Modeling and machining of integral impeller based on NURBS curve

NURBS curve is applied to model and machine of integral impeller get better smooth streamline in this work. In order high precision surface modeling impeller, complex method for studied through inputting curves surfaces obtained by MATLAB into CAXA Manufacturing Engineer, which solves the problem that cannot be designed directly CAD software. Grooving expanding groove tool paths are according top root curve, its interpolation step size row spacing determined curvature period. Meanwhile, five-axis side milling used achieve vane finish machining, processing adopted realize machining channel. All work verified a virtual simulation system 5MC850-C center, these results show accuracy error between − 0.007 0.012 mm, meeting tolerance range design.