The Effect of Operating Parameters of MAF Process on the Surface Roughness for Ferromagnetic Materials

Saheb M. Hameed

Saheb M. Hameed Material Department, College of Engineering, University of Kufa, Najaf / Iraq.

Keywords: Response surface methodology (RSM), Surface roughness, MINITAB software, Ferromagnetic, Magnetic abrasive finishing (MAF)

Abstract

Magnetic abrasive finishing (MAF) process, Taguchi design of experiments (DOE) is applied to find response parameters effecting the surface layer quality by using change in surface roughness generated. Important operating parameters effecting the surface layer quality generated during the MAF are identified as: (1) finishing time, (2) dose (volume of powder), (3) current (DC) applied to the electromagnet and (4) feed rate. Using response surface methodology(RSM) the predicated mathematical model, Experimental results show that for a change in surface roughness (ΔRa), feed rate and finishing time are found to be the most significant parameters followed by dose(volume of powder) and then current. Experiments are carried out with ferromagnetic (work piece) stainless steel 420 plate. The model sufficiency is very satisfactory as the Coefficient of Determination (R²) is found to be 98.80% and adjusted R²-statistic (R²adj ) 97.60%.