Study on the estimation of wheel state in electrolytic in-process dressing (ELID) grinding

To successfully establish the ELID-grinding, it is important to properly select the electrolytic condition according to grinding conditions. Currently, the selection of electrolytic condition is mainly dependent on the operator´s experience, which is one of difficulties in preventing the successful application of ELID techniques. In this study, an in-process measurement system of the insulating layer using two gap sensors-a capacitor type and an eddy current type are developed and the change of the thickness of insulating layer during ELID grinding is detected. Evaluation experiments show the possibility to control the electrolytic condition through in-process measurement of the layer status