Abstract
Usually, the most of evalution about surface roughness are carried out in form of two dimensions. But in the case of removal machining based on discharging in liquid, the process of machining is effected considerably by uncertain factors between two electrodes, it is difficult that surface roughness is exactly measured by the statistical method because the shapes of surface are complicated and various.
In this report, tracer method based on two dimensions is improved and software is supplemented, the removal crater by single discharging and surface roughness by repeated discharging are measured and evaluated in the form of three dimensions. As the result, the greatest real values of removed part and rised part of removal crator and surface roughness are measured. Moreover, the volume, the holding area of the volume and the weight of removed part and rised part of crator are evaluated and measured with that relation of numerical value between two dimensions and three dimensions are made clear.
