磁力研磨法对整体叶盘的抛光工艺研究

Study on Blisk Surface Polishing by Magnetic Abrasive Finishing

针对航空发动机所用整体叶盘经五轴数控铣削后所产生的加工纹理难以去除的问题,提出利用磁力研磨柔性加工的特性——磁性磨料在磁力的作用下形成磁粒刷仿形压附在工件表面,从而实现研磨抛光整体叶盘的目的。通过对磁力研磨加工整体叶盘的研磨原理及磁性研磨粒子的受力情况进行详细分析,得出整体叶盘经磁力研磨加工后原有的铣削加工纹理被有效去除,表面粗糙度由研磨前的0.82μm降低至0.25μm,验证了磁力研磨工艺对整体叶盘具有良好的研磨抛光效果。

For the issue that machining texture removal on blisk of aeroengine after the milling process by five-axis CNC is difficult, flexible machining of magnetic abrasive is proposed. Magnetic brush is formed from magnetic abrasive under the action of magnetic force and attached to the workpiece surface, so can realize the grinding and polishing to the blisk. By analyzing the principle of magnetic abrasive machining and the force of the abrasive particles carried in detail, it concludes that the milling texture on blisk is removed obviously after magnetic abrasive machining. The surface roughness value of the leaf is reduced from 0.82μm to 0.25μm. It verifies that the magnetic abrasive has excellent polishing results to the leaf of the blisk.