Abstract: Appropriate process parameters are crucial to improve processing quality and efficiency when finishing hole by fluid magnetic abrasives.Since the limitation of processing mechanism,it is difficult to optimize the process parameters.It is even more difficult when there are several technical indexes.Using orthogonal experiment gets the reasonable parameters when there is only one index.Using grey correlation analysis solves the optimization of the process parameters when there are several indexes.The study found the best quality can be get when the current is with an intensity of 3A,the time is lasted for 25minutes and the pressure is 0.35MPa.The best speed of reducing the surface roughness can be get when the current is with an intensity of 2.5A,the time is lasted for 10minutes and the pressure is 0.3MPa.Both processing quality and efficiency are taken into account,the current should be with an intensity of 3A,the time should last for 25minutes and the pressure should be 0.35MPa.The method simplified the optimization process,obtained the optimized parameters combination,provided data basis and methods for optimizing parameter.

Key words: fluid magnetic abrasives, hole, finishing, optimization of the process parameters, orthogonal experiment, grey correlation analysis