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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >A simple method for assessing powder spreadability for additive manufacturing
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A simple method for assessing powder spreadability for additive manufacturing

机译：评估添加剂制造粉末铺展性的简单方法

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摘要

Additive manufacturing based on powder spreading is attracting great interest, but one key weakness is that narrow gaps used for spreading produce non-uniformity in the spread layer due to transient jamming. We propose a simple technique for assessing the powder spreadability, a measure of the ease with which a powder is spread uniformly without the formation of empty patches. A cutter blade, with a segment cut along its length to produce a gap, is used to manually spread a small heap of powder. The frequency of formation of empty patches and their size, which are a manifestation of jamming as the particles are spread, are analysed for several gap heights. The sizes of the empty patches and frequency of their formation are determined by image analysis. The outcomes correlate well with a Discrete Element Method simulation of the same system. A criterion is proposed for diagnosing the empty patch formation. (C) 2020 Published by Elsevier B.V.
机译：基于粉末扩展的添加剂制造是吸引着巨大的兴趣，但是一个关键的弱点是由于瞬态干扰而用于扩散的窄间隙在扩散层中产生不均匀性。 我们提出了一种用于评估粉末铺展性的简单技术，粉末在不形成空贴片的情况下均匀地涂抹的易容易性的量度。 用沿其长度切割的切割刀片以产生间隙，用于手动地涂抹一小堆粉末。 分析了几个间隙高度的分析了作为颗粒作为颗粒的表现形式的空贴片及其尺寸的频率。 通过图像分析确定空贴片的尺寸和其形成频率。 结果与相同系统的离散元素法模拟相互作用。 建议诊断空贴形成的标准。 （c）2020由elsevier b.v发布。

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