I tried to do the drawing in adobe illustrator and exporting the file in .dwg format, but the difficulty is to make the faces of the drawing perfectly correspond.
What are you starting from? It is perfectly possible to create a 3D model directly with no 2D drawings to start from. And you can export 2D drawings from a finished 3D model. If, on the other hand, you already have 2D blueprints of your intended object, you can import them either in an image or DWG/DXF format (Pro) to use as guides when modelling.