Surface modeling for 3-D integral impeller and CAM technology

By using the inverse calculating method of B-spline interpolating curve, the shroud camber line and the hub camber line of a 3-D integral impeller are formed based on two groups of data points. The ruled surfaces of a blade camber surface and a blade surface are then constructed. A kind of side machining cutter location of this impeller is given by means of ball-end cylindrical cutter in 5-axis NC (numerical control) machine tools. The concrete methods of surface modeling and NC machining simulation are provided based on UG (unigraphics) software. The results indicate that the method, which combines theoretical analysis with simulating technology, is an effective approach to surface modeling and tool-location verification in NC machining.