为合理利用流场因素以提高整体叶盘通道电解加工的稳定性和工件表面质量,设计了一种叶盘通道电解加工用的群孔管电极. 阐述了出液孔在等距分布的情况下,孔径大小对流场均匀性的影响. 建立了流场数学模型,并利用有限元法对流动方式进行流场数值模拟. 分析表明,在电极管径、出液孔数相同且加工稳定进行的情况下,一定范围内较小的出液孔径有利于提高流场的均匀性. 为了验证这种流动方式的合理性,文中还进行了整体叶盘通道电解加工试验,结果表明,采用较小孔径出液的流动方式可提高流场的均匀性,使加工过程稳定,叶盘通道侧壁表面流纹明显减弱.

In order to reasonably make use of the flow field to improve the stability and the w(3Irkpiece’s surface quality,a multi-hole tube electrode for the electrochemical machining(ECM)of blisk channels is designed. Then,the intluence of the diameter of outflow holes on che unifofruity of flow eld is elaborated on the premise tllat the adiacent holes distribute isometrically.Moreover,a mathematical model describing the flow field is established,and a flow-field numerical simulation for the flow mode iS carried out by means of the finite element method. Analytical results show that,during the stable ECM at the same electrode diameter and outflow holes number,a smaller outflow diameter within a eertain range is beneficial to the uniformity improvement of the flow field. In order to verify the reasonableness of this flow mode,some ECM experiments are finally carried out. The results indicate that a relatively small outflow diameter helps to improve the uniformity of the flow field,stabilize the ECM process and obviously reduce the lateral flowline crack of the blisk channels.