磁感应游离磨粒线锯切割中磁系研究

Study of magnetic system in magnetic induction free abrasive wire sawing

根据磁感应游离磨粒线锯切割技术要求,设计了能在锯丝周围产生辅助匀强磁场的磁系.利用ANSYS有限元软件,分别建立了磁系的磁轭、磁极接头的有限元仿真模型,仿真确定了磁轭的截面尺寸和磁极接头形状.根据磁轭、磁极接头仿真结果并依据磁路设计原理组建磁系,对置于磁系中的锯丝周围的高梯度磁场特性进行了仿真研究,结果表明:所设计的磁系产生了匀强磁场并具有一定的聚磁效果;锯丝在所设计的磁系中能够形成高梯度磁场并按规律分布.搭建磨粒吸附观测实验平台,观测磁性磨粒在锯丝表面的吸附,实验结果表明:磁性磨粒吸附于锯丝表面,所设计的磁系能够产生良好的磨粒吸附效果.

According to the technical requirements of magnetic induction free abrasive wire sawing, the magnetic system that can produce assisted uniform magnetic field around the saw was designed. The models of magnetic system＇s magnetic yoke and pole joint were built with ANSYS finite element analysis software, the section size of the magnetic yoke and shape of magnetic pole joint were set by simulation, the magnetic system were built according to the simulation results of the magnetic yoke,pole joint and the magnetic loop design principle. The magnetic characteristics of the wire placed centrally in the magnetic system were simulated. It is found that the designed magnetic system can produce an uniform magnetic field with a certain effect of flux concentration. Furthermore the wire in the designed magnetic system can form a high gradient magnetic field, which distributes regularly. The results verify that the designed magnetic system can produce good abrasive particle adsorption effect, when the magnetic abrasive grains are absorbed to the surface of the wire.