Thermal Analysis of Ball End Magnetorheological Finishing Process

Abstract

Thermal analysis on ball end magnetorheological finishing tool has been done to find the tool tip temperature at various magnetizing currents. The magnetorheological polishing fluid is used as a finishing medium and it retained strongly at the tool tip surface during the finishing operation under the influence of magnetic field. The viscosity of magnetorheological polishing fluid starts decreasing as temperature increases above 50ºC. The performance of the finishing process also start decreasing as bonding strength of magnetorheological fluid decreases above the temperature of 50ºC to finish the work surfaces. Therefore thermal analysis has been done to know the tool tip surface temperature at various heating conditions with magnetizing currents.The thermal analysis has been done at the magnetizing currents 1 to 7A theoretically and practically at 1 to 4A. It has been determined that the tip temperature approximately same calculated by theoretically and practically. During thermal analysis the tip temperature goes above 50ºC by passing current, By maintaining the coolant temperature it has been found that the temperature at the tip goes below 50ºC.