Investigation of the heat partitioning in high efficiency deep grinding

The grinding heat partitioning in the high efficiency deep grinding (HEDG) process has been investigated. The ratios of heat partition to the different heat sinks, i.e. workpiece, chips, fluid and grits, have been calculated, based on both theoretical analysis and experimental data. The heat partitioning ratio to the grinding chips increases with the material removal rate and takes most of the grinding heat away from the grinding zone under HEDG conditions where very high material removal rates apply. The heat partition to workpiece decreases when increasing the material removal rate. Cooling fluid is especially important for the conditions of creep feed grinding when using low feed rates, with over 90% of heat convected away by the grinding fluid. Under HEDG conditions, only 5-10% of the grinding heat is taken away by the grinding fluid. Very high material removal rates can be achieved with good surface integrity, when using an optimised selection of process parameters. (C) 2003 Elsevier Ltd. All rights reserved.