3D material additive manufacturing process

Abstract

The invention discloses a 3D material additive manufacturing process. The 3D material additive manufacturing process is characterized by comprising the following steps: step 1, heating materials to a semi-molten state; step 2, extruding the materials into strip-shaped blank in a mode of enabling an extruding head to fit with a mould surface of a mould; and step 3, repeating the step 2, enabling adjacent strip-shaped blank to splice or stack with each other, performing a molten-state or semi-molten-state jointing on a joint of adjacent strip-shaped blank to obtain a prefabricated part or welding through friction stir welding to obtain the prefabricated part. The 3D material additive manufacturing process is suitable for thermoplastic nonmetal materials and metal materials, and has the advantages of a wide range of application, low cost and good mechanical performances of workpieces obtained by manufacturing.

Description

technical field [0001] The invention relates to an additive manufacturing process, in particular to a 3D additive manufacturing process. Background technique [0002] Additive Manufacturing (AM) technology is a general term for a technology that is directly driven by a CAD model and accumulates materials layer by layer or point by point into solid parts. It is an emerging technology that is rapidly developing in the manufacturing field. It is called It is an emerging advanced manufacturing technology that has received widespread attention in recent years and is considered to be another major breakthrough in the field of manufacturing technology. Additive manufacturing technology can manufacture functional parts of almost any complex structure that cannot be processed or is difficult to process by traditional techniques, which can effectively save materials, reduce processing procedures and manufacturing time. It has great practical value and broad application prospects in t...

AI Technical Summary

Problems solved by technology

[0004] The mechanical properties are poor. Since the essence of 3D printing is micro-casting by region-selective melting, the overall part can basically be regarded as a casting shape, with complex internal stress and coarse and uneven structure crystals. Except for very few material grades in high-temperature alloys, they are suitable for 3D printing. , the mechanical properties of the as-cast state reach those of the rolled and forged state, and the mechanical properties of 3D printed workpieces made of aluminum alloy, titanium alloy, copper alloy, carbon steel, alloy steel, etc. are much different from those of rolled and forged materials of the same material;

[0005] There are only more than 200 kinds of materials suitable for 3D printing that have been developed. Compared with traditional processing methods, they have the disadvantage of small adaptability

[0006] The powder raw materials used for printing grades have a single grade, poor supply, and are expensive. Because the demand market is small, the supply is insufficient. high cost

[0007] Low efficiency. When 3D printing metal materials, the stacking thickness of each layer of metal materials is about 0.05mm. When producing larger components, it may even take several weeks. Because of its low production efficiency and high production costs, it is difficult to widely use application