Application of lubrication theory to fluid flow in grinding: Part II - Influence of wheel and workpiece roughness

The objective of this study is to model fluid flow in grinding with nonporo us 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 flow's between rough surface s is verified experimentally in terms of the developed hydrodynamic pressur e, using a resin-bonded diamond grinding wheel. The experiments were perfor med under the spark-out condition (i.e., with the wheel just touching the w orkpiece) and in actual grinding. Agreement between theory and experiment i s shown Sol Re<100, but a significant discrepancy (most likely due to turbu lence is observed for 300<Re<1500.