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Control design and experimental validation of an adaptive spindle support for enhanced cutting processes

 
: Neugebauer, Reimund; Drossel, W.-G.; Bucht, A.; Kranz, B.; Pagel, K.

:
Postprint urn:nbn:de:0011-n-1374187 (250 KByte PDF)
MD5 Fingerprint: a19b60ae5094b219ca5e7eb578567706
Erstellt am: 29.3.2011


CIRP Annals. Manufacturing Technology 59 (2010), Nr.1, S.373-376
ISSN: 0007-8506
International Academy for Production Engineering (CIRP General Assembly) <60, 2009, Pisa>
Englisch
Konferenzbeitrag, Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IWU ()
piezo-electric; control; adaptive spindle

Abstract
In this paper we present an adaptive spindle support that can be used for additional fine positioning movements during machining operations. This is achieved by an overlaid piezo-based hexapodkinematic structure that is mounted between the machine structure and the motor spindle. Here we present the analysis of the spindle support regarding control aspects. The basis is a finite-element-model that was used to determine a state space model of the component. The model was validated by an experimental modal analysis of the structure. Knowing the modal characteristics allows an analysis of the mechanical couplings between the different axes of the spindle support which accordingly enables the design of a controller considering mechanical couplings. For experimental validation the controller was implemented into a rapid prototyping system. The presented results show that during cutting operations the spindle can be moved with high precision within a wide range of frequencies.

: http://publica.fraunhofer.de/dokumente/N-137418.html