A new method for increasing LDR in deep drawing is application of anti-lock braking system (ABS) on blank holder. In this method, instead of applying a constant force on blank and control the metal flow, the ABS system holds and releases the blank several times (20 to 50 times) which results increasing LDR. This study investigates the effect of different parameters of ABS on improving the condi...

A new method for increasing LDR in deep drawing is application of anti-lock braking system (ABS) on blank holder. In this method, instead of applying a constant force on blank and control the metal flow, the ABS system holds and releases the blank several times (20 to 50 times) which results increasing LDR. This study investigates the effect of different parameters of ABS on improving the condi...

The accuracy of simulations of the plastic deformation of sheet metal depend to a large extend on the description of the yield surface, the hardening and the friction. In this paper simulations of deep drawing of an AlMg alloy with a shell model are presented. The yield surface is described by a Von Mises, a Hill ’48 and a Vegter yield function. The parameters for the model are based on biaxial...

Although solid models play a central role in modern CAD systems, 2D CAD systems are still commonly used for designing products without complex curved faces. Therefore, an important task is to convert 2D drawings to solid models, and this is usually carried out manually even in present CAD systems. Many methods have been proposed to automatically convert orthographic part drawings of solid objec...

The development of advanced CAD systems is primarily directed towards a system controlled representation of the design semantics due to the interdependencies among the technical objects in the technical design process. In this paper, we introduce technical-functional dependencies to represent these relationships in an explicit manner. After that, a proposal for the modelling and the managing of...

The effective management of construction drawings is an important provision in the design and construction process, particularly where they amount to many hundreds or thousands. Whilst nowadays the majority of drawings are CAD based and therefore compatible for computer based management systems, there is still little evidence of this being employed. This fact is surprising in view of the substa...

Freehand sketching is an important part of the conceptual design process, and the increasing number of recent sketching applications shows a developing awareness of this importance. We aim to provide an automated tool to turn engineers’ freehand sketches into CAD models. This would allow engineers to spend their time more productively and to be more creative. One natural component of such a too...