scholarly journals An Effect of Process Parameters on the Generation of Sheet Metal Curvatures in the Incremental Roll Forming Process

2004 ◽  
Vol 13 (2) ◽  
pp. 122-128
Keyword(s):  
Sheet Metal ◽  
Process Parameters ◽  
Roll Forming ◽  
Forming Process ◽  
Roll Forming Process

Study on flexibly-reconfigurable roll forming process for multi-curved surface of sheet metal

2014 ◽  
Vol 15 (6) ◽  
pp. 1069-1074 ◽  
Author(s):  
Jun-Seok Yoon ◽  
So-Eun Son ◽  
Woo-Jin Song ◽  
Jeong Kim ◽  
Beom-Soo Kang
Keyword(s):  
Sheet Metal ◽  
Curved Surface ◽  
Roll Forming ◽  
Forming Process ◽  
Roll Forming Process

Application of Support Vector Regression and Genetic Algorithm to Reduce Web Warping in Flexible Roll-Forming Process

2020 ◽  
Vol 143 (3) ◽  
Author(s):  
Young Yun Woo ◽  
Dae-Cheol Ko ◽  
Taekyung Lee ◽  
Yangjin Kim ◽  
Ji Hoon Kim ◽  
...  
Keyword(s):  
Process Parameters ◽  
Optimization Method ◽  
Roll Forming ◽  
Support Vector ◽  
Forming Process ◽  
Flexible Roll Forming ◽  
Flexible Roll ◽  
Roll Forming Process ◽  
Web Warping ◽  
The Web

Abstract In a flexible roll-forming process, a metal blank is incrementally deformed into the desired shape with a variable cross-sectional profile by passing the blank through a series of forming rolls. Because of the combined effects of process and material parameters on the quality of the roll-formed product, the approaches used to optimize the roll-forming process have been largely based on experience and trial-and-error methods. Web warping is one of the major shape defects encountered in flexible roll forming. In this study, an optimization method was developed using support vector regression (SVR) and a genetic algorithm (GA) to reduce web warping in flexible roll forming. An SVR model was developed to predict the web-warping height, and a response surface method was used to investigate the effect of the process parameters. In the development of these predictive models, three process parameters—the forming-roll speed condition, leveling-roll height, and bend angle—were considered as the model inputs, and the web-warping height was used as the response variable. The GA used the web-warping height and the cost of the roll-forming system as the fitness function to optimize the process parameters of the flexible roll-forming process. When the flexible roll-forming process was carried out using the optimized process parameters, the obtained experimental results indicated a reduction in web warping. Hence, the feasibility of the proposed optimization method was confirmed.

Optimization of roll forming process parameters—a semi-empirical approach

2009 ◽  
Vol 47 (9-12) ◽  
pp. 1041-1052 ◽  
Author(s):  
John Paralikas ◽  
Konstantinos Salonitis ◽  
George Chryssolouris
Keyword(s):  
Process Parameters ◽  
Empirical Approach ◽  
Roll Forming ◽  
Forming Process ◽  
Semi Empirical ◽  
Roll Forming Process

Modeling and Simulation of Continuous Flexible Roll Forming Process

2013 ◽  
Vol 365-366 ◽  
pp. 549-552
Author(s):  
Zhou Sui ◽  
Zhong Yi Cai ◽  
Ming Zhe Li
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Three Dimensional ◽  
Rigid Bodies ◽  
Roll Forming ◽  
Forming Process ◽  
Flexible Roll Forming ◽  
Flexible Roll ◽  
Roll Forming Process

The continuous flexible roll forming process is a novel sheet metal forming technique for effectively manufacture of three-dimensional surface parts. In this study, two types of finite element (FE) models were developed under the ABAQUS/Explicit environment. The difference of the two models is that the rolls are defined as discrete rigid bodies in model No.1 and are deformable in model No.2. An experiment was carried out using the continuous sheet metal forming setup. The comparison of the numerical computation results with the experimental results shows that the model No.2 can be used for the shape prediction of continuous flexible roll forming process well.

A New Engineering Technique in Roller Design to Prevent Thinning of Sheet in Roll Forming Process

2017 ◽  
Vol 873 ◽  
pp. 42-47
Author(s):  
Dong Won Jung
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Metal Sheet ◽  
Roll Forming ◽  
Forming Process ◽  
Explicit Finite Element ◽  
Main Challenge ◽  
Engineering Technique ◽  
Roll Forming Process

These days sheet metal forming is a widely used in different industrial fields with large production volumes. Formability of metal sheets is limited by localized necking and plastic instability. In sheet metal forming processes like drawing and stamping the main challenge is thinning of the metal sheet in some regions. To reduce thinning of the sheet product, roll forming has been suggested instead of stamping process. Thinning strain can cause necking, tearing or wrinkling which are failure of the metal sheet. In this study a new engineering technique is proposed in order to prevent thinning of the steel galvanized hot coil commercial (SGHC) in roll forming process. An explicit finite element code, ABAQUS software, was used to simulate the roll forming process. The results show that the proposed technique has an important effect on thinning of the sheet and can reduce it significantly. Investigation on the second and third and fourth rollers show the effect of modified roller dimension as on reducing the thickness. These reductions in second, third and fourth rollers are from 4 percent to 0.5 percent, 2.8 to 1.4 percent and from 1.4 to 0.7 percent respectively. The reasons of the new techniques effect were also discussed.

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