A high vacuum multifunctional metal 3D printing equipment

Abstract

The invention discloses a high-vacuum multi-functional metal 3D printing device, which comprises a vacuum chamber, a vibrating mirror located on the top of the vacuum chamber, and a laser connected to the vibrating mirror. Powder roller, the bottom of the vacuum chamber is provided with a workbench, the bottom of the workbench is provided with a working cylinder and a lifting platform; a sealing unit is arranged between the workbench and the lift platform for realizing The sealing of the working cylinder and the lifting platform; the powder falling unit, including the powder falling hopper and the powder barrel; the heating and cooling integrated unit, which is arranged on the workbench and is used to heat or heat the metal powder or 3D printing parts cool down. The equipment of the present invention can realize 10 ‑3 Pa and higher vacuum degree, realize selective laser melting, laser near-net shaping or laser cladding repair multifunctional integration, integrate the heating-cooling function of the substrate, can realize powder preheating and formed parts rapid cooling, larger Minimize production cost.

Description

technical field [0001] The invention belongs to the field of metal 3D printer manufacturing, and in particular relates to a high-vacuum multifunctional metal 3D printing device. Background technique [0002] High energy beam 3D printing (also known as additive manufacturing) is a type of rapid prototyping technology. Based on digital model files, this technology uses powdered metal or plastic and other bondable materials to transform complex three-dimensional processing into simple two-dimensional processing through continuous physical layer superposition, which greatly reduces the difficulty of forming complex parts. Therefore, it is expected to solve the problem of forming and manufacturing complex structural parts that cannot be completed by traditional processing technology. In recent years, 3D printing technology has been gradually applied to the manufacture of actual products, among which the 3D printing technology of metal materials has developed particularly rapidly...

AI Technical Summary

Problems solved by technology

[0004] (1) When commercially available equipment is used for laser 3D printing of metal powder, it is usually necessary to continuously feed inert protective gas to prevent metal powder from being oxidized under the action of laser light, but long-term consumption of inert gas will undoubtedly greatly increase manufacturing costs

Low vacuum and high oxygen content are easy to form oxides during 3D printing of oxidation-sensitive metal materials, thereby reducing the mechanical properties of 3D printed parts

[0005] (2) The function of the equipment is single. For example, a 3D printing equipment can only achieve selective laser melting (SLM), laser near-net shaping (LENS) or laser cladding repair. If the above functions can be integrated, sharing a laser, Resources such as galvanometers and mechanical devices will greatly reduce production costs

However, most of the current equipment uses substrate heating to preheat the powder, without cooling function, and the substrate / workbench is insulated with a heat shield

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