As an innovation leader, we always keep new technologies in mind and invest more than average in research and development so that our customers can place their trust in the perfect coolants from Rhenus Lub. Our current research project into structure-borne sound measurements is particularly promising, and is being investigated in collaboration with the Chair of Dynamics and Control at the University of Duisburg-Essen. The project expands on established torque measurements with structure-borne sound measurements in order to further differentiate and better qualify coolants for specific customer applications.

Structure-borne sound measurement promises profitable application

The innovative research project is being handled by Anna Lena Demmerling, R&D of Coolants at Rhenus Lub, as part of her occupational doctorate and highlights the importance that Rhenus Lub places on its research and promotion of young talent. The Chair of Dynamics and Control, under the direction of Prof. Dirk Söffker, is already working intensively in the field of real-time monitoring strategies with structure-borne sound, making it the ideal partner for the project.

Digital oscilloscope: Future-oriented technologies in coolant research

What do structure-borne sound measurements reveal?

In these tests, the outgoing signals of tribological contacts (for example, between the tool and the workpiece) are recorded and evaluated. During the test, sound is continually directed through the metal body and the amplitude or frequency changes. Changes that occur in the contact between the friction partners, such as through the loss of the lubricating film or increased wear, can be detected on the basis of the evaluated structure-borne sound signals and provide valuable input for the qualification of coolants.

Anna Lena Demmerling, R&D of Coolants at Rhenus Lub, investigated the qualification of coolants with structure-borne sound in collaboration with Prof. Dirk Söffker from the Chair of Dynamics and Control at the University of Duisburg-Essen.

Critical expertise in evaluation

In order to be able to capitalize on the results, the special challenge lies in evaluating and correctly analysing the measurements. “We want to strengthen and build on the necessary expertise within the research project at Rhenus Lub”, explains Anna Lena Demmerling. She adds: “We’re developing a measurement method that supplements established laboratory tests such as torque measurement in the tapping torque test and elevates the coolant suitability to yet another new level of quality, particularly in terms of the customer’s application.

More qualified rhenus coolants to come in the future

Initial trials in the joint project have already been completed successfully and those responsible, such as Dr Udo Quotschalla, Head of R&D, Quality Control at Rhenus Lub, are extremely optimistic: “This future-oriented technology helps us to gain a more thorough understanding of tribological backgrounds in machining and forming operations and allows us to perfectly match the composition of our high-performance lubricants in terms of additives and other components. This means that we can provide our customers with even better product recommendations, meaning that they can achieve a longer sump life and higher workpiece output.”

Further tests are currently underway, with the research project estimated to be completed in summer 2019.

Udo QuotschallaDr Udo Quotschalla
Head of Research & Development, Quality Control

Phone +49 2161 5869-347

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