Tandecka Katarzyna, Kacalak Wojciech, Mathia Thomas G
Department of Engineering and Informatics Systems, Faculty of Mechanical Engineering and Energy, Koszalin University of Technology, 75620 Koszalin, Poland.
Laboratoire de Tribologie et Dynamique des Systemes (LTDS), Ecole Centrale de Lyon, Centre National de la Recherche Scientifique, 69134 Lyon, France.
Materials (Basel). 2024 Jul 19;17(14):3582. doi: 10.3390/ma17143582.
The paper investigates various methods of microfinishing and arrives at the best technique to produce a very smooth surface. Various setups, with and without oscillation, were developed, together with a microfinishing attachment used on conventional lathes and milling machines. The workpiece material used was an amorphous nickel-phosphorus Ni-P alloy. The surface roughness parameters, such as Sa, Sv, and Sp, were measured with the TalySurf CCI6000 instrument. For the measurement of the surface protrusions, an "analysis of islands" technique was used at various levels of cut-off. The 2BA method-machining below the workpiece axis with oscillation-turned out to be the most effective method applied because it had the highest density of protrusions while having the smallest value of surface roughness. Non-oscillation with the machining zone below the axis also becomes effective, indicating that repositioning can compensate for a lack of oscillation. Already, the very compact surface structure achieved with minimized depths in the valleys by the 2BA method supported the improvement in tribological performance and increase in load-carrying capacity, together with lubricant retention enhancement. These results show that the microfinishing process can be optimized by parameter tuning, and also, non-oscillating methods could come to be a practical alternative, probably reducing the complexity of equipment and cutting costs. Further studies need to be aimed at the scalability of these methods and their application to other materials and fields.
本文研究了各种微精加工方法，并得出了制造非常光滑表面的最佳技术。开发了各种带有和不带有振荡的设置，以及一种用于传统车床和铣床的微精加工附件。所使用的工件材料是一种非晶态镍磷Ni-P合金。使用TalySurf CCI6000仪器测量表面粗糙度参数，如Sa、Sv和Sp。为了测量表面凸起，在不同截止水平下使用了“岛状分析”技术。结果表明，2BA方法（在工件轴线以下进行振荡加工）是最有效的方法，因为它具有最高的凸起密度，同时表面粗糙度值最小。在轴线以下的加工区域进行无振荡加工也很有效，这表明重新定位可以弥补振荡的不足。通过2BA方法在谷底实现最小深度从而获得的非常致密的表面结构，有助于改善摩擦学性能、提高承载能力以及增强润滑剂保持能力。这些结果表明，可以通过参数调整来优化微精加工工艺，而且，无振荡方法可能成为一种实用的替代方法，有望降低设备复杂性和切削成本。进一步的研究应针对这些方法的可扩展性及其在其他材料和领域的应用。
