Electrohydraulic Forming of Light Weight Automotive Panels
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Date
2016-04-27
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Abstract
This paper describes the results of development of the electrohydraulic forming (EHF)
process as a near-net shape automotive panel manufacturing technology. EHF is an
electro-dynamic process based upon high-voltage discharge of capacitors between two
electrodes positioned in a fluid-filled chamber. This process is extremely fast, uses lowercost
single-sided tooling, and potentially derives significantly increased formability from
many sheet metal materials due to the elevated strain rate. Major results obtained during
this study include: developing numerical model of the EHF; demonstrating increased
formability for high-strength materials and other technical benefits of using EHF;
developing the electrode design suitable for high volume production conditions;
understanding the limitations on loads on the die in pulsed forming conditions; developing
an automated fully computer controlled and robust EHF cell; demonstration of
electrohydraulic springback calibration and electrohydraulic trimming of stamped panels;
full scale demonstration of a hybrid conventional and EHF forming process for automotive
dash panel.
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Keywords
electrohydraulic forming, automotive panels, high voltage discharge
Subjects based on RSWK
Umformen, Elektrohydraulik, Hochspannungsentladung