Manufacturing of three dimensional silicate moldings by selective laser beam sintering
Manufacturing of three dimensional silicate moldings by selective laser beam sintering
复制标题
通过选择性激光束烧结制造三维硅酸盐模制品
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
K. Götze
中科院分区：
文献类型：
--
作者：
A. Schwager;J. Bliedtner;A. Bruder;K. Götze
使用传统的制造方法通常无法高效生产复杂的玻璃组件。为了获得釉面三维石英玻璃模制品，研究了选择性激光束烧结的替代方法。使用合成和天然二氧化硅粉末可以通过高温选择性激光烧结 (HT-SLS) 进行增材生产。 19...78 μm 范围内的颗粒直径以及球形和玻璃化颗粒形状允许制造生坯。为此，开发了实验装置以及特定于材料的扫描和参数概念。实现了 ρR = 65 % 的成分密度和 Ra = 32.21 μm 的表面粗糙度。随后通过温度压力烧结生产玻璃状、不透明的模制体。组件密度增加至 ρR = 96%，收缩率为 16%。为了将釉面成型体用作玻璃纤维预制件，需要对壳体表面进行抛光。通过激光束抛光可实现Ra=10.4 nm的表面粗糙度。基本上，HT-SLS 是玻璃粉末经典等静压压制的一种替代方法。特别地，可以实现关于生坯的可生产部件几何形状的效率的提高。
The efficient production of complex glass components is often not possible with classical manufacturing methods. In order to obtain glazed three-dimensional quartz glass moldings, the alternative method of selective laser beam sintering is investigated. Using synthetic and natural silica powders enables an additive production by high-temperature selective laser sintering (HT-SLS). Particle-diameters in the range of 19...78 μm and spheroidal and vitrified particle-shapes allow to manufacture green bodies. For this purpose, an experimental set up as well as material-specific scan and parameter concepts are developed. Component densities of ρR = 65 % and surface roughness of Ra = 32.21 μm are achieved. Subsequently a glassy, opaque molded body is produced by temperature pressure sintering. The component density increases to ρR = 96 % with a shrinkage of 16%. In order to use the glazed molded body as glass fiber preform, polishing of the shell surface is necessary. Surface roughness of Ra = 10.4 nm can be realized by laser beam polishing. Basically, HT-SLS is an alternative method to the classical isostatic pressing of glass powder. In particular, an increase in efficiency with regard to the producible component geometry of the green bodies can be achieved.