数字化磁粒光整加工技术的数值模拟

The Numerical Simulation for the Digital Magnetic Abrasive of Super-finishing T echnology

利用有限元的方法模拟了磁极不同开槽方式和开槽尺寸对磁粒研磨加工工艺的影响 ,得到了磁极表面在开不同形状型槽的情况下 ,加工区域中的磁位分布、磁场强度分布以及磁粒和工件表面的受力分布。结果表明 ,在磁极表面开矩形槽 ,而且型槽的齿与槽的宽度之比为 1∶1时 ,比磁极表面不开槽、开V型槽、漏斗型槽以及其它尺寸的矩形槽更有利于提高加工的效率和加工的质量。同时对模拟的结果进行了实验验证 ,实验结果和模拟的结果非常吻合。

In order to determine the influence of the shap e of magnetic pole on ma gnetic abrasive finishing(MAF),a numerical simulation program has been developed by the finite element method(FEM).The simulation results were expressed as the distribution of magnetic potential,the distribution of magnetic field strength a nd the distribution of action forces on the magnetic abrasive and on the surface of workpiece within the machining field with different grooves shape and sizes. The results indicate that cutting rectangular groove on magnetic pole surface wi th the groove and tooth width ratio of 1∶1 could increase the machining efficie ncy and quality in comparison with smooth surface,“V”groove,infundibular groov e and rectangular grooves with different width ratio.Experiments were also conduct ed for validation the simulation results,and the experimental results fitted ver y well with the simulation results.