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Off-axis machining of NURBS freeform surfaces by fast tool servo system

 
: Brecher, Christian; Lange, Sven Carsten; Merz, Michael; Niehaus, Frank; Winterschladen, Markus

:

Menz, W.; Dimov, S.S.; Fillon, B. ; 4M Network of Excellence; European Commission, Sixth Framework Programme for Research and Technological Development -FP6-:
4M2006, Second International Conference on Multi-Material Micro Manufacture. Proceedings : 20-22 September 2006 Grenoble, France
Oxford: Elsevier, 2006
ISBN: 0-08-045263-0
ISBN: 978-0-08-045263-9
S.59-62
International Conference on Multi-Material Micro Manufacture (4M) <2, 2006, Grenoble>
Englisch
Konferenzbeitrag
Fraunhofer IPT ()
ultraprecision machining; fast tool servo system; freeform surfaces; NURBS; Off-Axis Turning

Abstract
The manufacturing of optical components with complex geometries like freeform surfaces is getting more and more important. Mass production of these optics is enabled by replication methods like injection moulding. For the machining of the required mould inserts with freeform geometries ultraprecision technologies like Fast Tool Servo turning can be applied to achieve the appropriate optical surface quality. For the mathematical description of freeform surfaces NURBS (Non Uniform Rational Basis Splines) are highly applicable. To avoid interpolation errors and to create set points with a continuous and smooth path of motion a trajectory generator directly based on NURBS data has been developed for Fast Tool Servo assisted turning [1], which evaluates the NURBS surface in each position control cycle. An approach of increasing the efficiency of manufacturing freeform surfaces is the off-axis machining of multiple workpieces at the same time. The paper presents the different process steps in simulation and off-axis machining of freeform surfaces using Fast Tool Servo assisted turning in conjunction with NURBS based data processing.

: http://publica.fraunhofer.de/dokumente/N-66755.html