MATERIAL PARRAMETER IDENTIFICATION AND OPTIMAL TECHNOLOGICAL PARAMET-ER PREDICTION FOR INTELLIGENT CONTROL OF V-SHAPE FREE BENDING PROCESS OF WIDE SHEET METAL

2005 ◽  
Vol 41 (04) ◽  
pp. 199
Author(s):  
Yingping Guan
Keyword(s):  
Sheet Metal ◽  
Intelligent Control ◽  
Bending Process ◽  
Free Bending

Intelligent Control Experiment Study for V-Shape Free Bending of Wide Sheet Metal

2008 ◽  
Vol 575-578 ◽  
pp. 186-191
Author(s):  
Jun Zhao ◽  
Chun Jian Su ◽  
Ying Ping Guan
Keyword(s):  
Sheet Metal ◽  
Intelligent Control ◽  
Control Experiment ◽  
Bending Process ◽  
Prediction And Control ◽  
The Neural Networks ◽  
Die Material ◽  
Object Of Study ◽  
And Control ◽  
Free Bending

The main problem in bending process of sheet metal is that it is difficult to control bending springback accurately. Springback produced from the unloading of bending makes the shape and size incongruent between bending workpiece and working portion of die. Because the final shape of bending workpiece is related with the whole deformation process, the geometric parameter of die, material performance parameter will have great effect on springback. Therefore, the springback problem is very complicated and the prediction and control of springback is the key to improve the accuracy of bending workpiece. Taking the V free bending of wide sheet as an object of study, the neural networks technology and data acquisition system based on LabVIEW are used to establish intelligent control experiment system for V free bending of wide sheet metal. The control accuracy of system is high and it provides the basis for the realization of intelligent control for V-shape free bending of wide sheet metal in practice in future.

Springback Compensation by Superposition of Stress in Air Bending

2009 ◽  
Vol 410-411 ◽  
pp. 621-628 ◽  
Author(s):  
Andres Weinrich ◽  
Nooman Ben Khalifa ◽  
Sami Chatti ◽  
Uwe Dirksen ◽  
A. Erman Tekkaya
Keyword(s):  
Sheet Metal ◽  
New Method ◽  
Lightweight Construction ◽  
Springback Compensation ◽  
Air Bending ◽  
Forming Technology ◽  
Bending Process ◽  
The Common ◽  
Metal Processing Industry ◽  
Free Bending

In the sheet metal processing industry bending is one of the common metal forming processes. Depending on the process state, a differentiation has to be made between free bending (air bending) in the die and coining (die bending). Because of its flexibility the air bending process is nowadays one of the widely applied processes for sheet metal bending, but the springback phenomenon is still a great challenge for the industrial application. At the Institute of Forming Technology and Lightweight Construction (IUL) of the Technische Universität Dortmund, Germany, a new method has been developed allowing the compensation of springback effects in air bending of sheet metals. This method is based on the incremental and local superposition of stresses in the forming zone. The superposition occurs after the bending operation but before unloading along the sheet metal width. The advantage of this new method is that a minimal force is required to compensate the springback. This paper describes the springback compensation method in detail and presents first experimental results.

Prediction of springback in wipe-bending process of sheet metal using neural network

2009 ◽  
Vol 30 (2) ◽  
pp. 418-423 ◽  
Author(s):  
Recep Kazan ◽  
Mehmet Fırat ◽  
Aysun Egrisogut Tiryaki
Keyword(s):  
Neural Network ◽  
Sheet Metal ◽  
Bending Process

Investigation on the influence of mandrel on the forming quality of thin-walled tube during free bending process

2021 ◽  
Vol 72 ◽  
pp. 215-226
Author(s):  
Cheng Cheng ◽  
Hao Chen ◽  
Jiaxin Guo ◽  
Xunzhong Guo ◽  
Yuanji Shi
Keyword(s):  
Forming Quality ◽  
Bending Process ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Free Bending

Springback prediction of AL6061 pipe in free bending process based on finite element and analytic methods

2020 ◽  
Vol 109 (7-8) ◽  
pp. 1789-1799
Author(s):  
Yusen Li ◽  
Andi Li ◽  
Zhenming Yue ◽  
Liangyu Qiu ◽  
Houssem Badreddine ◽  
...  
Keyword(s):  
Finite Element ◽  
Analytic Methods ◽  
Bending Process ◽  
Springback Prediction ◽  
Free Bending

Experimental Study on Line Single Surface Laser Bending Process of Sheet Metal

2011 ◽  
Vol 48 (8) ◽  
pp. 081408
Author(s):  
姜敏凤 Jiang Minfeng ◽  
陶茂科 Tao Maoke ◽  
刘会霞 Liu Huixia ◽  
李品 Lin Pin ◽  
张成 Zhang Cheng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Sheet Metal ◽  
Laser Bending ◽  
Bending Process ◽  
On Line ◽  
Surface Laser

Total Flexibility in Forming Technology by Servo Presses

2014 ◽  
Vol 907 ◽  
pp. 99-112 ◽  
Author(s):  
Jörg Avemann ◽  
Stefan Calmano ◽  
Sebastian Schmitt ◽  
Peter Groche
Keyword(s):  
Mass Production ◽  
Degrees Of Freedom ◽  
Sheet Thickness ◽  
The Other ◽  
Adaptive Control System ◽  
High Productivity ◽  
Forming Technology ◽  
Bending Process ◽  
Product And Process ◽  
Free Bending

In forming technology, uncertainty can arouse from fluctuations in demand scenarios on one hand and in properties of semi-finished parts on the other. These technologies are usually characterized by a high productivity in mass production. However, high development efforts and investment costs for processes and machines lead to a rigid product and process spectrum. One approach to encounter these uncertainties is the introduction of flexibility into forming technologies by enlarging the number of degrees of freedom without drastically reducing productivity. The 3D Servo Press fulfils the mentioned requirements by exceeding free ram motion of conventional servo presses by two rotational ram DoFs. The adaptive control system coordinates the machine motion and controls product properties by model-based algorithms. Possibilities of this approach are demonstrated in a free bending process of a heat dissipater, resulting in uniform product quality despite variations in material, sheet thickness and desired geometry.

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