Effect of blade geometry on the powder spreading process in additive manufacturing

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2024-09-10 DOI:10.1016/j.partic.2024.08.018

Deze Yang , Xihua Chu , Qipeng Liu

引用次数: 0

Abstract

In powder-bed-based additive manufacturing, the quality of the powder bed is closely related to the geometry of the blade used during the powder spreading process. In this study, the spreading process with the vertical blade, inclined blade, and round blade with different radii was performed by discrete element method to investigate the effects of blade geometry on powder spreading. The results show that at the same spreading parameters, the round blade caused the highest density than inclined blade and vertical blade. Increasing the round blade radius can improve the packing density of the powder bed, but it has little effect on the uniformity. The increase in packing density is related to the transitional smoothness of the blade surface at the entrance of the powder bed. The smoother the shape transition of the blade surface at the powder bed entrance, the powders enter the powder bed more gently, so more powders enter the powder bed, resulting in higher packing density. The results may provide suggestions for improving the laser melting process.

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叶片几何形状对增材制造中粉末喷涂过程的影响

在基于粉末床的增材制造中，粉末床的质量与铺粉过程中使用的刀片的几何形状密切相关。本研究采用离散元法对垂直叶片、倾斜叶片和不同半径的圆形叶片的铺展过程进行了研究，以探讨叶片几何形状对粉末铺展的影响。结果表明，在相同的铺展参数下，圆刀片比斜刀片和垂直刀片造成的密度最高。增大圆形叶片半径可以提高粉床的堆积密度，但对均匀性影响不大。堆积密度的增加与粉床入口处叶片表面的过渡光滑度有关。粉床入口处叶片表面的形状过渡越平滑，粉末进入粉床的速度越平缓，因此进入粉床的粉末越多，堆积密度越高。这些结果可为改进激光熔化工艺提供建议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.