Improvement strategy for edge waviness in roll bending process of corrugated sheet metals

Improvement strategy for edge waviness in roll bending process of corrugated sheet metals This paper focuses on the corrugated thin-walled sheet metal in the roll bending process. The main defect that appears in corrugated panels subjected to high amounts of bending deformation is a wavy edge. Edge defects are caused by excessive longitudinal stress and strain near the edge of the plate, and local edge buckling may occur when some critical value of the bending radius is exceeded. This paper proposes two different approaches to avoid a wavy edge for a formed panel: excessive stress on the edge region is restrained by controlling the length of the cross-sectional end of the corrugated panel while considering the stress distribution, and the bending radius in each forming step is determined by considering the strain limit at which the initial edge waviness occurs to avoid excessive compression at particular steps. The experimental and numerical results indicated that the two proposed design strategies can minimize wavy edges in the formed shape. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Material Forming Springer Journals

Improvement strategy for edge waviness in roll bending process of corrugated sheet metals

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Publisher
Springer Paris
Copyright
Copyright © 2016 by Springer-Verlag France
Subject
Engineering; Operating Procedures, Materials Treatment; Materials Science, general; Manufacturing, Machines, Tools; Mechanical Engineering; Computational Intelligence; Computer-Aided Engineering (CAD, CAE) and Design
ISSN
1960-6206
eISSN
1960-6214
D.O.I.
10.1007/s12289-016-1303-x
Publisher site
See Article on Publisher Site

Abstract

This paper focuses on the corrugated thin-walled sheet metal in the roll bending process. The main defect that appears in corrugated panels subjected to high amounts of bending deformation is a wavy edge. Edge defects are caused by excessive longitudinal stress and strain near the edge of the plate, and local edge buckling may occur when some critical value of the bending radius is exceeded. This paper proposes two different approaches to avoid a wavy edge for a formed panel: excessive stress on the edge region is restrained by controlling the length of the cross-sectional end of the corrugated panel while considering the stress distribution, and the bending radius in each forming step is determined by considering the strain limit at which the initial edge waviness occurs to avoid excessive compression at particular steps. The experimental and numerical results indicated that the two proposed design strategies can minimize wavy edges in the formed shape.

Journal

International Journal of Material FormingSpringer Journals

Published: Jun 16, 2016

References

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