TU Darmstadt / ULB / TUbiblio

Counter measures to effectively reduce end flare

Moneke, Matthias and Groche, Peter :
Counter measures to effectively reduce end flare.
In: Proceedings of the 20th International ESAFORM Conference on Material Forming, 26.04.2017-28.04.2017, Dublin. In: Proceedings of the 20th International ESAFORM Conference on Material Forming , 1896 . AIP Publishing
[Conference or Workshop Item] , (2017)

Abstract

Roll forming is a manufacturing process, whose profitability is predicated on its high output. When roll formed profiles are cut to length, process related residual stresses are released and increased deformation at the profile ends at the cut-off occurs, also known as end flare. U-profiles typically show a flaring in at the lead end and a flaring out at the tail end. Due to this deformation, deviations from the dimensional accuracy can occur, which cause problems during further processing of the parts. Additional operations are necessary to compensate for the end flare, thereby increasing plant deployment time and production costs. Recent research focused on the cause of the residual stresses and it was shown, that a combination of residual longitudinal stresses and residual shear stresses are responsible for end flare. By exploiting this knowledge, it is possible to determine, depending on the flaring of the profile, in which part of the profile residual longitudinal or residual shear stresses are prevalent and which counter measures can specifically counteract the responsible residual stresses. For this purpose numerical and experimental investigations on a U-, Hat- and C-Profile were conducted. It could be shown that overbending and bending back of the profile is most effective in reducing end flare. Another developed method is lowering and elevating the profile to reduce residual longitudinal stresses.

Item Type: Conference or Workshop Item
Erschienen: 2017
Creators: Moneke, Matthias and Groche, Peter
Title: Counter measures to effectively reduce end flare
Language: English
Abstract:

Roll forming is a manufacturing process, whose profitability is predicated on its high output. When roll formed profiles are cut to length, process related residual stresses are released and increased deformation at the profile ends at the cut-off occurs, also known as end flare. U-profiles typically show a flaring in at the lead end and a flaring out at the tail end. Due to this deformation, deviations from the dimensional accuracy can occur, which cause problems during further processing of the parts. Additional operations are necessary to compensate for the end flare, thereby increasing plant deployment time and production costs. Recent research focused on the cause of the residual stresses and it was shown, that a combination of residual longitudinal stresses and residual shear stresses are responsible for end flare. By exploiting this knowledge, it is possible to determine, depending on the flaring of the profile, in which part of the profile residual longitudinal or residual shear stresses are prevalent and which counter measures can specifically counteract the responsible residual stresses. For this purpose numerical and experimental investigations on a U-, Hat- and C-Profile were conducted. It could be shown that overbending and bending back of the profile is most effective in reducing end flare. Another developed method is lowering and elevating the profile to reduce residual longitudinal stresses.

Series Name: Proceedings of the 20th International ESAFORM Conference on Material Forming
Volume: 1896
Publisher: AIP Publishing
Uncontrolled Keywords: Roll Forming, End Flare
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institut für Produktionstechnik und Umformmaschinen (PtU)
Event Title: Proceedings of the 20th International ESAFORM Conference on Material Forming
Event Location: Dublin
Event Dates: 26.04.2017-28.04.2017
Date Deposited: 25 Oct 2017 08:05
DOI: 10.1063/1.5007963
Export:

Optionen (nur für Redakteure)

View Item View Item