基于交变磁场辅助磁力研磨中永磁极优化试验  

Optimization experiment of permanent magnetic pole in magnetic grinding assisted by alternating magnetic field

作　　者：李佳新 曹睿 矫彦婷 韩冰[1] 王荟江 Li Jiaxin;Cao Rui;Jiao Yanting;Han Bing;Wang Huijiang(School of Mechanical Engineering&Automation,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学机械工程与自动化学院,辽宁鞍山114051

出　　处：《电镀与精饰》2024年第5期28-35,共8页Plating & Finishing

摘　　要：钛合金是新兴的结构和功能材料,TC4钛合金表面的精密加工依旧是个难题。为提高钛合金表面质量,在交变磁场磁粒研磨加工中进一步优化了永磁极的排列方式。利用有限元软件分别对未优化的交变磁场以及优化后的交变磁场进行模拟分析对比,再通过试验对比优化前后的几个交变磁场下,磁粒研磨加工TC4钛合金的表面形貌和表面粗糙度的变化情况。研究表明:在未优化交变磁场下磁粒研磨加工10 min,磁粒研磨加工工件的表面粗糙度从1.28μm降至0.38μm;在优化后磁场强度最大的交变磁场作用下,磁粒研磨加工工件的表面粗糙度从1.28μm降至0.13μm。在辅助磁粒研磨过程中,优化后的交变磁场不仅提高了加工区域内的磁感应强度,而且磁性磨粒研磨轨迹更加复杂,促进了磁性磨粒的更新,使加工后工件的表面形貌更加平整。用优化后的交变磁场辅助磁粒研磨TC4钛合金表面,提高了研磨效率,进一步提高了工件的表面质量。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 alternating 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.

关 键 词：交变磁场 磁粒研磨 TC4钛合金板 表面粗糙度 

分 类 号：TG147[一般工业技术—材料科学与工程]