The Effects of Geometric Variables in Roll Forming a Channel Section

Zhu, Shengxin; Panton, S.M.; Duncan, J.L.

doi:10.1243/pime_proc_1996_210_098_02

Cited by 23 publications

(5 citation statements)

References 3 publications

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“…Therefore the bend angle increment is always higher in DP 780 sections than MS ones. This may cause higher peak strains in DP 780 sections than MS ones since peak strain increases with the bend angle increment [11][12][13].…”

Section: Resultsmentioning

confidence: 99%

An Experimental Investigation of Edge Strain and Bow in Roll Forming a V-Section

Abeyrathna

Rolfe

Hodgson

et al. 2013

MSF

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V-sections were roll formed from two grades of steel, and the strain on the top and bottom of the strip near the edge was measured using electrical resistance strain gauges. The channels were bent to a radius of 2 and 15 mm along the centerline. The steel strips were of mild and dual phase steel of yield strength 367 MPa and 597 MPa respectively. The longitudinal bow was measured using a 3-dimensional scanning system. The strain measurements were analysed to determine bending and mid-surface strains at the edge during forming. The peak longitudinal edge strain increased with material yield strength for both profile radii. For the 15 mm radius, the bow was larger in the dual phase steel than in the mild steel. For the 2 mm profile radius, the bow was smaller compared with the 15 mm profile radius and it was similar for both steels. It was observed that the difference between the peak longitudinal edge strain and yield strength to Youngs modulus ratio of the material is an important factor in determining longitudinal bow.

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Section: Resultsmentioning

confidence: 99%

An Experimental Investigation of Edge Strain and Bow in Roll Forming a V-Section

Abeyrathna

Rolfe

Hodgson

et al. 2013

MSF

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“…If significant plastic longitudinal strain is induced into the flange, profile defects like longitudinal curvature, canning or edge waves can occur [2]. The maximum longitudinal strain depends, among other things, on the flange length [12], the sheet thickness [13], the yield strength [14], the roll diameter [15], the station distance [16], the calibration method [17] and the bending angle [18]. An uneven distribution of the longitudinal strain across the cross section can also lead to horizontal and vertical curvatures [19], waves in the profile web [20] or a twisting of the profile [19].…”

Section: Roll Formingmentioning

confidence: 99%

“…Fig 13. End flare (experiment and simulation) after every forming station (left) and end flare (simulation) after the 1st station depending on the bending angle (right)…”

mentioning

confidence: 99%

The origin of end flare in roll formed profiles

Moneke

Groche

2021

Int J Mater Form

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Roll forming is a continuous manufacturing process designed for large batch sizes. In order to economically produce roll formed parts with smaller batch sizes, the process setup times have to be reduced. During the setup, profile defects and especially the deformation caused by the release of the process-inherent residual stresses, also known as end flare, have to be counteracted. However, the knowledge regarding the creation of residual stresses is limited and the ability to reduce end flare usually depends on the experience of the process designer and the machine operator, which makes the setup time-consuming and cost-intensive. Therefore, in this paper the creation of end flare during the roll forming process is investigated in depth. As a result of this study explanation models for U-, C- and Hat-profiles, which link the creation of residual stresses to the local deformation during the forming process, are developed. Knowing how changes in the forming curve affect the creation of end flare allows to use a knowledge-based approach during the design and setup process, thereby reducing time and costs.

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“…For the roll forming of almost any open section profile, there exist numerous basic approaches and possibilities of how to generate an optimum flower pattern. Recent research work in the general field of roll forming mainly focussed on influencing factors in terms of spring back analysis [14][15][16][17][18], the achievable geometrical accuracy regarding the macroscopic profile geometry [9,[14][15][16][17][18], the influence of longitudinal stresses [10,16,18,24] or the development of CAD systems specialized on roll forming [7,8,[11][12][13]19,[22][23][24].…”

Section: Classification Of Tube Rollmentioning

confidence: 99%

Roll Forming Strategies for Welded Tubes

Groche

Breitenbach

2008

steel research international

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Tubes are used as semi‐finished products as well as final components in almost all areas of the engineering industry. Roll forming of tubes with longitudinally oriented welding lines is one of the most efficient and economic tube production processes. However, numerous roll forming strategies already exist. Each strategy involves a characteristic change of the material properties from the initial slit strip to the final tube. A classification of the different roll forming strategies, which is given in this paper, aims to provide a systematic overview. A finite element analysis of the roll forming process is presented to identify specific forming loads and property changes.

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The Effects of Geometric Variables in Roll Forming a Channel Section

Cited by 23 publications

References 3 publications

An Experimental Investigation of Edge Strain and Bow in Roll Forming a V-Section

An Experimental Investigation of Edge Strain and Bow in Roll Forming a V-Section

The origin of end flare in roll formed profiles

Roll Forming Strategies for Welded Tubes

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