NDLI: Improved Robustness Through Closed-Loop Control for Aluminum Sheet Metal Stamp Forming

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	William, J. Emblom Klaus, J. Weinmann
Copyright Year	2008
Abstract	A stamp forming die, whose flexible blank holder was designed using FEA, was built. Tests were performed to evaluate the robustness of the die once closed-loop control was implemented. These results were compared to the results of open-loop tests presented earlier. The closed-loop tests were designed to determine the die and control system’s ability to reject process disturbances and demonstrate improved robustness in stamp forming when using a flexible blank holder and closed-loop control. Draw beads were used to control local punch forces and blank holder forces were used to control wrinkling. Experimental tests for the die demonstrated that closed-loop control of local punch forces using active draw beads improves robustness of the die. Two different lubricants and varying quantities of lubricant were evaluated for this study. Additionally, the ability to simultaneously use draw bead height to control local punch force and blank holder force to control wrinkles was demonstrated.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISBN	9780791848654
DOI	10.1115/IMECE2008-67025
e-ISBN	9780791838402
Volume Number	Volume 4: Design and Manufacturing
Conference Proceedings	ASME 2008 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2008-10-31
Publisher Place	Boston, Massachusetts, USA
Access Restriction	Subscribed
Subject Keyword	Blanks Robustness Finite element analysis Lubricants Aluminum Sheet metal
Content Type	Text
Resource Type	Article

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