Design and simulation of magnetorheological polishing excitation device based on permanent magnet

Abstract

Excitation device is the core component of magnetorheological polishing equipment. whether it can generate a stable and uniform high gradient magnetic field is the key factor determining the success of magnetorheological polishing. The excitation device for the magnetorheological polishing wheel was designed using a sector permanent magnet. Various aspects of the excitation device, including the number of permanent magnets, magnetization modes, arrangement modes, and air gap widths, were simulated and analyzed using ANSYS Electronics Desktop and other softwares. The magnetic induction lines and magnetic induction intensity distribution under different working conditions were obtained. The results show that when the air gap width is 4 mm, the magnetic induction intensity produced by the axial magnetization of a single permanent magnet is the lhighest, reaching 358.4 mT. Theoretically, a polishing ribbon with a width of 26 mm and a height of 6.0 mm can be formed on the surface of the polishing wheel.

Keywords

• permanent magnets
• magnetorheological polishing
• excitation device
• magnetic field