Research on the NURBS unrolling&rolling of the columned entity design

The complex columned entity design is very difficult. The paper mainly discussed 3D modeling technology, bought forward the NURBS (non-uniform rational B-splines) unrolling and rolling algorithms, explained the NURBS circle and cylinder NURBS surface unrolling & rolling and analyzed the unrolling and rolling error. The unrolling & rolling programs which run in the CAD software have been developed. By a sample, It shows that the unrolling & rolling program will make designing the complex columned entity more easily and efficient. The program of the unrolling & rolling algorithms is applied successfully in the camera part model.