An Incremental Modelling Approach For The
Computation Of Elastic Tool Effects During Metal
Forming Simulations
Author(s)
S. Puchhala, M. Franzke & G. Hirt
Abstract
The elastic behaviour of the forming tools has a significant influence on the
quality of the end components. For example, in the case of the flat rolling
process, the strip quality criteria, i.e., strip flatness and thickness profile are
highly influenced by the elastic deformation of the working rolls. The Finite
Element (FE) Method is the standard approach for the computation of such
forming processes. Considering the elastic effects of the tolls in a single FE
model using a traditional approach (standard in the case of commercial FE
programs) will lead to large FE models (as very fine descretization of work piece
as well as tool at the contact regions is necessary). As a result, the computation
requires tremendous amount of time and resources. This paper presents a
recently developed concept, which meets the above mentioned demands very
efficiently. Within this concept, the computation of the tool elastic effects is
separated from the process simulation. The advantages of this concept include,
easy handling of the contact situations, reduced FE model size as the tool is
modelled as the rigid body and good convergence of the computation. On the
other hand, for the validation of the concept, optical measuring techniques were
used to validate the numerical simulations. The experimental results of the flat
rolling process were compared. To show the portability of the developed
concept, qualitative results of the forging process were also given.
Keywords: modelling of the flat rolling process, elastic tool behaviour, strip
tension modelling, optical measuring techniques.
Keywords
modelling of the flat rolling process, elastic tool behaviour, strip
tension modelling, optical measuring techniques
Related Book
Other papers in this volume
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