3D printing system based on Joule heat and used for thermoplastic alloy

Abstract

The invention discloses a 3D printing system based on Joule heat and used for a thermoplastic alloy. A wire feeding device and a hot rolling wheel are oppositely fixed in position; a wire feeding portof the wire feeding device is located in one side of the hot rolling wheel; the hot rolling wheel and a forming base plate are connected to a negative pole and a positive pole of a Joule heat power supply separately; the wire feeding device and the forming base plate are capable of relatively moving; printing wires are conveyed to the forming base plate by virtue of the wire feeding device, and then the wires to be printed are tightly pressed onto the forming base plate through the hot rolling wheel; the hot rolling wheel and the forming base plate form a loop; and the conductive wires are instantaneously softened at the contact ends of the hot rolling wheel and the forming base plate. The device is simple in structure, capable of realizing high-utilization-rate, high-quality, low-cost, green and environment-friendly additive manufacturing for metal parts, and is metal additive manufacturing method integrating materials, machinery, measurement and control technology, and information processing; and moreover, high compactness in a formed sample piece is realized through rolling at the moment of melting the wires to be printed by the hot rolling wheel.

Description

technical field [0001] The invention relates to the field of metal additive manufacturing, in particular to a Joule heat-based thermoplastic alloy 3D printing system. Background technique [0002] Additive manufacturing technology is commonly known as 3D printing technology. Its advantage lies in the rapid and free manufacturing of three-dimensional structures. It is widely used in new product development and single-piece small-batch manufacturing. Among them, metal direct forming is a difficulty and hot spot in additive manufacturing technology. [0003] Due to its unique amorphous structure, amorphous alloys have significantly better mechanical, physical and chemical properties than traditional crystalline alloys, such as high strength, good wear resistance and corrosion resistance, and in supercooled liquid phase The zone also exhibits superplasticity and can be thermoplastically formed, so it is also called thermoplastic alloy. In many fields such as aerospace, precisio...

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Problems solved by technology

It overcomes the limitation of the size and shape of the alloy parts by the traditional amorphous alloy preparation method, but the process of the amorphous alloy 3D printing forming system disclosed in this patent is relatively complicated, because the laser device requires a large amount of energy, and the device occupies a relatively large volume space , high system cost

[0006] For example, the patent document CN109434112A.pdf discloses a space 3D printing system based on amorphous alloy superplastic welding. This system is suitable for the space environment. The internal structure of the prepared non-gold alloy parts is not dense enough, and phenomena such as layered warping will occur.

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