涡轮叶片电解加工阴极设计方法研究

Study on Cathode Design Method for Electrolytic Processing of Turbine Blade

电解加工技术是目前航天航空发动机核心零部件涡轮叶片的主要加工方法之一。叶片电解加工工具阴极设计方法与修正是提高叶片电解加工精度的关键。电解加工中阴极进给角度、工件装夹角度和工件型面法线方向夹角的规范性和均匀性是影响阴极设计准确性的重要因素。分析某小型发动机涡轮转子叶片三维模型结构,建立叶片型面上各采样点对应的阴极工具型面加工间隙的分布规律模型。优化阴极进给角度与毛坯件装夹角度,结合电场仿真分析进行优化,研究提高阴极型面设计精确度的电解加工阴极型面模型的设计方法。

Electrochemical machining is one of the main machining methods for turbine blades of aerospace engine core component.The cathode design method and correction of blade electrochemical machining tools are the key to improve the accuracy of blade electrochemical machining.In electrochemical machining,the standardization and uniformity of the cathode feed angle,the workpiece clamping angle and workpiece profile normal direction angle are important factors affecting the accuracy of the cathode design.The three-dimensional model structure of turbine rotor blade of a small engine was analyzed,the distribution law model of machining gap between cathode tool profiles corresponding to each sampling point on blade profile was established.The cathode feeding angle and the blank clamping angle were optimized,combined with the electric field simulation analysis,and the cathode profile model design method of electrolytic machining was studied to improve the cathode profile design accuracy.