Research On Magnetorheological Finishing Technology Based On Rotating Magnetic Field

With the development of China’s manufacturing industry,intelligent manufacturing,industrial automation,aerospace,national defense science and technology and other hightech fields have increasingly high requirements for parts.In the above industries,some cavity type parts will be involved.During the processing of these parts,it is inevitable that some burr will be generated on the surface of the inner cavity of the inner hole,and the removal is difficult and the efficiency is low The safety and performance of the equipment pose a great threat.Therefore,the research on the surface finishing technology of the inner hole is a subject worthy of long-term research in the manufacturing industry.The purpose of this project is to finish the surface of inner hole and inner cavity parts,so a new finishing technology is proposed: Magnetorheological Finishing Technology Based on rotating magnetic field.Firstly,this paper summarizes the principle of magnetorheological finishing,and selects the way of using permanent magnet rotation as the rotating magnetic field through analysis,so as to systematically design the experimental device of magnetorheological finishing,and uses COMSOL to simulate the distribution of magnetic field,and obtains the optimal magnetic pole distribution scheme.Secondly,the function of MRF in this study and the material removal mechanism of finishing are analyzed.The fluid characteristics of MRF slurry are tested and analyzed.Based on this,the mathematical model of MRF polishing fluid is established,and the effect of "fluid scouring" model on burr removal is analyzed by COMSOL.Finally,the workpiece was processed with the experimental device,and the finishing effects of different magnetic field rotation speed,abrasive proportion and processing time were obtained.The burr removal and surface roughness improvement of the workpiece surface were realized,and the burr removal of the inner hole workpiece was realized,which indicated that the machining method was feasible for the inner hole finishing of the workpiece.It has a certain guiding effect on the finishing of inner hole and inner cavity workpiece.