Ded arc three-dimensional alloy metal powder printing method and apparatus using arc and alloy metal powder core wire

Abstract

Disclosed are a DED arc three-dimensional alloy metal powder printing method using an arc and an alloy metal powder core wire, and an apparatus therefor. A DED arc three-dimensional alloy metal powderprinting method, according to an embodiment of the present invention, comprises the steps of: (a) connecting a three-dimensional printing part mold with a first electrode via a ground line, contacting a second electrode, in which an electrode contact tip is tapped on a peripheral surface of an alloy metal powder core wire, with a part of the surface of the printing part of the mold, and then generating an arc by a potential difference between the first electrode and the second electrode to melt the front end of the alloy metal powder core wire and the surface of the printing part at the sametime; (b) forming a monolayer by mixing and coagulating the melt of the alloy metal powder core wire and the melt of the surface of the printing part; and (c) stacking the monolayer by continuously performing a monolayer overlay.

Description

technical field [0001] The invention relates to a printing method and a device thereof for directed energy deposition arc three-dimensional alloy metal powder, and in more detail relates to a printing method and device thereof for directed energy deposition arc three-dimensional alloy metal powder using electric arc and alloy metal powder cored wire. Background technique [0002] In directed energy deposition 3D printing, digital design data is created by computer modeling and differentiated into two-dimensional planes, and then undifferentiated materials are printed on the surface using a 3D printing device. This is a technology that continues to stack printed materials in a layer-by-layer manner to prepare three-dimensional products. As a concept in contrast to cutting materials or subtractive manufacturing (Subtractive Manufacturing), the official term is called Additive Manufacturing (AM: Additive Manufacturing) or Rapid Prototyping (RP: Rapid Prototyping). 3D printing ...

AI Technical Summary

Problems solved by technology

Directed energy deposition laser beam three-dimensional alloy metal powder printing induces quenching through high energy output and high input temperature to produce an increase in strength and a decrease in elongation, so it can be seen that the laser beam is not suitable as a heat source

[0026] As shown in Table 2, in the case of using directed energy deposition laser beam three-dimensional alloy metal powder printing, the first disadvantage is as follows: when printing, the equivalent welding procedure qualification test ( Welding Procedure Qualification Test) to obtain the actual data of the printing part, and use it to print the design of the three-dimensional alloy metal powder that needs to be deposited into the energy.

[0027] The second disadvantage of directed energy deposition laser beam 3D alloy metal powder printing is as follows: in order to inject fine metal powder of about 20 to 100 μm while injecting laser beam, it is necessary to stabilize the system so that it is not affected by external influences

It is necessary to build all the equipment in one chamber and system, so it can only be large-scale and fixed, and there is a problem of cost

Therefore, the size of the bed used to print metal products is limited and therefore the size of the product is also limited

[0028] The maximum size of the shape that can be manufactured by the powder bed fusion technology based on the cross-section is limited to approximately 25cm×25cm, which is suitable for the manufacture of simple metal prototypes. On the contrary, as the existing directed energy deposition laser beam three-dimensional alloy metal powder printing technology commercial The maximum printing device is limited to 2m×1m×1m

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