Experimental study of bowing defects in pre-notched channel section products in the cold roll forming process

2016 ◽  
Vol 87 (1-4) ◽  
pp. 997-1011 ◽  
Author(s):  
Behrooz Shirani Bidabadi ◽  
Hassan Moslemi Naeini ◽  
Rouhallah Azizi Tafti ◽  
H. Barghikar
Keyword(s):  
Experimental Study ◽  
Roll Forming ◽  
Cold Roll Forming ◽  
Forming Process ◽  
Channel Section ◽  
Cold Roll ◽  
Roll Forming Process

418 Cold roll forming process of wrought magnesium alloy using finite element analysis

2014 ◽  
Vol 2014.22 (0) ◽  
pp. 163-164
Author(s):  
Shintaro AKANUMA ◽  
Tomoya SUZUKI ◽  
Hayato ASO ◽  
Bunkyo KYO ◽  
Shinichi NISHIDA ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Magnesium Alloy ◽  
Roll Forming ◽  
Cold Roll Forming ◽  
Forming Process ◽  
Element Analysis ◽  
Cold Roll ◽  
Wrought Magnesium Alloy ◽  
Roll Forming Process

scholarly journals A Method for Rapid Prediction of Edge Defects in Cold Roll Forming Process

Mathematics ◽  
2021 ◽  
Vol 9 (16) ◽  
pp. 1902
Author(s):  
Zhijuan Meng ◽  
Yanan Fang ◽  
Lidong Ma
Keyword(s):  
Longitudinal Strain ◽  
Roll Forming ◽  
Cold Roll Forming ◽  
Forming Process ◽  
Yield Strain ◽  
Cold Roll ◽  
Rapid Prediction ◽  
Edge Defects ◽  
The Mean ◽  
Roll Forming Process

In order to implement rapid prediction of edge defects in the cold roll forming process, a new analytical method based on the mean longitudinal strain of the racks is presented. A cubic spline curve with the parameters of the cumulative chord length is applied to fit the corresponding points and center points of different passes, and fitting curves are obtained. As the cold roll forming is micro-tension forming, the tensions between racks are ignored. Then the mean longitudinal strains between racks are obtained. By comparing the mean longitudinal strain between racks and the yield strain of the material, we can judge whether there are defects at the edges. Finally, the reasonableness of this method is illustrated and validated by an example. With this method, the roll forming effect can be quickly predicted, and the position where a greater longitudinal strain occurred can be determined. In order to prevent the defects, the deformation angles need to be modified when the result is beyond the yield strain. To further prove the correctness of the theory, the results of the analytical method are compared with the ones of the non-linear finite element software ABAQUS. The analytical results have the same trend as the finite element results. This method can provide useful guidance to the actual design process.

Validation of a FEM Model for the Simulation of the Cold Roll Forming Process

2015 ◽  
Vol 651-653 ◽  
pp. 219-224 ◽  
Author(s):  
Antonio Formisano ◽  
F. Capece Minutolo ◽  
Antonio Caraviello ◽  
Luigi Carrino ◽  
Massimo Durante ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Technological Process ◽  
Cross Section ◽  
Circular Cross Section ◽  
Roll Forming ◽  
Cold Roll Forming ◽  
Forming Process ◽  
Fem Model ◽  
Cold Roll ◽  
Roll Forming Process

Cold roll forming is a process for plastic deformation, which allows realizing profiles, with a defined section and established length, from the plastic deformation of a metal sheet. The sheet is induced to cross several stands of rolls, arranged along the same axis of advancing. The rolls induce plastic deformation in the sheet and then lead it to the desired geometric configuration. In order to control the geometric parameters of the plate during the profiling, it was created a FEM model to simulate the final stage of the technological process, developed by an industrial production line of a company located in Naples (Italy), that sells tubes with several cross sections. In this phase, the semi-finished product, having a circular cross section, is forced to cross through four stands of rolls. In this way, it changes the geometric condition of the cross section from circular to square. The model was carried out using a non-linear calculation code, which allows analyzing the parameters of interest in the different process steps. The results, obtained numerically, were compared with the experimental ones through the measurement of five specimens, obtained directly from technological process. The values of percentage deviation, regarding the external dimension and the thickness, for each step of advancement, do not exceed the 3% of error. Then, the analysis results denote the capability to simulate the cold roll forming process using finite element method.

Adhesive tool wear in the cold roll forming process

Wear ◽  
2011 ◽  
Vol 271 (11-12) ◽  
pp. 2728-2745 ◽  
Author(s):  
Alexander S. Galakhar ◽  
Jeffrey D. Gates ◽  
William J.T. Daniel ◽  
Paul A. Meehan
Keyword(s):  
Tool Wear ◽  
Roll Forming ◽  
Cold Roll Forming ◽  
Forming Process ◽  
Cold Roll ◽  
Roll Forming Process

Comparison of Bending of Automotive Steels in Roll Forming and in a V-Die

2012 ◽  
Vol 504-506 ◽  
pp. 797-802 ◽  
Author(s):  
Matthias Weiss ◽  
Jascha Marnette ◽  
Preston Wolfram ◽  
Jon Larrañaga ◽  
Peter D. Hodgson
Keyword(s):  
Analytical Equation ◽  
Roll Forming ◽  
Cold Roll Forming ◽  
Forming Process ◽  
Cold Roll ◽  
Bending Process ◽  
Roll Forming Process ◽  
Springback Angle ◽  
Die Forming ◽  
Good Agreement

Bending in a V-die has been used to indicate the outcome of bending in cold roll forming, although little direct correlation has been performed. In this work direct comparison of the springback in both processes was performed using six samples of automotive steels in a conventional roll forming line where the transverse springback is measured. A bend of similar radius was formed in a V-die and the springback determined. In general, the springback in V-die forming was greater than in roll forming, in some cases by a factor of 2. The theoretical springback angle was determined for all steels using a simple and approximate analytical equation and compared to the experimental roll forming and bending results. While for the roll forming process good agreement was achieved the theoretical values significantly underestimated springback in the V-bending process.

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