Experimental Investigations on the Optimum Driver Configuration for Electromagnetic Sheet Metal Forming
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Date
2014
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Abstract
Electromagnetic forming is a high speed forming process especially suitable for materials
with high electrical conductivity such as copper or aluminum. In case of materials with
comparatively low electrical conductivity (e.g. stainless steel or titanium) the use of
so-called driver sheets is a common approach. Various publications proved that this way
materials with low electrical conductivity and even non-conductive materials can be
formed. Although the use of driver sheets is common practice, there are no or only
contradicting recommendations regarding the optimum driver sheet configuration.
Based on experimental investigations of the electromagnetic sheet metal forming process,
this paper investigates the optimum material and thickness of the driver sheet. The results
prove that aluminum should be favored over copper as driver material. The optimum
driver thickness was found to be dependent on thickness and electrical conductivity of the
workpiece. Even in case of a workpiece made of aluminum the use of a driver sheet could
enhance the efficiency of the process.
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Keywords
electromagnetic forming, driver materials, sheet metal forming