Volume 14, Issue 6 (9-2014)                   Modares Mechanical Engineering 2014, 14(6): 72-80 | Back to browse issues page

‎ 20.1001.1.10275940.1393.14.6.17.6

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Mohammadi M, Moslemi Naeini H, Kasaei M M, Salmani Tehrani M, Abbas Zadeh B. Investigation of Web Warping of Profiles with Changing Cross Section in Flexible Roll Forming Process. Modares Mechanical Engineering 2014; 14 (6) :72-80
URL: http://mme.modares.ac.ir/article-15-10236-en.html
Investigation of Web Warping of Profiles with Changing Cross Section in Flexible Roll Forming Process
Mehran Mohammadi , Hassan Moslemi Naeini * , Mohammad Mehdi Kasaei , Mehdi Salmani Tehrani , Behnam Abbas Zadeh
Abstract:   (4907 Views)
Flexible roll forming is a modern process for producing profiles with changing cross section. One of the important defects in this process is the web warping of product that causes failure to obtain dimensional and geometrical tolerances. In this paper, mechanism of web warping occurrence was investigated by finite element simulation in ABAQUS/CAE software. Results of simulation indicated that inadequate longitudinal strain in the edge of profile’s flange in transition zone is the reason of profile’s web warping. Furthermore, the effect of geometric parameters of product such as flange length, bend angle, radius of transition zone and thickness on the web warping were determined. Analysis of variance showed flange length and bend angle are recognized as the most effective factors on warping of profiles with specific thickness. An equation for prediction of warping was proposed in terms of geometrical parameters of product. In order to verify the finite element model, the longitudinal strain of deformed strip edge was obtained from simulations and compared with the experimental results of other researchers. A good agreement between them confirmed the accuracy of the finite element model.
Keywords: Flexible roll forming, Changing cross section profile, Web warping
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Article Type: Research Article | Subject: Finite Elements Method|Metal Forming
Received: 2013/08/21 | Accepted: 2013/11/3 | Published: 2014/07/13
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