整体叶轮分步法数控电解加工工艺与路径规划

针对航空发动机大直径整体叶轮加工难题，在单步加工法工艺基础上对叶片电解加工工艺进行了改进,提出了分步法叶片电解加工工艺方法。制定了叶片的分步电解加工方案，开发了整体叶轮叶片电解加工的专用软件，利用该软件对叶片电解加工工序的加工区域进行了合理划分并对加工路径进行了规划；采用切片法提取了叶片加工的工艺数据，据此计算出阴极运动的控制轨迹与各坐标轴运动分量，实现了叶片数控加工编程；最后通过加工试验验证了该工艺方法的可行性。实验证明，该工艺方法从加工原理上和技术手段上解决了大直径整体叶轮叶片加工问题，提高了叶片加工质量与加工精度。

NC Electrochemical Machining Process and Machining Path Planning of Integral Impeller with Fractional-Step Method

In order To solve machining problems of integral impeller in aviation engine, an improved electrochemical machining process named as the fractional-step method is presented on basis of the one step method. Firstly the blade machining process with certain machining sequences is proposed. Therefore， a set of application software is developed. The processing areas of the different procedures are correctly classified and the cutting path is working out with help of the software. Then the blade data is extracted by section-cutting. The motion paths of tool-cathode and the displacements of the axes on machine are calculated according to the data. Lastly an application example is used to verify feasibility of the method. The results prove that the key problems on the blade machining have been solved from the aspects of machining principal and technical method, the shaping accuracy and quality are improved.