Optimization experiment of permanent magnetic pole in magnetic grinding assisted by alternating magnetic field
Titanium alloy is an emerging structural and functional material,and precision machining of TC4 titanium alloy surface remains a challenge.To improve the surface quality of titanium alloy,the arrangement of permanent magnetic poles is further optimized in alternating magnetic field magnetic particle grinding.The unoptimized alternating magnetic field and the optimized alternating magnetic field were simulated and analyzed by finite element software.The changes of surface morphology and surface roughness of TC4 titanium alloy processed by magnetic particle lapping under several alternat-ing magnetic fields before and after optimization were compared through experiments.The results show that after 10 min of magnetic grain grinding,the surface roughness of the workpiece is reduced from 1.28 μm to 0.38 μm without optimizing the alternating magnetic field,and the surface roughness of the workpiece decreases from 1.28 μm to 0.13 μm during the magnetic particle grinding process under the optimized alternating magnetic field with the highest magnetic field strength.The optimized alternating magnetic field has increased the magnetic induction intensity within the processing area during assisted magnetic abrasive machining.During the grinding process with the optimized alternating magnetic field,the trajectory of magnetic abrasive particles becomes more complex,facilitating the renewal of magnetic abrasive particles.This results in a smoother surface morphology of the workpiece after processing.The optimized alternating magnetic field-assisted magnetic abrasive machining on the surface of TC4 titanium alloy increased the grinding efficiency and further improved the surface quality of the workpiece.
alternating magnetic fieldmagnetic particle grindingTC4 titanium alloy platesurface roughness
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