Development of electrostatic solid lubrication system for improvement in machining process performance
Development of electrostatic solid lubrication system for improvement in machining process performance
复制标题
DOI：
10.1016/j.ijmachtools.2010.05.007
复制
发表时间：
2010-09
影响因子：
14
通讯作者：
N. S. Reddy;M. Nouari;Min-Yang Yang-Min-Yang-Yang-2379405
中科院分区：
文献类型：
--
作者：
N. S. Reddy;M. Nouari;Min-Yang Yang-Min-Yang-Yang-2379405
液体润滑剂传统上用于控制加工中的高热量产生;然而，切削液的使用在员工健康和环境污染方面变得更加成问题。最小化或可能消除切削液，以其他方式取代其功能，正在成为机械加工研究的一个重点领域。固体润滑剂辅助切削是一种新型的切削加工方法，可以在不污染环境的前提下控制加工区域的温度。本研究的重点是探索在AISI 4340钢钻孔中应用石墨作为润滑介质的可能性，作为减少摩擦产生的热量的一种手段，以寻找传统冷却剂的替代品。为此，一个优化的固体润滑剂的应用方法，静电固体润滑实验装置已被设想为有效的供应固体润滑剂混合物作为高速射流，并在极低的流量到加工区，从而满足环境要求。在保持其他条件不变的情况下，根据推力、刀具磨损、切屑厚度、孔直径和加工工件的表面光洁度来判断工艺性能。还提供了在湿和干加工中获得的结果的比较。从实验中获得的结果表明，使用的固体润滑剂作为一个可行的替代湿和干加工，通过降低切削区温度和有利的变化，在芯片工具和工作工具的相互作用的有效性。正确选择和应用固体润滑剂可以降低成本，这一概念可能成为传统冷却剂的有效替代品。
Liquid lubricants have traditionally been used to control the high heat generation in machining; however, the use of cutting fluid has become more problematic in terms of both employee health and environmental pollution. Minimization or possible elimination of cutting fluids substituting their functions by some other means is emerging as a thrust area of research in machining. Solid lubricant assisted machining is a novel concept to control the machining zone temperature without polluting the environment. The focus of this study is to explore the possibility of application of graphite as a lubricating medium in drilling of AISI 4340 steel, as a means to reduce the heat generated due to friction, towards finding an alternative to conventional coolants. To this end, an optimized solid lubricant application method, electrostatic solid lubrication experimental setup has been envisaged for effective supply of solid lubricant mixture as a high velocity jet and at an extremely low flow rate to the machining zone, thus meeting environmental requirements. The process performance is judged in terms of thrust force, tool wear, chip thickness, hole diameter and surface finish of machined workpiece keeping the other conditions constant. A comparison with the results obtained in wet and dry machining is also provided. The results obtained from the experiments show the effectiveness of the use of the solid lubricant as a viable alternative to wet and dry machining through reduction in the cutting zone temperature and favourable change in chip–tool and work–tool interaction. The proper selection and application of solid lubricant can lead to low cost, and this concept could emerge as an effective alternative to conventional coolants.