液体磁性磨具小孔光整加工的机理分析及实验研究

The Mechanism Analysis and Experiments of the Smaller Hole Finishing of Liquid-magnetic Abrasive Tool

针对发动机上喷油孔、高压油管等小孔内壁光整加工困难的问题,设计了一种适用于小孔内壁光整加工的新装置。阐述了液体磁性磨具对小孔内壁光整加工的机理,在此基础上分析了影响材料去除率的因素,并且通过实验验证了入口压力、外加电流强度(即磁场强度)、加工时间等因素对加工效率以及加工后小孔内壁最终表面粗糙度的影响,从而得出了优化的小孔内圆表面光整加工参数,对实施其他小孔内圆表面的光整加工有一定的指导和借鉴作用。

Contraposing the difficulty of finishing inner wall of smaller hole such as spit hole and fuel injection pipe on engine, a new equipment for finishing inner wall of smaller hole is designed, elaborating the mechanism of fin- ishing inner wall of smaller hole. On the basis of analyzing the Influencing factors of material removing rate. And through the experiment verifying the factors of inlet pressure, impressed current intensity （ magnetic field intensity） and processing time that influenced the processing efficiency and the final surface roughness of finished smaller hole.The optimal parameters of finishing the smaller hole was summarized, which can be used as a tentative refer- ence in finishing other smaller hole.