Process reliability and reproducibility of pneumomechanical and electrohydraulic forming processes
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Date
2014
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Abstract
A sufficiently high process reliability and reproducibility is mandatory if a high-speed
forming process is to be used in industrial production. A great deal of basic research work
into pneumo-mechanical and electrohydraulic forming has been successfully performed in
different institutions in the past. There, the focus has been more on process related
correlations, such as the influence and interaction of different parameters on the course
and result of those processes. The aspects of reliability and reproducibility have not been
examined to a sufficient extent. Hence, in the case of pneumo-mechanical forming,
insufficient investigations have been conducted into the effect that key parameters like the
kinetic energy level, the filling height of the working media or the conditions inside the
acceleration tube have on the reproducibility and course of the process. For
electrohydraulic forming, the repeatability has worsened on occasions up to now. To
improve the forming results and, in particular, the reputability of the process, it is
necessary to examine the tool parameters associated with the electrodes and the working
media. That is why research of this type is currently ongoing at the LUF. One important
issue here is examining the options that exist for visualising the way the spark takes hold
in the discharge chamber.
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Keywords
High Speed Forming, Electrohydraulic Forming, Pneumo-mechanical Forming