Nano-level surface generation on H13 alloy steel by ultra-precision grindingwith electrolytic in-process dressing

摘要

The aim of this work was to achieve the surface finish of 10nm on a 40mmdiameter disc of chrome-molybdenum-vanadium alloyed steel (H13) by usingprecision grinding process with electrolytic in-process dressing. The machinetool utilized was Tetraform-C, its unique tetrahedral frame offered higherstructural stability. A cup grinding wheel with iron bonded CBN abrasive grit of76 microns average size with 50% concentration was used. The statistical methodswere employed to determine the optimal combination of input parameters toachieve the required response. The main effect of feed rate was found to be moresignificant than the depth of cut and lower levels of these factors producedbetter surface finish. The developed regression model based on the relationshipsbetween process variables was used to predict factor levels to achieve therequired process response.