Closed-loop control of the blank holding force in sheet metal forming with a new embedded-type displacement sensor

2004 ◽  
Vol 24 (7-8) ◽  
pp. 553-559 ◽  
Author(s):  
Sy-Wei Lo ◽  
Tsu-Chang Yang
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Closed Loop ◽  
Displacement Sensor ◽  
Closed Loop Control ◽  
Loop Control ◽  
Blank Holding Force ◽  
Embedded Type

In-Process Visualisation for Deformation Monitoring and Analysis of Sheet Metal Forming Processes

2013 ◽  
Vol 677 ◽  
pp. 384-387 ◽  
Author(s):  
Wai Kei Ricky Kot ◽  
Luen Chow Chan
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Deformation Process ◽  
Deformation Monitoring ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
Profile Data ◽  
Profile Change

In this paper, a visualisation system will be discussed that can be used to capture the deformation profile of the sheet blank during sheet metal forming processes, such as deep drawing and shape forming. The visualisation system utilizes a 2D laser displacement sensor for deformation profile acquisition. The sensor is embedded in the die and the laser propagates through the die to detect the profile change of the specimen concealed in the die during operation. The captured profile data will be collected, manipulated and transferred to a monitor for display via a controller. This visualisation of the deformation profile will provide engineers and researchers with an intuitive means of analysing and diagnosing the deformation process during sheet metal forming.

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.

scholarly journals Closed-loop control of product properties in metal forming: A review and prospectus

2014 ◽  
Vol 214 (11) ◽  
pp. 2333-2348 ◽  
Author(s):  
James A. Polyblank ◽  
Julian M. Allwood ◽  
Stephen R. Duncan
Keyword(s):  
Metal Forming ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Loop Control

Design of Stepping Motor Position Closed Loop Control System Based on PLC

2011 ◽  
Vol 127 ◽  
pp. 126-129
Author(s):  
Li Hong Wang ◽  
Yue Ling Zhao
Keyword(s):  
Control System ◽  
High Speed ◽  
Closed Loop ◽  
Position Control ◽  
Displacement Sensor ◽  
Closed Loop Control ◽  
Stepping Motor ◽  
Loop Control ◽  
Closed Loop Control System ◽  
Loop Control System

A stepping motor position closed loop control system was designed, which adopts displacement sensor to examine the position of the load. The system’s hardware constitute was given here, and the pulse control project was given at the same time. It uses the high-speed pulse output of PLC to export the adjustable frequency pulse. The adjustment of the frequency based on the error of initial value and actual value. On one hand, it can realize fast and accurate position control. On the other hand, it can overcome the weakness of losing step. Thus makes the system have better control function.

RCS Based Hardware-in-the-Loop Embedded Control of Industrial Stamping Processes

2003 ◽  
Author(s):  
S. Ananthakrishnan ◽  
Viswanath Ananth
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Open Architecture ◽  
Industrial Processes ◽  
Hardware In The Loop ◽  
Real Time Control ◽  
Design Environment ◽  
Loop Control ◽  
Time Control

There is a growing need for providing a flexible mechatronic environment to enhance productivity in industrial processes. Specifically, in the area of sheet metal forming, where stamping quality and part consistency are still achieved by traditional iterative process of trial and error, there is a clear urgency to enhance productivity and quality through automation. The traditional feedback control schemes used in many industrial processes cannot be applied to sheet metal forming, mainly due to the complexity of the stamping process and associated difficulty of using COTS (off-the-shelf) controllers for such applications. In this paper we demonstrate a hardware-in-the-loop flexible mechatronic design environment that will allow batch production of stamped parts with varying geometry and material properties, with minimal defects and greater consistency, using Simulink/RTW/xpcTarget framework which affords the feature of open architecture controller and the NIST Real-time Control System (RCS) architecture that allows structured, hierarchical implementation of industrial controllers. In conjunction with the Neutral Message Language (NML) RCS also allows for distributed hardware-in-the-loop control design with multiple processors. The merits of this approach over conventional approaches are also highlighted.

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