ENBIS: European Network for Business and Industrial Statistics

Sequential determination of process windows for the sheet metal spinning process

23 September 2009, 11:35 – 11:55

Abstract

Submitted by

Simone Wenzel

Authors

S. Wenzel, S. Straatmann, L. Kwiatkowski, A. E. Tekkaya, and J. Kunert

Affiliation

Technische Universität Dortmund

Abstract

Sheet metal spinning is a complex incremental forming process. Up to now, the underlaying principles are hardly understood. Standard DoE methods, such as DACE, can only be used to analyze the processes functionality if missing values can be avoided. This requires a known process window, which is not available for the given process, since it is strongly dependent of the thickness of the material that is to be formed. With the help of a sequential strategy we determine process windows for different thicknesses. Thereby, the process windows are determined based on the assumption of a convex window and a rough idea of the parameter space that includes at least a part of the feasible region. In each step of the strategy, we enlarge and / or restrict the examined parameter space according to the occurring failures using polyhedral convex cones. The results show a change of the process window depending on the initial wall thickness. This can be used for a choice of a feasible parameter setting to set up this sophisticated forming process.

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