Prediction of Material Removal Depth Distribution Using Modified Preston's Equation in MCF Polishing by Applying Magnetic and Electrical Fields

The polishing utilizing MCF as a processing fluid (MCF polishing), in which abrasive grains are dispersed in the magnetic compound fluid (MCF), can polish like a mirror surface in a short time. If the material removal depth distribution can be predicted by any arithmetic method of the polishing process under the application of magnetic and electric fields, the optimal movement of the polishing tool can be predicted beforehand for convenience. In this study, our proposing modified Preston's equation was used to predict the removal depth distribution polished by a permanent magnet tool. The theoretical equation of the processing pressure based on the magnetic field was used to evaluate the magnetic force of the MCF. On the other hand, the theoretical equation based on the Gauss's law was also used for the processing pressure based on the electric field. The calculated profile curves were compared with the experimental results so that we demonstrated the validity of the modified Preston's equation and the equations of the processing pressure based on magnetic and electric fields.