We are working in the design process of progressive dies to make that process more structured and, by this way, to be able to automate the different design phases. The basic phases that it’s necessary to follow in the design of a progressive die could be divided into two groups: 1. The strip layout design. This phase involves several steps such as to obtain blank development, to find the best layout, to define the sequence of operations, to calculate the forces... 2. The die design according to the strip layout previously designed. The characteristics’ die depends on the tools are necessary to use (standard or specific for each die), maintenance... These two phases are not independent between them, and the final and optimal design is achieved improving iteratively these phases. In the first phase, the strip layout design, one of the more important steps is to define all the operations that it’s necessary to carry out and the sequence that these operations have to follow to get the part with the wanted characteristics. In the present paper it’s presented a methodology and the software with its application. This methodology consists of extracting all data are going to be use to manufacture the part from its solid modeling or 3D representation. These data are used to create a relational diagram (or relational tree) that shows the relationship among the different features that form the part. Once this tree is represented, it’s used to define the operations that are going to be made and to obtain a first approximation to the sequence of operations that the designers could change according their experience.

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