INVESTIGATION OF A PNEUMO-MECHANICAL HIGH SPEED FORMING PROCESS WITH RESPECT TO THE FORMING OF COMPLEX SHEET AND TUBE COMPONENTS
DOI:
https://doi.org/10.20535/2305-9001.2013.67.37850Keywords:
Pneumo-mechanical forming, High speed hydroforming, Sheet metal forming, Tube forming, HydroformingAbstract
Lightweight design is playing an increasing role in the automotive and aerospace industries due to the stringent emission regulations. Hence it is necessary to produce parts with complex geometries from sophisticated high-strength materials. In this context, and especially when high strength materials have to be formed into highly complex geometries, it is inevitable that new manufacturing processes will need to be developed which meet these requirements. High speed forming processes have a very high potential when it comes to shaping complex, sharp-edged parts and constitute a key means of reducing a component’s weight and hence of complying with the stringent emission regulations and also saving on essential resources. These processes and, in this case, pneumo-mechanical and electrohydraulic forming in particular, are a major subject of intense research at the University of Paderborn's Chair of Forming and Machining Technology (LUF). To be able to bring these processes into industrial use, it is necessary to identify the influence of different process parameters on the forming result. This will not only help to optimize the process itself, but will also lead to a better understanding of the process phenomena.
This paper presents recent results relating to the influence of different process parameters, such as the acceleration pressure and the filling level of the working media, on the forming result of sharp-edged, sheet metal parts and square-formed tube geometries in aluminium using a pneumo-mechanical, high speed forming process. It is seen that the forming result can effectively be influenced by varying the acceleration pressure and the filling level. Furthermore, this paper presents the results of basic research conducted on pneumo-mechanical high speed forming and its comparison with conventional hydroformingReferences
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