密集大扭转角自由曲面叶栅电解加工阴极结构设计

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。

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

This paper dem onstrates the m ethod of optim izing cathode structure for electrochem ical m achining process of intensive integral blade lattice w ith large torsion angle and free-form surface. For this kind of special structure of the w hole com ponent,the traditional m illing can not m eet the requirem ent,but currently ECMalso exists som e problem s. Machining surface of cathode cannot cover free curved blade and is easy to appear negative angle bard. C hannel of integral blade lattice is so narrow that cathode cannot pass. In view of the existing problem s,the article uses the optim ization of the cathode feed direction and m achining surface of cathode to im prove the processing coverage and the accuracy of blade. In the presence of narrow of blade lattice,w ith the help of interference detection and precise path planning,taking the m inim um thickness of cathode as initial value and designing several kinds of param eters about thickness of cathode and allow ance of integral blade lattice in the article aim s at im proving the electrode passing ability. Through sim ulation,the result is very good. It indicates that the m ethod of optim izing both electrode feed direction and m achining surface of cathode is effective and reversely looking for param eters com bination,not only can effectively shorten the designing tim e,but also deduce the large num ber of extensive practical tests.