液体磁性磨具孔光整加工工艺参数优化研究

Optimization of process parameters when finishing hole by fluid magnetic abrasives

合理选择液体磁性磨具孔光整加工工艺参数对于提高光整加工效率和孔内壁表面质量至关重要。而目前针对孔光整加工机理认识有限,参数优化成为了液体磁性磨具孔光整加工的难点之一,统筹考虑多工艺指标时的参数优化则更加困难。应用正交试验法,获得了单项工艺指标下的优化参数;采用灰色关联分析法,重点解决多工艺指标下参数优化问题。研究发现,电流强度为3.0A、加工时间为25min,以及入口压力为0.3MPa时,可以获得最佳的表面质量;电流强度为2.5A、加工时间为10min,以及入口压力为0.35MPa时,可以获得表面粗糙度最快降低速率,其中电流强度对加工质量和加工效率的影响程度最大。在统筹考虑加工质量和加工效率的情况下,最优参数组合:电流强度为3.0A、加工时间为10min,以及入口压力为0.3MPa。研究方法简化了优化过程,获得了优化后的参数组合,为孔光整加工参数选择和优化提供依据和方法借鉴。

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 pres- sure is 0.35 MPa. 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 parame- ter.