Powder-material-oriented SLM/SLS powder laying technology

Abstract

The invention discloses a powder-material-oriented SLM (selective laser melting) / SLS (selective laser sintering) powder laying technology. Manufacturing through selective powder laying and selective laser melting individual gradient material is achieved. According to the main function, powder of different material components can be precisely laid on a powder bed in a fixed-point manner through a plurality of spraying heads, and then, through SLM / SLS manufacturing, continuous gradient changes of materials between different portions can be achieved. Along the material proportioning line, powder laying is carried out, through cooperation of all flow controllers, mixed powder with different proportions can be obtained, the proportion of different kinds of powder can be adjusted in advance, and then powder laying is carried out; in the powder laying process, the proportion of different kinds of powder can be dynamically adjusted, and continuous gradient changes of the materials between the different portions can be achieved.

Description

technical field [0001] The invention relates to a powder spreading process, in particular to a powder material-oriented SLM / SLS powder spreading process. Background technique [0002] Large bone defects seriously affect human health and quality of life of patients, and become a serious social problem. At present, orthopedics and surgery urgently require prostheses with multi-material gradient structures to meet the different needs of different parts for the mechanical properties of materials. For example, the artificial articular surface requires high strength and good wear resistance, and cobalt-based alloys can be used, while the joint stem requires light weight, good biocompatibility, high specific strength and avoiding stress shielding, and titanium alloys are generally used. [0003] Additive Manufacturing (AM), that is, 3D printing technology, is known as an important symbol of the third industrial revolution and has important applications in the medical field. Using...

AI Technical Summary

Problems solved by technology

However, the powder coating device of the current selective laser melting technology can only process one material at a time, which is difficult to meet the manufacture of personalized gradient materials, which is a bottleneck hindering the development of 3D printing.

The existing powder spreading device is difficult to meet the production of gradient materials, it is necessary to develop a new device

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