Description
The performance of grinding tools in grinding processes and the resulting surface and subsurface properties depend on various factors. The condition of the grinding tool after dressing is one of these factors. However, the infuence of the dressing process on the condition of the grinding tool depends on the selected process parameters and is difcult to predict. Therefore, this paper presents an approach to describe the infuence of the dressing process on tool wear of toric grinding pins and the resulting subsurface modifcation. For this purpose, toric grinding pins with a vitrifed bond were dressed with two diferent strategies and the wear and operational behavior were investigated when grinding AISI M3:2 tool steel with two diferent grinding strategies. In general, the investigations have shown that the dressing process infuences the performance and wear behavior diferently depending on the grinding strategy used. The degree of clogging is infuenced by the geometric contact sizes. In the case of small engagement cross sections with simultaneously large contact lengths the thermal tool load is distributed over a small annular area of the tool and favors clogging. Crushing and additional transverse loading of the grains result in an almost clog-free tool surface. This also leads to a lower G-ratio. Crushing leads to an intensifed decrease of the torus radii. The infuence of the dressing strategy can also be observed in the induced residual stresses. Toric grinding pins dressed by crushing induce lower compressive residual stresses into the workpiece, which can be attributed to the self-sharpening efect. This efect reduces the mechanical and thermomechanical load of the workpiece during machining.
