Abstract
One of the most relevant research issues in automotive field is focused on the reduction of stamped parts weight also increasing their strength. In this way, a strong research effort is developed on high strength steels which are widely utilized and they require a proper springback control. Springback reduction in sheet metal forming is a typical goal to be pursued which is conflicting with thinning reduction for instance. Thus, such problems can be considered as multi-objective ones characterized by conflicting objectives. What is more, nowadays, a great interest would be focused on the availability of a cluster of possible optimal solutions instead of a single one, particularly in an industrial environment. In this paper, integration between numerical simulations, response surface methodology and Pareto optimal solutions search techniques was applied in order to design a DP 600 U-channel shape stamping operation. In particular the friction conditions and blank holder force were optimized as design variables in order to accomplish two different objectives: reduce excessive thinning and avoid excessive geometrical distortions due to springback occurrence.
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Di Lorenzo, R., Ingarao, G., Micari, F. et al. A Pareto optimal design approach for simultaneous control of thinning and springback in stamping processes. Int J Mater Form 2 (Suppl 1), 801 (2009). https://doi.org/10.1007/s12289-009-0485-x
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DOI: https://doi.org/10.1007/s12289-009-0485-x