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Patchwork Blanks - an effective technology for the economic production of lightweight parts

: Neugebauer, Reimund; Mauermann, R.; Kühn, T.; Menzel, S.; Standfuß, J.; Jahn, A.

Europäische Forschungsgesellschaft für Blechverarbeitung e.V. -EFB-:
Technologies to Maximise Productivity in Sheet Metal Working : Kongress und Ausstellung für die Blechbearbeitung, 27. bis 29. November, Warschau
Warschau, 2007 (EFB-Tagungsband T28)
ISBN: 978-3-86776-302-8
7 pp.
BLECHbusiness Kongress <2007, Warschau>
Conference Paper
Fraunhofer IWU ()
Patchworktechnik; Patch; Randentspannung; Steifigkeitssprung; Patchrand; Grundblecheinschnürung; Klebschicht-Kennwertermittlung; Umformsimulation; Laser-Remote-Schweißen; umformoptimierte Schweißnaht; angepasste Nahtkontur; patchwork technology; Patchwork Blank; Patchworking; reinforcement; edge relaxation; laser remote welding; load adapted design

In the patchwork technology blanks are reinforced locally in highly stressed areas by bonded or welded sheets (patches). In contrast to other known procedures with reinforcements the joining is done while the sheets are flat. After this step the sheets are formed together as composite, thus considerably reducing the number of tools required for the forming operations.
To achieve successful forming processes of these reinforced blanks, new methods for the numerical simulation and the design of the patches and the connections were developed by the Fraunhofer Institute for Machine Tools and Forming Technology (IWU). In this presentation some results of our research work will be presented. An overview is given about how patchworking can be applied to complicated parts.