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Extension of geometric limits in drawing of stringer sheets

Köhler, Stefan and Rohnert, Christoph and Groche, Peter (2018):
Extension of geometric limits in drawing of stringer sheets.
In: Procedia Manufacturing, pp. 693-700, 15, [Article]

Abstract

Stringer sheets are sheet metal parts with ribs. A process chain consisting of laser welding and subsequent forming allows the productive manufacturing of spatially curved stringer sheets. Compressive strains in concave curvatures can cause buckling of the stringers and define a process limit. We present a cam-actuated lateral support mechanism for the stringers to exceed current limits without reducing the productivity of the process. The experimental investigations show feasible stringer heights three times higher for supported stringers compared to non-supported stringers. The influence of this suppression of buckles on stiffness and springback is shown.

Item Type: Article
Erschienen: 2018
Creators: Köhler, Stefan and Rohnert, Christoph and Groche, Peter
Title: Extension of geometric limits in drawing of stringer sheets
Language: English
Abstract:

Stringer sheets are sheet metal parts with ribs. A process chain consisting of laser welding and subsequent forming allows the productive manufacturing of spatially curved stringer sheets. Compressive strains in concave curvatures can cause buckling of the stringers and define a process limit. We present a cam-actuated lateral support mechanism for the stringers to exceed current limits without reducing the productivity of the process. The experimental investigations show feasible stringer heights three times higher for supported stringers compared to non-supported stringers. The influence of this suppression of buckles on stiffness and springback is shown.

Journal or Publication Title: Procedia Manufacturing
Volume: 15
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institut für Produktionstechnik und Umformmaschinen (PtU)
Date Deposited: 13 Aug 2018 07:53
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