Fluid Delivery in Grinding-A Review of the Term Useful Flow

摘要: Fluid is applied in grinding to aid lubrication, to remove swarf and for bulk cooling. Lubrication reduces frictional forces and subsequently reduces abrasive wear and the generation of heat, leading to improved surface quality and productivity. The correct application of fluid has been the subject of significant recent research effort. A key parameter for establishing the efficiency of fluid delivery in the contact region is ‘useful flow’. This term is generally regarded as a measure of the flow that passes through the grinding contact zone. Application of the term ‘useful flow’is increasingly common, however, no precise definition of useful flow has been forwarded and no firm methodology has been established for its measurement. These anomalies are examined and a review of current definitions and uses of the term optimal useful flow is presented. No attempt is made at a conclusive definition, rather a critical review is undertaken in an attempt to clarify a common position on useful flow. A discussion of key contributing factors to useful flow and a brief description of the methodology for measurement is presented.