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http://dx.doi.org/10.7467/KSAE.2017.25.2.236

Development of Electrohydraulic Forming Apparatus and Its Experimental Study  

Woo, Mina (Department of Aerospace Engineering, Pusan National University)
Noh, Hakgon (Department of Aerospace Engineering, Pusan National University)
Song, WooJin (Department of Convergence Science, Pusan National University)
Kang, Beomsoo (Department of Aerospace Engineering, Pusan National University)
Kim, Jeong (Department of Aerospace Engineering, Pusan National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.25, no.2, 2017 , pp. 236-241 More about this Journal
Abstract
Electrohydraulic forming is a high-speed forming process that deforms a blank using electric discharge in liquid. When high voltage is discharged in the water, a shock wave is propagated from the tip of the electrodes to the blank, causing the blank to be deformed into the die. Electrohydraulic forming has many advantages including improved formability and reduced bouncing effect and springback. The objective of this paper was to conduct a feasibility study to identify the electrohydraulic effect. An electrohydraulic forming apparatus was developed and experiments were carried out. The results of the experiment showed that the developed apparatus had sufficient energy to deform the blank into the die. Using the hole to emit residual air in the die was more effective than using the vacuum pump in terms of saving on experiment time.
Keywords
Electrohydraulic forming; High-speed forming; Electric discharge; Shock wave; Residual air;
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