Author:

Keywords:

ELID-grinding, cermets

Abstract:

Electrolytic in-process dressing (ELID-)grinding can keep cast-iron bonded (CIB) wheels sharp for long grinding cycles to avoid glazing effects and especially in case of even harder materials. This paper describes the latest results of research on ELID-grinding of a cermet. In the roughing step, ELID-grinding and conventional grinding with 46µm diamond grits CIB wheels are preferable to resin-onded grinding which is characterized by low G-ratios. With ELID stable grinding can be achieved without the need for dressing operations. The maximal material removal rate (MRR) in ‘ELID-roughing’ on the used surface grinder is measured to be 1 mm³/s. A thorough parameter analysis is more important during ‘ELID-finishing’ because this step is prone to chattering. To avoid these effects it is advisable to limit the normal force by lowering the axial feed and by maximizing the duty ratio of the ELID power supply.