聚磁盘形状对磁粒研磨加工管件内表面的影响  

Influence of Shape of Aggregate Magnetic Iron Plate on Inner Surface of Pipe by Magnetic Abrasive Finishing

作　　者：李文龙 陈燕[1] 吕旖旎 程淼 赵杨 LI Wen-long;CHEN Yan;LYU Yi-ni;CHENG Miao;ZHAO Yang(School of Mechanical Engineering and 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：《表面技术》2020年第5期354-359,367,共7页Surface Technology

基　　金：国家自然科学基金(51775258);辽宁省自然科学基金重点项目(20170540458);精密与特种加工教育部重点实验室基金(B201703)。

摘　　要：目的提高磁粒研磨法加工管件内表面的质量及加工效率,探究磁粒研磨法中不同形状的聚磁盘对管件内表面的影响。方法利用Maxwell软件对轴向开槽聚磁盘与不开槽聚磁盘进行磁场强度模拟和磁感应线模拟,分析不同形状的聚磁盘的磁感应强度变化和磁场强度分布。利用磁粒研磨法对工件内表面进行研磨加工,对研磨之后的工件表面粗糙度进行测量,并对微观形貌进行观察。结果在磁粒研磨工具转速为500 r/min、加工时长为15 min的条件下,聚磁盘为未开槽时,表面粗糙度由原始的0.509μm降至0.127μm,表面粗糙度改善率(%ΔRa)为75.04%;当聚磁盘为轴向开槽时,工件表面粗糙度由原始的0.553μm降至0.097μm,工件的表面粗糙度改善率(%ΔRa)为82.45%。结论在相同的加工条件下,当聚磁盘轴向开槽时,相对于轴向不开槽的聚磁盘,磁粒研磨管件内表面的研磨效果更好,表面粗糙度改善率和研磨效率更高。The work aims to improve the grinding quality and efficiency of the inner surface of pipe by magnetic abrasive finishing by exploring the influence of different shapes of aggregate magnetic iron plates on the inner surface of the pipe. Firstly, maxwell software was used to simulate magnetic field intensity and magnetic induction line for axial grooved and non-grooved aggregate magnetic iron plates and analyze the magnetic induction intensity variation and magnetic field intensity distribution of different shapes of aggregate magnetic iron plates. Secondly, the inner surface of the workpiece was polished by magnetic abrasive finishing. Finally, the surface roughness of the workpiece after grinding was measured, and the microscopic morphology was observed. When the speed of magnetic abrasive finishing tool was 500 r/min and the processing time was 15 min, the aggregate magnetic iron plate was not slotted and surface roughness decreased from 0.509 μm to 0.127 μm, with a roughness improvement rate(%ΔRa) of 75.04%. When the aggregate magnetic iron plate was axially slotted, the surface roughness of the workpiece was reduced from 0.553 μm to 0.097 μm, with a roughness improvement rate(%ΔRa) of 82.45%. Under the same processing conditions, when the aggregate magnetic iron plate is axially slotted, the inner surface of the pipe is better polished than that by the non-grooved aggregate magnetic iron plate in the axial direction and the surface roughness improvement rate and the grinding efficiency are better.

关 键 词：磁粒研磨 聚磁盘 SS304不锈钢 微观形貌 表面粗糙度 

分 类 号：TG356.28[金属学及工艺—金属压力加工]