阐述了用矢量差分法处理径、轴流式涡流增压器扭曲叶片的四维数控加工数学处理问题,并对其误差特性进行了分析,重点叙述了一种新型的曲面数学处理方式矢量差分法.利用该方法能有效、简便地对各种类型的增压器叶片凹凸模具曲面进行分析、计算和处理,从而大大简化了常规曲面造型涉及所需的大量数值处理工作“,”This paper introduces the four dimension mathematical processing method of NCmachining for the axial-flow & radial-flow eddy pressurizer twist blade engineers and analyzes its tolerance character. It mainly describes a new mathematical processing method of surface vector difference method. The method can analyze, calculate, process various of eddy pressurizer blade surface easily and effectively . Thus if could simplify the amount work of data processing which there is in conventional surface modeling more greatly.