scholarly journals Flexible Roll Forming Technology for Multi-Curved Sheet Metal Forming

2013 ◽  
Vol 22 (5) ◽  
pp. 243-249 ◽  
Author(s):  
J.S. Yoon ◽  
S.E. Son ◽  
W.J. Song ◽  
J. Kim ◽  
B.S. Kang
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Roll Forming ◽  
Flexible Roll Forming ◽  
Forming Technology ◽  
Flexible Roll

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 Flexible Roll Forming on-Line Detection Algorithm Based on Machine Vision

2012 ◽  
Vol 457-458 ◽  
pp. 287-292 ◽  
Author(s):  
Xu Peng Li ◽  
Bo Qian ◽  
Qiang Li
Keyword(s):  
Control System ◽  
Machine Vision ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Detection Algorithm ◽  
Roll Forming ◽  
Loop Control ◽  
Flexible Roll Forming ◽  
Flexible Roll

For the flexible roll forming of the control system, this paper introduces a method that machine vision bind to the flexible roll forming control system. The detection method for sheet metal forming is image acquisition, image processing and other means for the extraction of sheet metal forming in some time section contour curve. Compare extraction section contour curve with the moment theory section contour curve in the control system, get the deviation value and feedback to the control system that interpolation arithmetic to realize closed loop control.

Formability limits by wrinkling in sheet metal forming

2016 ◽  
Vol 232 (8) ◽  
pp. 681-692 ◽  
Author(s):  
JPG Magrinho ◽  
CMA Silva ◽  
MB Silva ◽  
Paulo AF Martins
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Effective Strain ◽  
Stress Triaxiality ◽  
Roll Forming ◽  
Blank Holder ◽  
Flexible Roll ◽  
Plane Compression ◽  
Level Of Understanding

This paper presents a new combined experimental and theoretical methodology for determining the formability limits by wrinkling in sheet metal forming. The methodology is based on the utilization of rectangular test specimens clamped along its narrower sides and compressed lengthwise and is aimed at replicating the physics behind the occurrence of wrinkling in deformation regions submitted to in-plane compression along one direction. The methodology draws from a previous development in the field of flexible roll forming, and the overall objectives are to enhance and improve its methods and procedures and to provide a new level of understanding on the onset of wrinkling in sheet metal forming. Experimentation and finite element modelling of cylindrical deep-drawing without blank holder combined with the utilization of the space of effective strain vs. stress triaxiality are employed to discuss the applicability and validity of the new proposed methodology for determining the formability limits by wrinkling.

The Development/Application of Sheet Metal Forming Technology at Alcoa

1993 ◽  
Author(s):  
E. Chu ◽  
K. N. Shah ◽  
F. Pourboghrat ◽  
K. Chandorkar
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Forming Technology ◽  
Development Application

scholarly journals Developments of New Sheet Metal Forming Technology and Theory in China

2015 ◽  
Vol 28 (12) ◽  
pp. 1452-1470 ◽  
Author(s):  
Shi-Hong Zhang ◽  
Shuai-Feng Chen ◽  
Yan Ma ◽  
Hong-Wu Song ◽  
Ming Cheng
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Forming Technology

Study on the Surface Quality of Fender NC Incremental Forming

2011 ◽  
Vol 335-336 ◽  
pp. 523-526
Author(s):  
Liu Ru Zhou
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Process Time ◽  
Forming Process ◽  
Forming Technology ◽  
Starting Point ◽  
Incremental Sheet Metal Forming ◽  
Metal Deformation ◽  
Improvement Method

The NC incremental sheet metal forming technology is a flexible forming technology without dedicated forming dies. The forming locus of the forming tool can be adjusted by correcting the numerical model of the product. Because the deformation of sheet metal only occurs around the tool head and the deformed region is subjected to stretch deformation, the deformed region of sheet metal thins, and surface area increases. Sheet metal forming stepwise is to lead to the whole sheet metal deformation. The principle of NC incremental sheet metal forming and the forming process of the fender are introduced. The effect of process parameters on forming is analysed. The improvement method of the forming quality is suggested. The groove is created in the starting point of tool moving when the starting point of tool moving locus at all layers is identical. The groove can be eliminated when the starting point of tool moving locus at all layers is different. The feed pitch p increase, the process time decrease, production rate and surface degree of roughness increase. In general, the feed pitch is 0.25mm.

Track Simulation of Flexible Roll Forming Based on VC++ and OpenGL

2012 ◽  
Vol 457-458 ◽  
pp. 304-307
Author(s):  
Wen Ting Sun ◽  
Qiang Li ◽  
Bo Qian
Keyword(s):  
Rotation Angle ◽  
High Strength ◽  
Roll Forming ◽  
Interpolation Algorithm ◽  
Nc System ◽  
Flexible Roll Forming ◽  
Forming Technology ◽  
Core Module ◽  
Flexible Roll ◽  
Track Simulation

How to manufacture high accuracy, complex section, high strength steel products is the current challenge of flexible roll forming technology. This article introduced opening NC system application in flexible roll forming, both in software and in hardware. As the core module of the software system, the interpolation module was discussed. The article mainly focused on how to establish track simulation module. According to the algorithm, we calculated the roller displacement and rotation angle using VC++. At last the simulation processes and results were presented, which prove the trace interpolation algorithm is correct and feasible.

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