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Ultraprecise 5-axis machining by compact, integral design

Ultrapräzise 5-Achsen-Bearbeitung durch Kompaktheit und integrierte Funktion
: Brecher, C.; Utsch, P.; Wenzel, C.

European Society for Precision Engineering and Nanotechnology -EUSPEN-:
EUSPEN 2009, 9th International Conference of the European Society for Precision Engineering & Nanotechnology. Proceedings. Vol.1 : 2nd-5th June 2009, San Sebastian, Spain
Bedford: Euspen, 2009
ISBN: 978-0-9553082-6-0
European Society for Precision Engineering and Nanotechnology (International Conference) <9, 2009, San Sebastian>
Conference Paper
Fraunhofer IPT ()
Fertigungsgenauigkeit; hydrostatisches Lager; Kompaktbauweise; Mikrotechnik; Schleifen; Schleifmaschine; Steifigkeit

The requirements for the manufacturing of high-precise complex micro parts cannot be satisfied alone by conventional 5-axis machine systems since they are limited in their accuracy or stiffness. For this reason, the Fraunhofer IPT investigates and implements design strategies for the successful development of high-precise and stiff five-axis machine tools. Hereby the focus is set on descreasing the error activating cantilevers by reducing the overall machine dimensions (compact design) and additionally to reduce the number of joint patches, error activating cantilevers and moving masses by integrating several functions in particular items (integral design). This is exemplarily shown in the development of a five-axis grinding machine and the integration of a hydrostatic radial bearing into a torque drive. The two decribed design strategies follow precision design fundamentals and focus on the reduction of error activating cantilevers affecting Abbe, Pivot and Thermal Errors. Due to the compact design of the five-axis machine, a spatial positioning error of smaller than 3 micron and highest stiffness can be achieved. By the integration of a hydrostatic bearing into a torque drive, the Steiner Distance and Inertia is reduced substential. Both demonstrate the effectiveness of the design strategies that can be addoped for other machine systems also.