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Proceedings of CAD'16, 2016, 152-156
An Approach to Support Model Based Definition by PMI Annotations

Paolo Cicconi, Michele Germani, Università Politecnica delle Marche
Roberto Raffaeli, eCampus University

Abstract. Nowadays, the necessity to implement the paradigm of the Model-Based Enterprise (MBE) is a very common issue in many industries. The development of hardware and computer graphics technologies allow to view a 3D model with a set of digital annotations and information throughout the product lifecycle. The introduction of digital annotations marks the transition from 2D drawings to 3D representation in manufacturing and design companies. A 3D CAD model is considered as a source for delivering documentation and knowledge sharing. Several ISO and ASME standards provide the specifications concerning the Model Based Definition (MBD) related to all extended 3D annotations such as Views, Product Manufacturing Information (PMI) and Geometric Dimensioning and Tolerancing (GD&T). Generally, the task of adding annotations is assigned to designers. Before the introduction of digital annotations, the designer put dimensions and tolerances only in 2D drawings during the engineering phase. A CAD system was mainly considered as a tool to support the generation of 2D technical drawings. Today, with the introduction of digital annotations, the designer has to add product lifecycle data on the 3D model in the modelling phase.

Keywords. Model-Based Definition (MBD), Product Manufacturing Information (PMI), digital annotations

DOI: 10.14733/cadconfP.2016.152-156