A metal additive manufacturing method and device

Abstract

The invention discloses a metal additive manufacturing method, which includes building a part structure and a support structure layer by layer. When constructing the support structure, the support structure is constructed by using an adhesive to bond metal powder materials; after the part is formed, The adhesive is melted or dissolved by heating at high temperature or dissolved in an organic solvent to remove the supporting structure. The invention also discloses a metal additive manufacturing device used in the method, including a high-energy beam source, an optical unit, a forming chamber, a forming cylinder located in the forming chamber, and a powder spreading device. The forming chamber is also equipped with a glue spraying device, and the glue spraying device Used to provide the adhesive required to build the support structure in the above method. With the support structure constructed by the method and device of the present invention, after the part is formed, it only needs to be heated at high temperature or dissolved in an organic solvent to melt or dissolve the binder, and then the support can be removed without subsequent processing, saving Reduce the cost of post-processing and improve the forming efficiency.

Description

Technical field [0001] The invention belongs to the technical field of metal additive manufacturing, in particular to a metal additive manufacturing method, and also to a metal additive manufacturing device used in the method. Background technique [0002] Additive manufacturing technology, born in the late 1980s, is a rapid prototyping process based on the principle of material accumulation. It is a kind of digital model file based on the use of powdered metal or plastic and other non-metal bonding materials through layer-by-layer accumulation The technology of constructing objects in a different way is not limited by the complexity of parts, and is fully digitally controlled. [0003] As an important part of additive manufacturing technology, metal additive manufacturing mainly uses metal powder, particles or metal wires as raw materials, pre-layered through CAD models, and uses high-power laser beams to melt and build three-dimensional objects. This technology has changed the p...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a metal additive manufacturing method, the support structure generated by this method is easy to remove, which solves the problem that the existing support structure needs to be removed by machining and affects the forming quality of the parts

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