基于异步旋转磁极的TC4薄板双面磁粒研磨工艺研究  

Process Study on Double-sided Magnetic Abrasive Finishing of TC4 Thin Plates Based on Asynchronous Rotation Magnetic Pole

作　　者：刘杰 焦安源 张家龙 苗永鑫 韩冰[1] LIU Jie;JIAO Anyuan;ZHANG Jialong;MIAO Yongxin;HAN Bing(School of Mechanical Engineering and Automation,University of Science and Technology Liaoning,Liaoning Anshan 114051,China;School of Applied Technology,University of Science and Technology Liaoning,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 [2]辽宁科技大学应用技术学院,辽宁鞍山114051

出　　处：《表面技术》2024年第10期196-206,共11页Surface Technology

基　　金：辽宁省教育厅项目(LJKZ0295);辽宁省自然科学基金(2019-ZD-0029)。

摘　　要：目的为提升传统磁粒研磨TC4薄板的加工效率,改善表面形貌,设计了相对磁极产生相对转速差的双面磁粒研磨装置。方法基于两侧相对磁极的异步旋转,使两侧磁极产生相对转速差,进行磁性磨粒的受力和运动分析,对材料去除量进行计算分析。利用Maxwell软件,对不同的相对转速差进行磁场的模拟仿真,进而使用设计的双面磁粒研磨加工装置,对TC4薄板的双面进行研磨。最后,使用粗糙度仪和超景深3D电子显微镜,对研磨前后的工件表面进行观察分析。结果对于磁极的同步旋转,即当两侧磁极转速为500 r/min时,正面表面粗糙度Ra的平均值从0.47μm下降至0.2μm,下降幅度为57%,反面表面粗糙度Ra的平均值从0.46μm下降至0.21μm,下降幅度为54%。对于磁极异步旋转,即磁极Ⅰ转速为500r/min、磁极Ⅱ转速为600 r/min时,正面表面粗糙度Ra的平均值从0.47μm下降至0.1μm,下降幅度为78%,反面表面粗糙度Ra的平均值从0.48μm下降至0.1μm,下降幅度为79%,正面最大高度差的平均值从62.5μm下降至10.4μm,下降幅度为83%,反面最大高度差的平均值从63.2μm下降至10.3μm,下降幅度为84%,材料去除效率最高,表面质量得到有效改善。结论采用异步旋转双面磁粒研磨的方式,可以有效促进磁性磨粒的翻滚运动,加速切削刃的更新。该装置加工时能够产生相对较高的磁感应强度,磁场梯度变化适中,有利于提升表面质量,修复工件表面的缺陷,大幅度提升了研磨的效率。In order to enhance the processing efficiency and improve the surface morphology of TC4 thin plates processed by conventional magnetic abrasive finishing(MAF),a double-sided MAF device that generated a relative rotation speed difference with respect to the magnetic pole was designed to enhance its surface quality.Based on the asynchronous rotation on two sides of the relative magnetic pole,the two sides of the magnetic pole produced different speeds,so that it produced a relative rotation speed difference.The involute arrangement of magnets were chosen from two sides of the magnetic pole for the study.First of all,the magnetic abrasive was subject to a force and motion analysis to find out the factors affecting the efficiency of the processing and the processing effect.Then,the calculation and analysis of the principle of the removal of materials from the single magnetic abrasive were conducted.Using Maxwell software,the magnetic field gradient and magnetic induction intensity during asynchronous rotation were analyzed,and the simulation of the magnetic field was compared with the simulation of different relative rotation speed differences to obtain the best simulation results.The authenticity and reliability of this test was verified by the designed double-sided MAF device and processing device using different simulation parameters to grind both sides of the TC4 thin plate.Finally,the surface of the workpiece before and after grinding was observed and analyzed with a roughness meter and an ultra-depth-of-field 3D electron microscope.When the poles rotated synchronously,that was,when both poles rotated at 500 r/min,the average surface roughness Ra on the front side decreased from 0.47μm to 0.2μm with a decrease of 57%,and the average surface roughness Ra on the back side decreased from 0.46μm to 0.21μm,with a decrease of 54%,the material removal efficiency was lower.While the average surface roughness Ra of the front side decreased from 0.47μm to 0.1μm with a decrease of 78%when the poles rotated asynchrono

关 键 词：钛合金 双面磁粒研磨 异步旋转 材料去除体积 相对转速差 

分 类 号：TG176[金属学及工艺—金属表面处理]