Collaborative Research: Design and Fundamental Understanding of Advanced Minimum Quantity Lubrication (MQL) Machining using Nanolubricants

本合作研究项目的目的是研究与有机分子结合的活性二硫化钼纳米润滑剂的变形机理。当引入最小数量的润滑磨削和深孔钻削时，将特别研究塑性变形以及摩擦膜的形成。寻求这一目标的技术途径首先需要研究与机械加工中使用的基础油相匹配的活性润滑剂纳米颗粒的物理、化学和摩擦学性能。在这项研究的下一阶段，将研究纳米润滑剂配方的浓度和数量、切割深度、加工速度和加工道次的作用。采用各种原位和非原位参数，如切削力、刀具磨损、工件表面光洁度和完整性、纳米和微观结构、摩擦膜的位置、分布和化学成分，以及磨屑的大小和化学成分，对结果进行实验和部分理论评估，以研究摩擦膜在降低切削力、提高刀具寿命和提供更好的已加工工件表面质量方面的作用。此外，一项研究将致力于了解集成在纳米颗粒中的油分子的瞬时蒸发以及它们作为机械加工界面热传递的有效载体的作用。这项研究的广泛影响是促进循环润滑系统的更换，循环润滑系统是性能差异和重大废流的来源。此外，在要求最苛刻的加工应用中，预计将以低成本节省能源并提高生产率。此外，这项研究是一个例子，说明美国最近对纳米制造的投资如何显著有利于传统的机械加工和制造业，以提高一系列与基础设施相关的制造业的生产率。对学生进行这种纳米技术的培训将是促进新一代创新的重要组成部分。

The objective of this collaborative research project is to study the mechanism of deformation of active molybdenum disulphide lubricant nanoparticles, integrated with organic molecules. The plastic deformation, and thus formation of a tribofilm, will be studied particularly when introduced in minimum quantity lubrication grinding and deep hole drilling. The technical approach to seek the objective necessitates first to study physical, chemical and tribological properties of active lubricant nanoparticles compatible with base fluids used in machining. In the next phase of this study the role of concentration and quantity of nanolubricant formulations, depth of cut, speed and number of machining passes will be investigated. The outcome will be assessed experimentally and partly theoretically using various in situ and ex situ parameters such as cutting forces, tool wear, surface finish and integrity of the workpiece, nano and micro structure, location, distribution and chemistry of the triobofilm, and size and chemistry of debris for studying the role of tribofilm in reducing cutting forces, increasing tool life and providing better surface quality of the machined workpiece. Additionally, one study will address understanding the transient evaporation of oil molecules integrated in nanoparticles and their subsequent role as an effective vehicle for heat transfer at the machining interface.The broad impact of this research is in facilitating the replacement of recirculating lubrication systems, which are sources of performance variation and significant waste streams. In addition, it is expected there will be energy savings and an increase in productivity at low cost in the most demanding machining applications. Further, this research is an example of how recent investment in nanomanufacturing in the United States can significantly benefit traditional machining and manufacturing industries to increase productivity in a range of infrastructure-related manufacturing industries. Training students in this nanotechnology will be an important component in the facilitation of a new generation of innovation.