A rod remelting direct writing forming equipment and a rod remelting forming method

Abstract

The invention relates to the technical field of additive manufacturing, and discloses a bar remelting direct-writing forming equipment and a bar remelting forming method, including a feeding system, a pulping system, and a molding system. Rods made of solid particles and provide rods to the pulping system; the pulping system includes a pulping cylinder and an extrusion push rod that can extend into the pulping cylinder and move and rotate relative to the pulping cylinder. There is a heating device at the bottom of the barrel, which is used to heat the part of the rod in the pulping barrel to form a semi-solid slurry, and the extrusion push rod moves along the axis of the pulping barrel against the bar to make the semi-solid The solid slurry is extruded and shaped onto a forming system. The rod formed by mixing solid particles is used as the raw material, and the semi-solid slurry is formed by local heating, and the structure is controllable. The forming equipment has a simple structure, low cost, and the formed part has a uniform structure. The forming method facilitates effective control of the flow behavior of the semi-solid slurry.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a rod remelting direct writing forming equipment and a rod remelting forming method. Background technique [0002] Additive manufacturing technology is based on a digital model file, using powdery, filamentary metal or plastic and other bondable materials to form parts by layer-by-layer printing. Metal additive manufacturing processes based on high-energy beams usually use high-energy beams as the heat source. The printing equipment has a complex structure and high equipment and material costs; Defects and greater internal stress are produced. [0003] Patent No. CN106925783A discloses a high-efficiency metal 3D printing equipment and method, which combines the preparation process of liquid metal slurry with the process of additive manufacturing. The form is continuously ejected, and the cooling medium is used for rapid cooling during printing, and the printing p...

AI Technical Summary

Problems solved by technology

Although this method consciously creates the nucleation process through the spinning tube, the preparation of the semi-solid slurry requires a large number of uniform nucleation cores, and precise control of the holding temperature and holding time is required to achieve control over the growth behavior of primary particles , it will be difficult to prepare a highly viscous semi-solid slurry with controllable flow behavior only through the chilling effect of the smooth area of ​​the spinning tube

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