有色设备

Magnetic abrasive finishing is an advanced machining technology suitable for precision machining of surfaces of various geometric shapes of workpieces. It has the advantages of residual stress dispersion, good machining uniformity, and high degree of automation. After processing, the surface roughness of the workpiece can meet the requirements for the use of ultra precision parts. The article introduces the processing principle of magnetic abrasive finishing, and summarizes the research progress of magnetic abrasive finishing processing technology from five aspects, including abrasive preparation, shape and arrangement of magnetic poles, simulation, as well as material removal models and roughness models under different processing techniques and workpiece shapes.The mathematical model in magnetic abrasive finishing was emphasized, and the key steps for establishing a material removal model were summarized.The results show that selecting magnetic abrasives with different grinding phases according to materials of varying hardness can better achieve precision machining of workpieces. Simulation analysis of magnetic field, abrasive motion trajectory, and multi-field coupling can predict the force magnitude, thermo-mechanical coupling, wear condition, and temperature change of the workpiece during machining. The shape of the magnetic poles (tile shape, square shape, saddle shape, etc.), the arrangement of magnetic poles (N-N, N-S, N-S-N, Halbach array, etc.), and the dynamic magnetic field (alternating magnetic field, pulsed magnetic field, etc.) determine the force magnitude and motion of the abrasives. Material removal models and roughness models can accurately analyze the impact of process parameters on machining results, facilitating the setting of more appropriate experimental parameters.The advantages and disadvantages of the algorithm model and mathematical model in the roughness model are analyzed. Finally, the shortcomings and deficiencies in current research are summarized, and suggestions for future research directions of magnetic abrasive finishing technology are proposed.