2D and 3D surface roughness parameters of surfaces machined by EDM

Abstract

In electro discharge machining (EDM or spark erosion) the roughness of the machined surface plays a very important role in the applicability of the process. The EDM machined surfaces are near isotropic, so the 3D measured surface roughness parameters can be compared to the parameters measured by 2D method. This paper reports on the results of research on the comparison of 2D and 3D surface roughness parameters of EDM machined surfaces of tool steels. Based on the results of the performed cutting experiments and the subsequent measurements, conclusions will be drawn regarding the connection between the 2D and 3D surface parameters and the extent of roughness of steel surfaces machined by two type electrode material.