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SHORT ORIGINAL PAPER

CAD-based design for welding (DFW) method Claudio Favi1

· Federico Campi2

Received: 6 March 2020 / Accepted: 24 September 2020 © Springer-Verlag France SAS, part of Springer Nature 2020

Abstract The paper provides a method to integrate Design for Welding (DFW) method with CAD systems. The method is based on three main phases: (i) definition of DFW rules for the development of mechanical products, (ii) link of DFW rules with product geometrical features that are available by the investigation of the 3D model, and (iii) integration with CAD systems to support product design review. A method and a software tool are described including their features to help designers in the product development process. Case study aims to validate the proposed method in the identification of assembly issues early in the product development process. The CAD-based DFW tool is a useful assistant to avoid design problems related to the welding technology. Keywords Design for welding · Design rules · Embodiment design · CAD system · Mechanical products · DFMA

1 Introduction Product Development Process (PDP) is a consolidated engineering activity that takes a product from conception to market. The steps in product development include drafting the concept, creating the overall design, developing detail design and prototyping [1, 2]. One of the most recurring disciplines in the engineering design contexts relates the solid modelling and drawing: CAD (Computer-Aided Design). Nowadays, CAD tools couple the initial capability for which it was conceived with the potentialities deriving from the integration of the multidisciplinary design methodologies (i.e. FEM, CAM) [3]. Design for Welding (DFW) is an engineering practice aiming at the reduction of assembly time for welding product/structure [4, 5]. However, DFW suffers a real integration with 3D CAD systems and it is currently applied downstream of the 3D modelling [6]. The goal of the paper is to provide a method able to link DFW approaches in the embodiment product design through the analysis of the 3D virtual model. Numerical parameters

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Claudio Favi [email protected] Federico Campi [email protected]

1

Università degli Studi di Parma, Parco Area delle Scienze 181/A, 43121 Parma, Italy

2

Università Politecnica delle Marche, Via Brecce Bianche n. 12, 60121 Ancona, Italy

of design features are related with design guidelines for the identification of assembly/welding issues within the analysis of the 3D model.

2 Materials and methods The CAD-based DFW method is based on three main phases: (i) definition of DFW rules for the development of mechanical products, (ii) link of DFW rules with product geometrical features that are available by the investigation of the 3D model, and (iii) integration with CAD systems to support product design review (see Fig. 1). The first phase allows to properly classify DFW rules (knowledge based system) through three main pillars: knowledge acquisition, knowledge processing, and knowledge representation. Knowledge acquisition re