A high-temperature preheating device used for 3D printing equipment

Abstract

The invention relates to a high-temperature preheating device used for 3D printing equipment. The high-temperature preheating device is used for laser additive manufacturing equipment (which is mentioned before as additive manufacturing, and should be consistent). A system comprises a vertical heating device, a working cavity heat insulation and preservation device, and a working bench air flow circulating device. A vertical heating system can adopt a single-layer heating pipe according to needs and can also adopt a double-layer heating pipe. The distance between heating layers and the distance between the heating layers and the working bench can be adjusted freely according to needs. The working cavity heat insulation and preservation device effectively plays a role of heat insulation and preservation, avoids damage of other working parts of the additive manufacturing equipment caused by overhigh heating temperature, centralizes heat in a heat insulation and preservation cavity and heats the working bench. The working bench air flow circulating device allows the surface air on the working bench to form circulation and drives the surface air on the working bench to flow, thus allowing the temperature distribution of the working bench to be uniform, and ensuring excellent formation quality of components.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and specifically relates to a method for achieving three-dimensional heating of a high-temperature powder bed, heat insulation and heat preservation of a working cavity, and uniform distribution of a temperature field of a circulating air flow. technical background [0002] Additive Manufacturing (AM) is a widely used rapid prototyping technology. Firstly, the computer three-dimensional solid model of the required parts is designed by CAD three-dimensional modeling software, and then decomposed into a series of two-dimensional solid models according to the process requirements according to a certain thickness. Cross-section, that is to change the original three-dimensional information into two-dimensional plane information, then scan layer by layer, superimpose layer by layer, and finally form the required prototype or part. [0003] In the process of forming parts by additive manufactu...

AI Technical Summary

Problems solved by technology

At present, the domestic more advanced additive manufacturing equipment workbench heating device uses a multi-zone heating device (patent number: 201020274432.9), which divides the workbench into multiple areas, and installs a set of quartz heating tubes and a set of reflectors in each area. plate, which can alleviate the problem of uneven temperature distribution on the worktable, but because of its relatively low heating temperature, it is not suitable for forming high-temperature materials, and because of the large number of installed quartz heating tubes, it cannot effectively save energy. How to increase the preheating The thermal temperature reduces the temperature gradient of the working surface and solves the problem of uneven temperature distribution on the working surface is an important problem faced by additive manufacturing forming equipment for a long time

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