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Quantity and Quality: Novel Sensor Module Ensures Efficient Production

12.03.2013
Flexibility, individuality and efficiency are some of the most powerful driving forces in industrial production.

Defects, especially fractures and wrinkles, slow down production processes and increase the reject rate when forming mass products, e. g. during deep-drawing of automotive parts or the manufacture of prototypes.


Layer by layer: The production steps of thin film sensor technology. © Fraunhofer IST

Fraunhofer researchers have developed a multifunctional thin film system which is located directly in the main load zones and allows for a sensitive and highly dynamic monitoring of the process. A variety of sensor modules will be presented from April 8 – 12, 2013 at Hannover Messe (hall 3, booth D25 and hall 2, booth D18).

There is almost no room for extras where stress in forming processes is at its highest level. Here, precision is the keyword. Therefore sensor systems that monitor the process are often located far from the critical range of forming tools. Researchers of the Fraunhofer Institute for Surface Engineering and Thin Films develop multifunctional sensor modules that are customized for the respective system and incorporated in the main load zones free of play, thus making a long-term stable acquisition of relevant process parameters possible.

The main part of the thin film sensor system is the DiaForce® layer – an amorphous hydrocarbon coating developed at Fraunhofer IST. The layer combines tribological stability with piezoresistive properties so that the sensor can measure forces directly in the main load zones without suffering from wear. Online monitoring, for example of the draw-in movement of sheet metal during deep-drawing processes, and accurate information acquisition from direct contact with the sheet become possible with the DiaForce® layer.
The sensor module can be applied in a variety of fields: Not only deep-drawing systems but also die-cutting systems are important application areas. Here, the module measures the cutting forces in direct contact with the punch. The thin film sensor system offers maximum flexibility when it is incorporated in washers and, in this form, can be built into virtually any system geometry without much effort, ensuring long-term stable data acquisition and monitoring of the production process.

Press contact: Dr. Simone Kondruweit | Elena Dröge
Fraunhofer Institute for Surface Engineering and Thin Films IST | Phone +49 531 2155-536 | elena.droege@ist.fraunhofer.de

Bienroder Weg 54 E | 38108 Braunschweig | info@ist.fraunhofer.de

Dr. Simone Kondruweit | Fraunhofer-Institut
Further information:
http://www.ist.fraunhofer.de
http://www.ist.fraunhofer.de/en.html

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