关键词: 整体叶盘, 径向电解加工, 叶盘轮毂, 流场设计, 可控对称式流场

Abstract:

Rational design of a flow field is a necessary precondition for the implementation of electrochemical machining.In order to implement the electrochemical machining of blisk channels in a full range,a radial feeding techniquewas applied to the electrochemical machining of a type of blisk. In the investigation,first,a new controllablesymmetric flow field of electrolyte was designed.Then,a finite element model of the flow field was constructed tosimulate the electrolyte flow. Finally,some electrochemical machining experiments were carried out to verify the rationalityof the designed flow field. The results show that,after the application of the controllable symmetric flowfield,the surface roughness of the blisk wheel hub decreases from 2.450 μm to 0.154 μm,the repeat accuracy ofwheel hub is less than 0.07mm,and the repeat accuracies of concave and convex airfoils are both less than 0.17mm,which means that the new flow field is well designed and is effective in improving the machining quality as well asthe machining stability and consistency of wheel hub.

Key words: blisk, radial electrochemical machining, blisk wheel hub, flow field design, controllable symmetricflow field