密集大扭转角自由曲面叶栅电解加工阴极结构设计  

Cathode Structure Designing for Electrochemical Machining of Integral Blade Lattice with Large Torsion Angle and Free-Form Surface

作　　者：褚玉程[1] 张明岐[1] 程小元[1] 雷廷玲 

机构地区：[1]北京航空制造工程研究所,北京100024

出　　处：《电加工与模具》2016年第5期37-41,共5页Electromachining & Mould

摘　　要：针对密集大扭转角自由曲面叶栅电解加工,论述了单方向全覆盖整体阴极的设计方法。大扭转角叶栅电解加工阴极设计中存在电极覆盖性不好、叶栅通道狭窄和电极通过性差等问题。采用优化电极进给方向与加工型面相结合的方式,预先设计多组不同厚度电极和不同余量叶片逆向寻找最佳的参数组合方式,并在UG软件干涉模块模拟下,验证优化后电极的有效性。结果表明:电极进给方向和加工型面共同优化的方式能有效解决叶片自由曲面覆盖性不好等问题。以最小电极厚度为初始值,逆向寻找厚度和余量参数组合方式,不仅能缩短电极设计和路径规划的时间周期,而且能节省前期大量试验投入。This paper demonstrates the method of optimizing cathode structure for electrochemical machining process of intensive integral blade lattice with large torsion angle and free-form surface. For this kind of special structure of the whale component,the traditional milling can not meet the requirement,but currently ECM also exists some problems. Machining surface of cathode cannot cover free curved blade and is easy to appear negative angle bard. Channel of integral blade lattice is so narrow that cathode cannot pass. In view of the existing problems ,the article uses the optimization of the cathode feed direction and machining surface of cathode to improve the processing coverage and the accuracy of blade. In the presence of narrow of blade lattice, with the help of interference detection and precise path planning ,taking the minimum thickness of cathode as initial value and designing several kinds of parameters about thickness of cathode and allowance of integral blade lattice in the article aims at improving the electrode passing ability. Through simulation ,the result is very good. It indicates that the method of optimizing both electrode feed direction and mac surface of cathode is effective and reversely looking for parameters combination,not only can effectively shorten the designing time, but also deduce the large number of extensive practical tests.

关 键 词：电解加工 电极结构设计 大扭转角 密集型叶栅 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]