Fast multi-sintering additive manufacturing device and method

Abstract

The invention discloses a fast multi-sintering additive manufacturing device and method. The fast multi-sintering additive manufacturing device comprises a powder bed subsystem, a surface sintering subsystem and a line sintering subsystem, wherein the three subsystems are mounted on a frame. The fast multi-sintering additive manufacturing method includes the following steps that 1, each layer of forming area, namely the sintering area, is divided into a surface sintering area and a line sintering area surrounding the surface sintering area; 2, a heat radiation source is arranged above a powder bed; 3, a layer of forming powder is laid on the powder bed; 4, the line sintering areas are formed through sintering on the layer of forming powder; 5, the absorption rate of part of the area of working layer forming powder to radiation of the heat radiation source is changed; 6, a layer of forming powder is laid on the powder bed again to form the working layer forming powder; 7, the line sintering areas are formed through sintering on the layer of forming powder; 8, the absorption rate of the working layer forming powder is changed; and 9, the step 6 to the step 8 are repeated till the whole forming process is completed. The fast multi-sintering additive manufacturing device and method have the advantage that surface sintering and line sintering are combined, so that the forming speed is increased, and the forming precision is guaranteed.

Description

technical field [0001] The invention relates to a rapid multi-sintering additive manufacturing equipment and method, which belongs to the additive manufacturing technology, and particularly belongs to the technical field of additive manufacturing based on powder sintering. Background technique [0002] At present, additive manufacturing technology has been widely used in industrial production after decades of development. Among them, the selective laser sintering (SLS) technology sinters the powder together by laser scanning to form the required parts. It has a wide range of application materials, high molding precision, and good mechanical properties of the parts, so it is getting more and more in the field of industrial applications. Many applications to make functional parts. [0003] US patent US 4863538 A discloses a method and apparatus for manufacturing components by selective sintering. The equipment includes a computer-controlled laser to direct laser energy onto ...

AI Technical Summary

Problems solved by technology

[0007] To sum up, the disadvantage of the traditional existing technology is that the traditional SLS / SLM molding method is one or several laser line scanning molding, and the molding speed is slow; the powder-based 3DP additive manufacturing technology is powder-oriented Spraying glue, its initial molding strength is not high, subsequent processing is complicated, and it is difficult to form functional parts

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