The grindability of stainless steel using ULID (ultrasonic in-process dressing) method

摘要

Because of the high toughness and low thermal conductivity, stainless steel is very difficult material to machine. It is also reported that the chemical interaction between stainless steel workpiece and alumina wheel causes the poor grindability. From these reasons, grinding time is larger and form accuracy is worse when the material ground with alumina wheel. By applying CBN or diamond wheel, the cutting depth can be increased and the dressing interval can be expanded. However, the impurities at grinding can easily get attached to the wheel surface and caused clogging phenomena. In this study, the Ultrasonic In-Process Dressing (ULID) method was suggested to prevent the clogging phenomena of the wheel surface and decrease the wheel wear. Finally, it can be found that the surface roughness with the ULID method is better than that without it. The change of residual stress and wheel wear is small with the use of ULID. The ULID is also effective to prevent clogging of wheel by removing the impurities among the grains.