分析了数控展成电解加工整体叶轮叶片的直纹曲面所产生的误差 ,对产生误差的各有关因素及可能产生误差的大小 ,进行了分析计算。在此基础上 ,提出了减小加工误差的具体措施 The error caused by the CNC machining of the ruled curved surface of the whole impeller blade was analyzed. The relevant factors that caused the error and the possible size of the error were analyzed and calculated. On this basis, the specific measures to reduce the processing error are put forward