solved by technology

At present, although the metal 3D printing technology led by selective laser sintering technology has gradually begun to be practically applied in the industry, there are still high costs for equipment (high-power laser emitters), high costs for raw materials (metal powders), and low production efficiency. Many problems, which seriously limit the popularization of metal 3D printing technology and the expansion of actual industrial application scenarios

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