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Control of thermal flow in machine tools using shape memory alloys

Steuerung von Wärmefluss in Werkzeugmaschinen unter Einsatz von Formgedächtnislegierungen
: Neugebauer, Reimund

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World Academy of Science, Engineering and Technology, WASET. Proceedings (2012), Nr.71, S.697-701
ISSN: 2070-3724
International Conference on Smart Materials and Nanotechnology in Engineering (ICSMNE) <2012, Venedig>
Zeitschriftenaufsatz, Konferenzbeitrag, Elektronische Publikation
Fraunhofer IWU ()
energy-efficiency; heat transfer path; MT thermal stability; thermal shape memory alloy

In this paper the authors propose and verify an approach to control heat flow in machine tool components. Thermal deformations are a main aspect that affects the accuracy of machining.Due to goals of energy efficiency, thermal basic loads should be reduced. This leads to inhomogeneous and time variant temperature profiles. To counteract these negative consequences, material with high melting enthalpy is used as a method for thermal stabilization. The increased thermal capacity slows down the transient thermal behavior. To account for the delayed thermal equilibrium, a control mechanism for thermal flow is introduced. By varying a gap in a heat flow path the thermal resistance of an assembly can be controlled. This mechanism is evaluated in two experimental setups. First to validate the ability to control the thermal resistance and second to prove the possibility of a self-sufficient option based on the selfsensing abilities of thermal shape memory alloys.