Powder filter type laser in situ forming device

Abstract

The invention discloses a powder filtering type laser in-situ forming device. The powder filtering type laser in-situ forming device comprises a machine frame, a powder spreading device used for spreading metal powder, a laser system used for selectively melting the metal powder, and a driving mechanism used for controlling the powder spreading device; and the powder spreading device comprises a powder spreading box provided with a long strip-shaped material dropping opening in the bottom, a middle filter screen plate used for separating an inner cavity of the powder spreading box into an upper cavity and a lower cavity is arranged in the powder spreading box, a stirring mechanism is arranged in the upper cavity, and the stirring mechanism comprises a powder driving rod which is arranged in the length direction of the powder spreading box and is provided with spiral blades arranged on the outer circle. According to the powder filtering type laser in-situ forming device, the processingquality is guaranteed, and the processing failure caused by mixing of impurities is avoided, especially when residual materials are recycled.

Description

technical field [0001] The invention relates to the field of laser printing, in particular to a powder filter type laser in-situ forming device. Background technique [0002] Rapid prototyping technology is a new type of manufacturing technology developed in the 1980s. This technology is the process of slicing the three-dimensional model of the part, stacking it layer by layer, and finally superimposing it into a three-dimensional solid part. Rapid prototyping technology breaks through the conventional ideas of deformation forming and removal forming, and realizes the concept of "net shape". There are three main types of rapid prototyping: selective laser sintering technology (SLS), laser cladding manufacturing technology (LENS), and selective laser melting technology (SLM). Among them, the parts prepared by selective laser melting technology have high density, high precision, good performance and good processing stability, which have attracted much attention at home and ab...

AI Technical Summary

Problems solved by technology

Asia is mainly concentrated in Singapore, Japan and other countries; in the existing technology, it is generally to control the lifting of the platform to realize the layering of the powder layer to descend in sequence, and realize that the top layer is the next processing layer; and the area of ​​the platform is fixed, and its area corresponds to the processing layer. The bottom area of ​​the area, and for different sizes of workpieces, the volume of the processing area remains the same, so that when processing small-sized workpieces, the space in the processing area still needs to be filled with powder, which makes the processing raw materials polluted and wasteful, and the raw materials are recycled. The processing is cumbersome. At the same time, when processing large workpieces, this technology cannot realize in-situ processing, that is, it needs to be processed and transported to the place of use. The processing efficiency is low, the limitations are large, and the scope of application is limited.

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