A kind of laminated manufacturing equipment and method applied to metal additive manufacturing

Abstract

The invention discloses a laminated manufacturing equipment and method applied to metal additive manufacturing; the laser cutting system includes: a cutting laser system A and a cutting abutment system B; the cutting abutment system B is arranged at the bottom of a molding room, and It is used to supply the metal strip to be laser cut; the cutting laser system is set on the upper part of the forming room, and is used to cut the metal strip into metal slices of the required shape through the laser according to the planned path. The laser welding system includes: welding laser system C and welding base system D; metal slice conveying system E is used to transport the metal slices completed on the cutting base system to the lifting welding forming cylinder of welding base system D; welding laser System C is used to form the metal slices stacked on the lifting welding forming cylinder according to the planned path, through laser welding layer by layer, and then obtain the complete metal parts of the desired shape.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to a laminated manufacturing equipment and method applied to metal additive manufacturing. Background technique [0002] Additive manufacturing technology, that is, 3D printing, is a kind of digital model directly based on the parts to be manufactured, using a "bottom-up" layer-by-layer accumulation method different from traditional machining, relying on additive manufacturing equipment to manufacture physical parts emerging manufacturing technologies. Compared with traditional manufacturing technology, additive manufacturing can form and manufacture parts with complex shapes under individual requirements, and has the advantages of short development cycle, saving raw materials, low cost and small design limitations. The parts formed by additive manufacturing technology have many advantages such as high precision, high strength, compact structure, metallurgical combination, etc...

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Problems solved by technology

[0004] The existing additive manufacturing technology applied in the field of metal parts manufacturing still has many shortcomings: each layer of the preset powder feeding mode additive manufacturing technology needs to be scanned and melted by laser beam or electron beam, and the forming time is relatively long , It takes several hours to ten hours or even tens of hours; the metal parts manufactured by the traditional metal additive method are small in size, and are more widely used in the medical field. There are few applications in the field of added value; although the metal parts manufactured by the traditional metal additive method have better precision, strength, and density, they still have shortcomings such as large internal stress, and the formed parts have defects such as spheroidization, warping, and splashing; In the metal additive manufacturing method, it is inevitable to add support during the part forming process. In some occasions with high requirements on the forming surface, the removal of support will affect the surface characteristics of the formed part. Improper support addition will also lead to defects such as warping and deformation of the formed part. ; The size of metal dust is very small, and it is easy to disperse into the air, causing adverse effects on the health of the staff and the surrounding environment; moreover, the raw materials of the traditional metal additive method are mainly metal powder, and the price of metal powder is relatively high. Increased production costs, limiting the promotion and application of metal additive manufacturing methods

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