| Hole surface quality has great influence on assembly accuracy and service life of parts. Burr can be removed and surface roughness degree value can generally decrease 1-2 level by rotating magnetic field magnetic abrasive finishing and swirling flow finishing combined with magnetic field. Burr can be removed and surface roughness degree value can generally decrease 2-3 level after rotating magnetic field viscoelastic magnetic abrasives finishing, surface contour bearing ratio improves, surface texture tends to isotropy, thus service performance and life of parts are greatly improved. New surface finishing technology based on magnetic field characteristics is suitable for finishing slender hole, profiled hole and blind hole. It has important research value and application prospect due to its strong shape adaptability, simple equipment, high efficiency and good effects but also energy saving, environmental protection and clean.New surface finishing technology based on magnetic field characteristics is advanced according to existing problem of hole finishing. Detailed theory analysis and experimental study are done aiming at rotating magnetic field magnetic abrasive finishing, rotating magnetic field viscoelastic magnetic abrasives finishing and swirling flow finishing combined with magnetic field. Main research contents are as follows:1. Rotaing magnetic field surface finishing is advanced. Force and trajectory of abrasive in magnetic field and finishing mechanism is analyzed. Microscopic removal model is established. Main factors influencing finishing effects and finishing efficiency are acquired and influence rules are determined. So rotaing magnetic field surface finishing is feasible according to theory analysis.2. Magnetic field generator of roating magnetic finishing is researched and developed based on numerical simulation of magnetic pole arrangement form, shape and quantity, which can provide theoretical basis for further experimental study.3. Preparation process of spherical magnetic abrasives suitable for rotating magnetic finishing is determined. Experimental study on all kinds of parameters influencing on finishing effects and efficiency has been done and parameters are optimized. Finishing effects of rotating magnetic field magnetic abrasive finishing is defined.4. Rotating magnetic field viscoelastic magnetic abrasives finishing is advanced. Viscoelastic magnetic abrasives are made and its characteristic is further studied. Finishing mechanism, force and motion of viscoelastic magnetic abrasives, and main factors influencing finishing effects are researched.5. Finishing effects of rotating magnetic field viscoelastic magnetic abrasives finishing and main influence factors are defined by experimental study. Burr can be removed and edge rounded after finishing profiled surface such as keyway and blind hole. Finishing effect is very obvious.6. Swirling flow finishing combined with magnetic field is advanced to solve axial finishing nonuniformity of swirling flow finishing for hole surface. Finishing effects is defined by theoretical analysis, numerical simulation and experimental study.In this dissertation, finishing mechanism of all kinds of new finishing technolgy based on magnetic field characteristics, microscopic model and theoretical analysis method are studied thoroughly and systematically. Detailed theoty analysis and experimental study are done aiming at rotating magnetic field magnetic abrasive finishing, rotating magnetic field viscoelastic magnetic abrasives finishing and swirling flow finishing combined with magnetic field. Research results show that the application of rotating magnetic field in finishing is feasible. New surface finishing technology based on magnetic field characteristics is suitable for finishing slender hole, profiled hole and blind hole and has important meaning for the further study, development and practical application of new surface finishing technology.
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