Magnetic characteristics and experimental investigations of eccentric magnetic honing for thick-walled, small-aperture stainless steel pipes

• Published in: Precision engineering Vol. 94; pp. 700 - 724
• Main Authors: Yan, Zhao-kun, Li, Yong-gang, Yang, Sheng-qiang, Li, Xiu-hong, Yao, Xin-gai, Liu, Tong-yi, Tong, Zhe
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.06.2025
• Subjects: Eccentric magnetic honing technology; Equivalent magnetic charge method; Finishing; Magnetic force; Monte Carlo; Torque; Eccentric magnetic honing technology; Equivalent magnetic charge method; Magnetic force; Torque; Monte Carlo; Finishing
• ISSN: 0141-6359
• DOI: 10.1016/j.precisioneng.2025.03.021

To tackle the polishing challenges posed by the inner surface of thick-walled, small-aperture stainless steel pipe, the concept of eccentric magnetic honing technology is proposed. The force and motion of the process are realized by the attraction of the outer magnetic pole to a pair of permanent magnets inside the magnetic tool. In order to obtain the magnetic force and torque information of the permanent magnet inside the magnetic tool quickly and accurately, the equivalent magnetic charge method is used to establish the numerical model, and the magnetic force and torque expressions of the outer magnetic pole in translational and rotational motion modes are further derived. On this basis, the finite element model is established and the numerical model for validation. The results show that the modified equivalent magnetic charge model can predict the magnetic force quickly and accurately. Then, the influence of the outer magnetic pole size on the magnetic force and torque is studied, and the influence on the driving point is further explored by combining the kinematic equation. Finally, the preliminary process experiments show that the process can complete the polishing of thick-walled, small-aperture stainless steel inner surfaces. •This study puts forward a new technology of eccentric magnetic honing.•The equivalent magnetic charge method is used to model the magnetic force and magnetic torque of grinding tools.•The influence of the outer magnetic pole size parameters on the magnetic force, torque and driving point is analyzed.•Verified that the use of the best size of the external magnetic pole can be more efficient polishing of the inner surface.