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Local deformation in roll forming

Abeyrathna, Buddhika, Rolfe, Bernard, Hodgson, Peter and Weiss, Matthias 2017, Local deformation in roll forming, International journal of advanced manufacturing technology, vol. 88, no. 9-12, pp. 2405-2415, doi: 10.1007/s00170-016-8962-0.

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Title Local deformation in roll forming
Author(s) Abeyrathna, BuddhikaORCID iD for Abeyrathna, Buddhika orcid.org/0000-0002-4476-3902
Rolfe, BernardORCID iD for Rolfe, Bernard orcid.org/0000-0001-8516-6170
Hodgson, Peter
Weiss, MatthiasORCID iD for Weiss, Matthias orcid.org/0000-0002-1845-6343
Journal name International journal of advanced manufacturing technology
Volume number 88
Issue number 9-12
Start page 2405
End page 2415
Total pages 11
Publisher Springer
Place of publication London, Eng.
Publication date 2017-02
ISSN 0268-3768
1433-3015
Keyword(s) roll forming
longitudinal edge strain
local deformation
Summary In a previous paper, a simple model was developed to extend the application of the traditional flower pattern diagram as a design tool for roll forming. The position of a point on the strip as it passes through each set of rolls can be identified as a series of points in the two-dimensional flower pattern diagram. In three dimensions, these points will lie on a non-circular cylindrical surface having its axis parallel to the machine axis. Assuming that these points are joined by a smooth curve, the forming path of a point on the strip as it passes through the roll forming process can be obtained as a plane curve on the plane development of this surface. It was shown in previous work that the longitudinal membrane strain and, in certain cases, local curvature of the sheet are functions of the slope of this plane curve. In this work, the strains on both surfaces at the edge of a strip in the forming of a simple V-channel are measured using strain gauges. It is shown that near the point of contact with the rolls, the strains differ by nearly an order of magnitude from those determined from the simple model which assumes that the trajectory is a smooth curve. A modification of the forming path is obtained from the measured bending strains. Although the changes in displacement are small, the peak values of strain near the point of roll contact are large and a consequence of highly localised changes in the forming path as the strip passes over each roll. Measurement of this perturbation in the forming path is difficult as the region is obscured by the forming rolls. The technique described here permits the reconstruction of this path and identifies a new area of investigation of longitudinal strains in roll forming. These are often associated with shape defects such as bow, warping and end flare.
Language eng
DOI 10.1007/s00170-016-8962-0
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Springer Verlag
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084302

Document type: Journal Article
Collection: Institute for Frontier Materials
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