管件内壁磁粒研磨时的磨粒动力学行为仿真及分析  

Simulation and analysis of abrasive particles dynamics behavior during magnetic particles grinding on inner wall of pipe fitting

作　　者：吴传宗 马小刚[1] 张亮[2] 杨诗瑞 解志文 陈燕[1] 丁云龙 WU Chuanzong;MA Xiaogang;ZHANG Liang;YANG Shirui;XIE Zhiwen;CHEN Yan;DING Yunlong(School of Mechanical Engineering and Automation,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China;Sheet welding center,Beijing Power Machinery Research Institute,Beijing 100074,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]北京动力机械研究所,钣焊中心,北京100074

出　　处：《金刚石与磨料磨具工程》2024年第2期244-251,共8页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(51775258);辽宁省科技厅重点研发计划(2023JH2/101300226)。

摘　　要：为探究磁性磨粒在管件研磨过程中的动力学行为,对其研磨过程进行离散元仿真,并分析其运动轨迹和磨削力随管件转速和加工间隙的变化;通过单磨粒球运动及磁粒研磨试验,验证磁场力模型的准确性与粒子运动学行为可视化的可行性。结果表明:随管件转速提高,磁性磨粒在离心力作用下向加工区域外运动,且加工间隙越大越容易被“甩飞”;在达到临界转速之前,随管件转速提高,磨削力减小,材料去除效率提升。当管件转速由400 r/min提高至临界转速,加工间隙为2 mm和4 mm时,磨削力分别下降5.4μN和2.3μN,材料去除效率明显提升;当加工间隙为6 mm时,磨削力变化较小,且当转速大于临界转速650 r/min时,材料去除效率下降。同时,材料去除量在达到临界转速之前随管件转速提高而增大,但加工间隙的增大会使临界转速降低;且材料去除量的变化趋势与仿真结果一致,验证了仿真分析的可靠性。To explore the dynamic behavior of magnetic abrasive particles in the grinding process of pipe fittings,the grinding process of magnetic abrasive particles was simulated using discrete elements.The changes in motion trajectory and grinding force with the speed of pipe fittings and the processing gap were analyzed.Single abrasive particle ball motion and magnetic particle grinding test were conducted to verify the accuracy of the magnetic field force model and the feasibility of visualizing the particle kinematic behavior.The results show that as the speed of the pipe fittings increases,the magnetic abrasive particles move outside the processing area due to centrifugal force,and the larger the processing gap,the easier they are"thrown away".Before reaching the critical rotation speed,the grinding force decreases,and material removal efficiency increases with the increase in pipe rotation speed.When the pipe rotation speed increases from 400 r/min to the critical rotation speed and the machining gaps are 2 mm and 4 mm,the grinding forces decrease by 5.4μN and 2.3μN respectively,leading to a significant improvement in material removal efficiency.However,with a machining gap of 6 mm,the grinding force changes little,and when the rotation speed exceeds the critical rotation speed of 650 r/min,material removal efficiency decreases.Additionally,the material removal amount increases with the increase in pipe rotation speed before reaching the critical rotation speed,but increasing the processing gap reduces the critical rotation speed.The change in material removal amount aligns with the simulation results,validating the reliability of the simulation analysis.

关 键 词：磁性磨粒 动力学特性 离散元法 磨削力 材料去除效率 

分 类 号：TG58[金属学及工艺—金属切削加工及机床] TG73[化学工程—硅酸盐工业] TQ176