Klimek Agnieszka, Kluczyński Janusz, Łuszczek Jakub, Bartnicki Adam, Grzelak Krzysztof, Małek Marcin
Institute of Robots and Machine Design, Faculty of Mechanical Engineering, Military University of Technology, 2 Gen. S. Kaliskiego St., 00-908 Warsaw, Poland.
Institute of Civil Engineering, Faculty of Civil Engineering and Geodesy, Military University of Technology, 2 Gen. S. Kaliskiego St., 00-908 Warsaw, Poland.
Materials (Basel). 2022 Mar 8;15(6):1995. doi: 10.3390/ma15061995.
Additive manufacturing (AM) of spare parts is going to become more and more common. In the case of hydraulic solutions, there are also some applications of AM technology related to topological optimization, anti-cavitation improvements, etc. An examination of all available research results shows that authors are using specialized tools and machines to properly prepare AM spare parts. The main aim of this paper is to analyze the influence of quick repair of the damaged slipper-retainer from an axial piston pump by using an AM spare part. Hence, it was prepared with a 100-h test campaign of the AM spare part, which covers the time between damage and supply of the new pump. The material of the slipper-retainer has been identified and replaced by another material-available as a powder for AM, with similar properties as the original. The obtained spare part had been subjected to sandblasting only to simulate extremely rough conditions, directly after the AM process and an analysis of the influence of the high surface roughness of AM part on wear measurements. The whole test campaign has been divided into nine stages. After each stage, microscopic measurements of the pump parts' surface roughness were made. To determine roughness with proper measurements, a microscopical investigation was conducted. The final results revealed that it is possible to replace parts in hydraulic pumps with the use of AM. The whole test campaign caused a significant increase in the surface roughness of the pump's original parts, which was worked with the AM spare slipper-retainer: (1) from Ra = 0.54 µm to Ra = 3.84 µm in the case of two tested pistons; (2) from Ra = 0.33 µm to Ra = 1.98 µm in the case of the slipper-retainer. Despite significant increases in the surface roughness of the pump's parts, the whole test campaign has been successfully finished without any damages to the other important parts of the whole hydraulic test rig.
备件的增材制造（AM）将变得越来越普遍。在液压解决方案方面，AM技术也有一些与拓扑优化、抗气蚀改进等相关的应用。对所有现有研究结果的考察表明，作者们正在使用专门的工具和机器来妥善制备AM备件。本文的主要目的是分析使用AM备件对轴向柱塞泵损坏的滑靴保持架进行快速修复的影响。因此，针对AM备件开展了为期100小时的测试活动，该测试涵盖了从损坏到新泵供应的时间段。已确定滑靴保持架的材料，并将其替换为另一种可作为AM粉末使用的材料，该材料与原始材料具有相似的性能。在增材制造工艺完成后，仅对获得的备件进行喷砂处理以模拟极端粗糙的条件，并分析增材制造部件的高表面粗糙度对磨损测量的影响。整个测试活动分为九个阶段。在每个阶段之后，对泵部件的表面粗糙度进行微观测量。为了通过适当的测量确定粗糙度，进行了微观研究。最终结果表明，使用增材制造来替换液压泵中的部件是可行的。整个测试活动导致泵的原始部件表面粗糙度显著增加，这些部件与AM备用滑靴保持架一起工作：（1）对于两个测试活塞，表面粗糙度从Ra = 0.54 µm增加到Ra = 3.84 µm；（2）对于滑靴保持架，表面粗糙度从Ra = 0.33 µm增加到Ra = 1.98 µm。尽管泵部件的表面粗糙度显著增加，但整个测试活动仍成功完成，整个液压试验台的其他重要部件未出现任何损坏。
