During dressing with diamond tools, the active mechanisms are grit breakage and splintering, bonding breakage, grit break-out of the bonding, and grit deformation [MARI04, WIMM95, MINK88, MESS83, KLOC08b]. For vitrified bonded wheels, dressing forces seem to have a crucial effect on the disruption of the abrasive layer and therefore on the wear behavior after dressing [LINK07].
£inar [CINA95] developed a grit collision model to describe mechanisms in cup dressing and predict workpiece surface roughness. Linke [LINK07] extended the model to other dressing tool types and combined it with a dressing force model.
The initial grinding wheel wear after dressing can be high, before the wheel wear gets into a steady state that is defined by the grinding process conditions only (see Sect. 6.3.2 “Micro Effect—Sharpness Loss”). In industrial practice, the grinding wheel wear often is compensated with a few dressing strokes with a high depth of
dressing cut followed by a last stroke with a smaller depth of dressing cut to reduce the grinding wheel surface roughness. However, grinding wheel scratch tests verified that a higher depth of dressing cut and a smaller dressing overlap ratio disrupt the abrasive layer [LINK07, KLOC08b]. In a dressing process with several dressing strokes, the grinding wheel surface roughness is determined by the last dressing stroke. However, the grinding wheel structure is damaged also by the previous strokes. This will result in an instationary grinding process after dressing depending on all previous dressing conditions.