整体叶盘通道电解加工流场的均匀性  

Uniformity of Flow Field in Electrochemical Machining of Blisk Tunnel

作　　者：徐庆[1] 朱荻[1] 徐正扬[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《华南理工大学学报（自然科学版）》2011年第6期7-12,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51005119);国家"863"计划重点项目(2009AA044206);江苏省自然科学基金资助项目(BK2010506);南京航空航天大学青年科技创新基金资助项目(NS2010141)

摘　　要：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 workpiece＇s surface quality,a multi-hole tube electrode for the electrochemical machining（ECM） of blisk channels is designed.Then,the influence of the diameter of outflow holes on the uniformity of flow field is elaborated on the premise that the adjacent 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 certain 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 re-latively small outflow diameter helps to improve the uniformity of the flow field,stabilize the ECM process and ob-viously reduce the lateral flowline crack of the blisk channels.

关 键 词：整体叶盘 电解加工 流场 均匀性 有限元法 数值模拟 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]