Models for Manufacturing is a new approach proposed by the authors to apply Model-based Systems Engineering concepts to Manufacturing. The methodology under development is supported by a 3-layer framework (referred to as Data Base and Interfaces, Ontology and Software Tools layers) and simple and easy-to-use software tools. This work presents a preliminary implementation of Models for Manufacturing to SPIF, an innovative incremental sheet forming that makes use of CNC technology and usually requires a numerical study to validate the manufacturing process. The work introduces the proposed methodology and presents the model in development with special emphasis on the Ontology layer.