Magnetorheological finishing of a small-bore complex component of irregular shape using a small ball-end permanent-magnet polishing head

摘要

In order to achieve the nanofinishing of a ψ-shaped small-bore complex component with concave surfaces of a curvature radius less than 3 mm, a novel magnetorheological finishing (MRF)process using a small ball-end permanent-magnet polishing head is proposed, and a four-axes linkage dedicated MRF machine tool is fabricated.The processing method of the complex component is introduced.Magnetostatic simulation during the entire finishing path is carried out to analyze the material removal characteristics.A typical ψ-shaped small-bore complex component is polished on the developed device and fine surface quality is obtained with surface roughness Ra 0.0107 μm and surface accuracy of the finished spherical surfaces 0.3320 μm (PV).It indicates that the proposed MRF process can perform the nanofinishing of a kind of small-bore complex component with small curvature radius concave surfaces.