磁粒研磨Al 2024细长管的机理及试验研究  

Mechanism and Experimental Study of Al 2024 Slender Tube by Magnetic Particle Grinding

作　　者：张龙龙 焦安源[1] 陈燕[1] 钱之坤 ZHANG Long-long;JIAO An-yuan;CHEN Yan;QIAN Zhi-kun(University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学,辽宁鞍山114051

出　　处：《表面技术》2018年第9期303-309,共7页Surface Technology

基　　金：国家自然科学基金(51775258);辽宁省教育厅基金项目(2016HZPY10)。

摘　　要：目的探究磁粒研磨过程中外部磁极的不同排布方式对Al 2024细长管内表面研磨质量的影响,寻求一种最佳的磁极排布方式。方法首先,在理论上分析了磁粒研磨细长管的基本原理;其次,利用ANSYS软件的磁场模块对磁极的三种排布方式进行模拟,得出不同的磁感应强度曲线,通过分析曲线的变化规律来探讨磁极排布方式对研磨效果的影响;再次,设计了试验装置,对理论和有限元仿真结果进行了验证试验,通过观测内表面粗糙度值和微观形貌,对比了试验效果。结果随着磁极夹角从90?增大到180?,磁感应强度逐渐减小,有效磁场区域逐渐减小。较小的磁感应强度使得磁性磨粒在磁场中受到的研磨压力变小,磁性磨粒易于受离心力作用甩出加工区域,参与研磨的数量变少,研磨质量降低;变小的有效磁场区域使得磁性磨粒受力区域减小,被磁化的数量减少,参与研磨的数量减少,研磨质量较差。研磨时间10 min后,从试验结果中可以看出,当磁极90?分布时,表面粗糙度值下降最大,从原来的0.66μm降至0.12μm,表面的凹坑和纹理缺陷被去除,表面形貌均匀且光泽度较好。结论磁粒研磨Al 2024细长管内表面时,调整磁极排布可以提高加工区域的磁感应强度和增大有效磁场区域面积,继而提高磁性磨粒的作用效果,促进研磨的有效进行,保证较好的研磨质量。The work aims to investigate the effects of different magnetic pole arrangement ways of external magnetic poles on grinding quality of internal surface on A1 2024 slender tube during magnetic particle grinding,so as to seek the best way of magnetic pole arrangement.Firstly,basic principle of magnetic particle grinding for slender tube was analyzed theoretically;secondly,magnetic field module of ANSYS software was used to simulate three magnetic pole arrangement ways and obtain different magnetic induction intensity curves.The influences of magnetic pole arrangement ways on grinding effect were investigated by analyzing variation of the curves;thirdly,experimental device was designed,and verification test was applied to the theory and finite element simulation results.The test results were compared by observing roughness and micromorphology of the internal surface.As the angle between the magnetic poles increases from 90o to 180.,the magnetic induction intensity decreased and effective magnetic field areas decreased gradually;the magnetic induction intensity was smaller,so grinding pressure sustained by magnetic particles in magnetic field was smaller,magnetic particles were easily flung out of processing area under the action of centrifugal force.The number of magnetic particles involved in grinding was decreased and grinding quality was reduced.Under the effects of smaller effective magnetic field area,stressed area of magnetic particles was decreased,quantity of magnetized particles was reduced,number of magnetic particles involved in grinding was reduced,and grinding quality was degraded.While the magnetic pole was arranged at the angle of 90°,the result of 10 min grinding test showed that surface roughness decreased most sharply from the original Ra 0.66 um to Ra0.12 um,surface pits and texture defects were removed,surface morphology was uniform,and glossiness was better.During magnetic particle grinding of internal surface on A1 2024 slender tube,adjusting magnetic pole arrangement can improve magnetic indu

关 键 词：磁粒研磨 A12024细长管 磁极排布 表面粗糙度 表面纹理 

分 类 号：TG176[金属学及工艺—金属表面处理]