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Logo: Institut für Elektroprozesstechnik/Leibniz Universität Hannover
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Logo: Institut für Elektroprozesstechnik/Leibniz Universität Hannover
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DeVaPro - Development of a Variable Warm Forging Process Chain

Leitung:Prof. Dr.-Ing. E. Baake (Teilprojekt ETP)
Bearbeitung:Dipl.-Ing. M. Mach (Teilprojekt ETP)
Laufzeit:01/2009 - 01/2011
Förderung durch:Seventh Framework Programme of the European Union
Link:www.devapro.de
Bild DeVaPro - Development of a Variable Warm Forging Process Chain

Against the background of rising market opportunities for high quality warm forged products, in the project DeVaPro – "Development of a Variable warm forging Process" a warm forging process is developed, enabling the forges to produce more complex long flat geometries and thus making the warm forging technology more variable. Warm forging is an economical alternative to the conventional forging technology providing reduced energy input, no scale and reduced decarburization improving the product quality as well as reduced surface roughness and closer tolerances.

Additionally, the replacement of heat-treatable steels by low alloy steels due to improved work piece properties of warm forged products and the potential for light weight design is investigated. To reach those goals, new technologies, namely a warm rolling operation and an induction reheating process are developed and embedded within an established warm forging process chain. The integration of these operations enables the forges to increase the output, improve the final work piece properties and broaden the spectrum of producible geometries.

For two model products the production sequences are developed and tested based on two warm rolling technologies (cross wedge rolling and forge rolling) to evaluate the qualification of both rolling technologies concerning application at lowered temperatures.

A definition of part groups enables SMEs to deduce the possibility of the developed warm forming process chain for other parts of their spectrum. This definition includes distinctive features, to assess the transferability easy and quick. A definition of part groups enables SMEs to deduce the possibility of the developed warm forming process chain for other parts of their spectrum. This definition includes distinctive features, to assess the transferability easy and quick.

After the warm rolling operation an intermediate heating is necessary. A main goal for heating for forging is to reach a certain constant temperature throughout the work piece within a minimum time and a maximum of efficiency. The heating line can be adapted very flexible to different work piece diameters and production rates. The whole heating process is controlled by special design software and digital controllers.

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