Selective laser sintering SLS laid powder preheating device

Abstract

The invention provides a selective laser sintering SLS laid powder preheating device. The selective laser sintering SLS laid powder preheating device comprises stand columns, lead screws, driving motors, an upper support, a lower support, height adjusting plates, infrared temperature measuring devices, a plurality of rectangular pyramid hollow shells and a control system, wherein each rectangular pyramid hollow shell, a heating rod inside the rectangular pyramid hollow shell and a reflector on the inner wall of the rectangular pyramid hollow shell form a corresponding independent preheating device; and the independent preheating devices divide a forming region into a plurality of small regions capable of preheating independently, are directly controlled by the control system and do not interfere one another. When temperatures of different regions of the laid powder are different, the independent preheating devices can be adjusted to preheat the different regions at different temperatures, so that the laid powder is integrally preheated uniformly; and the direction of each independent preheating device in three-dimensional space is adjustable, the preheating regions can be adjusted according to the size of a formed part, preheating efficiency is improved, and energy is saved. By the selective laser sintering SLS laid powder preheating device, the precision and the structure property of the formed part can be improved effectively; and the selective laser sintering SLS laid powder preheating device has an important significance on development of an SLS forming technology.

Description

technical field [0001] The invention belongs to the technical field of 3D printing additive manufacturing, and relates to a selective laser sintering SLS powder spreading and preheating device. technical background [0002] 3D printing rapid prototyping technology is based on a three-dimensional CAD model, using bondable materials such as powdered metal or resin, and manufacturing complex parts through the principle of layer-by-layer superposition. The process can produce complex parts of any shape without the need for traditional tools, fixtures and machine tools. Its main features are: Design and manufacture are integrated, and the three-dimensional model is directly printed and formed, which realizes the integration of design and manufacture to a certain extent. Highly flexible, this technology is not restricted by the shape and structure of parts, so that complex models can be directly manufactured into product models. ③Shorten the development cycle of new products ...

AI Technical Summary

Problems solved by technology

The preheating of the laid powder in the SLS forming process is an important link. If the laid powder is not preheated or preheated unevenly, the performance and precision of the formed part will decrease, and even sintering cannot be formed.

Images