Exceeding the Forming Limit Curve with Deep Drawing Followed by Electromagnetic Calibration
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Date
2012-07-17
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Abstract
We show that the materials quasi-static forming limit curve (FLC) can be exceeded by the
process chain composed of deep drawing followed by electromagnetic forming. We form
circular cups as close as possible to the FLC by deep drawing. These cups are then
further formed (calibrated) by electromagnetic forming. The electromagnetic forming takes
place in the punch edge radius region. The results show significant amount of material in
this region exceeding the FLC by means of the process chain. Further research is needed
to reveal the factors leading to this increase in forming limits.
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Keywords
electromagnetic forming, forming limits, process chain