Additive Manufacturing ( IF 11.0 ) Pub Date : 2021-08-26 , DOI: 10.1016/j.addma.2021.102212 Lei Zhou 1 , Yi Zhu 1, 2 , Honghao Liu 1 , Tairan He 1 , Chao Zhang 1 , Huayong Yang 1
Laser powder bed fusion (L-PBF), or selective laser melting, can be used to significantly reduce the size and weight of hydraulic components. However, the current design approach still greatly depends on the technician’s experience. The friction loss of the L-PBF fabricated fluid channels is greatly affected by the fabrication quality but remains unknown, which is essential for the design approach. In this study, circular 316L SS fluid channels with various diameters (4–10 mm) and build angles (0–90°) were fabricated using L-PBF. Fabrication quality was characterized, and the friction factors were measured and analyzed. The results indicate that the geometric tolerance and surface roughness are closely related to the build angle. The friction factor of the L-PBF fabricated channels, which is higher than the classical theory in the turbulent flow, is influenced by both channel diameters and build angles. A comprehensive model is developed to predict friction factors of the L-PBF fabricated fluid channels. Design guidelines of fluid channels are proposed, for the first time, by considering both fabrication quality and friction factors.
中文翻译:
一种预测使用激光粉末床融合增材制造制造的流体通道摩擦系数的综合模型
激光粉末床融合 (L-PBF) 或选择性激光熔化可用于显着减小液压元件的尺寸和重量。然而,目前的设计方法仍然在很大程度上取决于技术人员的经验。L-PBF 制造的流体通道的摩擦损失受制造质量的影响很大,但仍然未知,这对于设计方法至关重要。在这项研究中,使用 L-PBF 制造了具有各种直径(4-10 毫米)和构建角度(0-90°)的圆形 316L SS 流体通道。对制造质量进行表征,并对摩擦系数进行测量和分析。结果表明,几何公差和表面粗糙度与构建角度密切相关。L-PBF 制造通道的摩擦系数,在湍流中高于经典理论,受通道直径和构建角度的影响。开发了一个综合模型来预测 L-PBF 制造的流体通道的摩擦系数。通过考虑制造质量和摩擦因素,首次提出了流体通道的设计指南。