This method combines the quick ability of computer and experience of designer together and makes it possible that the popular blade drawing process known as Equal Angle Conversion method can be implemented in CAD software.

In order to make thickening vanes more exact when drawing impeller of a centrifugal pump,the problems are analyzed when thickening vanes with the traditional method.

The advanced integral designing strategy of vane foil was presented by SJTU-Foil choosing vane foil system for wind power from fan, A.

Based on economical and practical thoughts,a special machining method of the blade surfaces is presented in the paper,and some relative contents about it are simply introduced,such as its NC machining process method,the structure of the machine tool,work pieces' installation and the fixture,machining process and establishment and process of the blade surfaces' mathematical model.

This paper summarizes the present inspecting methods and the developing trend of blade surfaces inspection,and introduces a better device-the Laser-scanning Machine System.

The blades are key parts to the turbine、the aeronautic engine、the ship’s thruster and others equipments,its quality will directly influence the steamy turbine’s working,but the blade surfaces’quality will directly influence the blades’quality .

The paper introduces the construction features of undevelopable ruled surface integral impeller and two 5-Axis numerical control mill machining methods of vane shape which are "line contact" (flank milling) and "point contact".