Application of Lubrication Theory to Fluid Flow in Grinding: Part II—Influence of Wheel and Workpiece Roughness
Author:
Hryniewicz P.1, Szeri A. Z.1, Jahanmir S.2
Affiliation:
1. Department of Mechanical Engineering, University of Delaware, Newark, DE 19716-3140 2. Ceramics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8520
Abstract
The objective of this study is to model fluid flow in grinding with nonporous wheels. While Part I focused on the flow in a simplified smooth geometry, in this part the wheel surface roughness is introduced. The applicability of the modified Reynolds equation for laminar flows between rough surfaces is verified experimentally in terms of the developed hydrodynamic pressure, using a resin-bonded diamond grinding wheel. The experiments were performed under the spark-out condition (i.e., with the wheel just touching the workpiece) and in actual grinding. Agreement between theory and experiment is shown for Re<100, but a significant discrepancy (most likely due to turbulence) is observed for 300<Re<1500.
Publisher
ASME International
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference13 articles.
1. Schumack, M. R., Chung, J. B., Schultz, W. W., and Kannatey-Asibu, E., 1991, “Analysis of Fluid Flow Under a Grinding Wheel,” ASME J. Eng. Ind., 113, pp. 190–197. 2. Ganesan, M., Guo, C., Ronen, A., and Malkin, S., 1996, “Analysis of Hydrodynamic Forces in Grinding,” Trans. NAMRI/SME, 24, pp. 105–110. 3. Hryniewicz, P., Szeri, A. Z., and Jahanmir, S., 2001, “Application of Lubrication Theory to Fluid Flow in Grinding: Part I—Flow Between Smooth Surfaces,” ASME J. Tribol., 123, pp. 94–100. 4. Patir, N., and Cheng, H. S., 1978, “An Average Flow Model for Determining Effects of Three-Dimensional Roughness on Partial Hydrodynamic Lubrication,” ASME J. Lubr. Technol., 100, pp. 12–17. 5. Elrod, H. G.
, 1979, “A General Theory for Laminar Lubrication with Reynolds Roughness,” ASME J. Lubr. Technol., 101, pp. 8–14.
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