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Souleymane Ramde
Abstract
Numerical simulation of a cutting process and a method for optimizing the quality of cut and loads on the tooling
Souleymane Ramde - 16 December 2010
Cutting tools (punching, shearing) used in the automotive
industry are increasingly being subjected to higher mechanical
stresses, especially due to the higher mechanical strength of
new sheet materials. The operating parameters such as radius of
shearing blade, and clearance between the tools are generally
defined to optimize the shearing quality (burr height,
appearance of rough surface). The purpose of this PhD thesis is
to propose a method for defining parameters to optimize tooling
simultaneously, the loads on the tooling and the quality of
cut. Aspects of numerical simulation and experimental study of
shearing were discussed.
Experimental studies (shearing, punching) were performed to
characterize the effort required to cut three shades of sheet
material (DC04, E220BH and DP500).
Numerical simulation models developed for cases of punching and
shearing were validated by comparison with experimental results.
Optimization of tools parameters to minimize the stresses on
tools and improving the quality of shearing was performed.
Finally, a structural analysis throughout the blade gives an
indication of the levels of stress and strain in tools.
Keywords : trimming, blanking, numerical simulation, mono and multi-objective optimization, automotive tools.
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