整体叶盘电解加工电解液进液角度优化研究

Optimization of Electrolyte Solution Inlet Angle for Electrochemical Machining of Blisk

整体叶盘电解加工中,流场对加工稳定性起着重要作用,电解液进液角度对流场均匀性具有重要影响。针对由叶尖至叶根流动模式,设计了5种电解液进液角度流动模型(12°、22°、32°、42°以及52°),并开展电解加工流场仿真研究。结果表明,电解液进液角度为32°时,平均流速为19.01 m/s,流速均方差为6.33,满足整体叶盘电解加工对流场的要求。在电解液进液角度为32°的流场形式下,开展整体叶盘电解加工试验,加工过程稳定,试件表面无流纹,加工精度为0.12 mm,表面粗糙度为Ra0.353μm,验证了流场的合理性。

In the electrochemical machining(ECM)of the blisk,the flow field plays an important role in the machining stability,and the inlet angle of electrolyte solution has an important influence on the uniformity of theflowfield.For theflow pattern from blade tip to blade root,five inlet angleflow models(12°,22°,32°,42°and 52°)were designed,and theflowfield simulation of electrochemical machining was carried out.The results show that the averageflow rate is 19.01 m/s and the mean square deviation offlow rate is 6.33 when the inlet angle of electrolyte is 32°,which meets the requirements offlowfield for electrochemical machining of the blisk.Under theflowfield form with inlet angle of electrolyte solution of 32°,the electrochemical machining experiment of the blisk was carried out.The machining process was stable,the surface of the workpiece was free offlow texture,the machining accuracy was 0.12 mm,and the surface roughness was R a 0.353µm,which verified the rationality of theflowfield.