摘要
电解加工(ECM)是一种非接触式加工工艺,阴极进给方向对最终的加工精度有重要影响。斜向叶片式扩压器轮毂面较为扭曲,针对其叶片型面电解加工,提出了一种基于遗传算法的阴极进给方向综合优化方法。该方法将夹角的最大值和阴极侧面与轮毂面之间的间隙方差同时作为遗传算法的评价指标,在保证夹角最大值相对较小的情况下,使得阴极侧面与轮毂面之间的间隙分布更加均匀,从而避免轮毂面发生余量不均或过切现象。为了验证该优化方法的有效性,基于优化结果进行了夹具设计并开展扩压器电解加工试验,结果表明,叶片型面加工误差小于0.12mm,轮毂无过切现象,实现了该扩压器的电解精加工。
Electrochemical Machining(ECM)is a non-contact machining process,the final machining accuracy of which is significantly influenced by the feed direction of cathodes.Since the hub surface of the diffuser with oblique blades is distorted,a comprehensive optimization method of cathode feed direction based on genetic algorithm is proposed for electrochemical machining of the blade surface.In this method,the maximum angle and the gap variance between the cathode side and the hub surface are taken as the evaluation indexes of the genetic algorithm.Under the condition that the maximum angle is relatively small,the gap distribution between the cathode side and the hub surface is more uniform,so as to avoid the phenomenon of uneven margin or overcut on the hub surface.To verify the effectiveness of the optimization method,the fixture is designed based on the optimization results,and the electrochemical machining experiment of diffusers is carried out.The results showed that the machining error of blade surface is less than 0.12 mm,and there is no overcut on the hub surface.The electrochemical precision machining of the diffuser is realized.
作者
赵静波
徐正扬
刘强
ZHAO Jingbo;XU Zhengyang;LIU Qiang(College of Mechanical&Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2022年第4期265-273,I0002,共10页
Acta Aeronautica et Astronautica Sinica
基金
国家科技重大专项(2017-Ⅶ-0004-0097)
国家自然科学基金创新群体项目(51921003)。
关键词
电解加工
扩压器
叶片型面
进给方向
加工精度
electrochemical machining
diffuser
blade surface
feed direction
machining accuracy
