复合进给电解加工机床的研制

Development of compound feeding electrochemical machine tool

针对现有电解预加工叶片型面复杂、叶栅通道扭曲的整体叶盘时存在的加工余量分布不均、余量差过大等问题,分析了现有技术中工具电极单一直线进给的缺点,基于工具电极可直线与旋转复合进给加工方法,研制了可以实现复合进给运动的电解加工机床,并配合基于PMAC的开放式数控系统,使该机床具有高精度、高柔性、开放化等特点,同时,研究了机床最优进给路径的实现方法,从理论上证明了该方法的优点及可行性。相较于现有技术,该机床有助于提高叶栅通道的加工精度、减小加工余量差,为后续叶片型面精加工奠定了良好的加工基础。

For the existing electrochemical pre-processing complex blade surface and twisted channel of the blisk, there still exist some issues on uneven distribution of machining allowance and excessive allowance difference. The shortcomings of a single linear feeding of tool electrode in the existing technology were analyzed. Based on the method of the tool electrode that can be fed with the linear and rotating compound feed put forward, the electrochemical machine tool realizing the compound feeding movement of the tool electrode is developed. Cooperating with the open CNC system based on PMAC, the machine has the characteristics of high precision, high flexibility and openness, and the realization method of the optimal feeding path of the machine was studied, the advantages and feasibility of the method was proved theo- retically. Compared with the existing technology, the machine tool can improve the machining accuracy of the channel and reduce the machining allowance difference, and provide a good machining foundation for further finish machining of blade profile.